(a) Except in the situations enumerated in paragraph (a)(2) of this section or as otherwise expressly excluded in this chapter, correspondence required to be filed in the U.S. Patent and Trademark Office within a set period of time will be considered as being timely filed if the procedure described in this section is followed. The actual date of receipt will be used for all other purposes.
(1) Correspondence will be considered as being timely filed if:
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The person signing the certificate should have reasonable basis to expect that the correspondence would be mailed or transmitted on or before the date indicated.

(c) The Office may require additional evidence to determine if the correspondence was timely filed.

A suggested format for a Certificate of Mailing and a Certificate of Transmission for facsimile transmissions and for transmissions via the USPTO patent electronic filing system under 37 CFR 1.8 to be included with the correspondence is reproduced below.

Under 37 CFR 1.8, a person may state on certain papers directed to the Office (some exceptions are stated in 37 CFR 1.8), the date on which the paper will be deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system. If the date stated is within the period for reply, the reply in most instances will be considered to be timely. This is true even if the paper does not actually reach the Office until after the end of the period for reply. The Certificate of Mailing procedure does not apply to papers mailed in a foreign country.

Under 37 CFR 1.8, a person may state on certain papers directed to the Office (some exceptions are stated in 37 CFR 1.8), the date on which the paper will be deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system. If the date stated is within the period for reply, the reply in most instances will be considered to be timely. This is true even if the paper does not actually reach the Office until after the end of the period for reply. The Certificate of Mailing procedure does not apply to papers mailed in a foreign country.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).

• (A) The certification requires a signature. Specifically, if the certification appears on a paper that requires a signature, two signatures are required, one for the paper and one for the certification. Although not specifically required by 37 CFR 1.8, it is preferred that the certificate be signed by the applicant or registered practitioner.
• (B) When possible, the certification should appear on a portion of the paper being submitted. However, if there is insufficient space to make the certification on the same paper, the certification should be on a separate sheet securely attached to the paper.
• (C) When the certification is presented on a separate sheet, that sheet must (1) be signed and (2) fully identify and be securely attached to the paper it accompanies. The required identification should include the application number and filing date of the application as well as the type of paper being filed, e.g., reply to rejection or refusal, Notice of Appeal, etc. An unsigned certification will not be considered acceptable.
  • Moreover, without the proper identifying data, a certification presented on a separate sheet will not be considered acceptable if there is any question or doubt concerning the connection between the sheet and the paper filed.
  • For submissions by the U.S. Postal Service or facsimile transmissions, if the sheet should become detached from the paper and thereafter not associated with the appropriate file, evidence that this sheet was received in the Office can be supported by submitting a copy of a postcard receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally mailed. Attention is directed to MPEP § 503 relative to the use of postcards as receipts. For submissions via the USPTO patent electronic filing system, evidence that this sheet was received in the Office can be supported by submitting a copy of an electronic acknowledgement receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally submitted. See MPEP §§ 502.05 and 503.
• (D) In situations wherein the correspondence includes papers for more than one application (e.g., a single envelope containing separate papers responding to Office actions in different applications) or papers for various parts of the Office (e.g., a patent issue fee transmittal form PTOL-85B and an assignment), each paper must have its own certification as a part thereof or attached thereto.
  • Although Part B of Form PTOL-85, Notice of Allowance and Fee(s) Due, may contain a Certificate of Mailing thereon, a separate Certificate of Mailing is required for all papers included with this form, including replacement drawings. Checks submitted with the papers do not require certification.
• (E) In situations wherein the correspondence includes several papers directed to the same area of the Office for the same application (for example, a proposed reply under 37 CFR 1.116 and a Notice of Appeal), each paper should have its own certification as a part thereof or attached thereto.
• (F) For the purposes of 37 CFR 1.8(a)(1)(i)(A), first class mail is interpreted as including Priority Mail Express ® and “Priority Mail” deposited with the U.S. Postal Service.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia). (A) The certification requires a signature. Specifically, if the certification appears on a paper that requires a signature, two signatures are required, one for the paper and one for the certification. Although not specifically required by 37 CFR 1.8, it is preferred that the certificate be signed by the applicant or registered practitioner.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia). (A) The certification requires a signature. Specifically, if the certification appears on a paper that requires a signature, two signatures are required, one for the paper and one for the certification. Although not specifically required by 37 CFR 1.8, it is preferred that the certificate be signed by the applicant or registered practitioner.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
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(B) When possible, the certification should appear on a portion of the paper being submitted. However, if there is insufficient space to make the certification on the same paper, the certification should be on a separate sheet securely attached to the paper.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
(D) In situations wherein the correspondence includes papers for more than one application (e.g., a single envelope containing separate papers responding to Office actions in different applications) or papers for various parts of the Office (e.g., a patent issue fee transmittal form PTOL-85B and an assignment), each paper must have its own certification as a part thereof or attached thereto. Although Part B of Form PTOL-85, Notice of Allowance and Fee(s) Due, may contain a Certificate of Mailing thereon, a separate Certificate of Mailing is required for all papers included with this form, including replacement drawings. Checks submitted with the papers do not require certification.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
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(F) For the purposes of 37 CFR 1.8(a)(1)(i)(A), first class mail is interpreted as including Priority Mail Express ® and “Priority Mail” deposited with the U.S. Postal Service.

However, the benefits of 37 CFR 1.8 or 37 CFR 1.10 apply only to documents delivered to the Office by the U.S. Postal Service. A number of instances have been uncovered where individuals are certifying that documents were deposited with the U.S. Postal Service when, in fact, the documents were hand-carried or delivered to the Office via commercial couriers, e.g., “Federal Express,” “DHL,” “Purolator,” “Air Borne,” or “UPS.” In those instances where documents include a Certificate of Mailing under 37 CFR 1.8 or Priority Mail Express ® mailing label (commonly used to comply with 37 CFR 1.10) but were delivered to the Office by other than the U.S. Postal Service, (OPAP) personnel are placing a notice indicating that fact on the correspondence involved to alert Office personnel that the benefits of 37 CFR 1.8 or 37 CFR 1.10 do not apply.

However, the benefits of 37 CFR 1.8 or 37 CFR 1.10 apply only to documents delivered to the Office by the U.S. Postal Service. A number of instances have been uncovered where individuals are certifying that documents were deposited with the U.S. Postal Service when, in fact, the documents were hand-carried or delivered to the Office via commercial couriers, e.g., “Federal Express,” “DHL,” “Purolator,” “Air Borne,” or “UPS.” In those instances where documents include a Certificate of Mailing under 37 CFR 1.8 or Priority Mail Express ® mailing label (commonly used to comply with 37 CFR 1.10) but were delivered to the Office by other than the U.S. Postal Service, (OPAP) personnel are placing a notice indicating that fact on the correspondence involved to alert Office personnel that the benefits of 37 CFR 1.8 or 37 CFR 1.10 do not apply.

The date indicated on the Certificate of Mailing or of Transmission will be used by the Office only to determine if the paper was deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system within the period for reply. If the paper was actually received in the Office within the period for reply, there is no need to refer to the Certificate. Note however, that 37 CFR 1.6(a)(3) provides that “[c]orrespondence transmitted by facsimile to the Patent and Trademark Office will be stamped with the date on which the complete transmission is received in the Patent and Trademark Office unless that date is a Saturday, Sunday, or Federal holiday within the District of Columbia, in which case the date stamped will be the next succeeding day which is not a Saturday, Sunday, or Federal holiday within the District of Columbia.” Note further that 37 CFR 1.6(a)(4) provides that “[c]orrespondence officially submitted to the Office by way of the USPTO patent electronic filing system will be accorded a receipt date, which is the date in Eastern Time when the correspondence is received in the Office regardless of whether that date is a Saturday, Sunday, or Federal holiday within the District of Columbia.

The date indicated on the Certificate of Mailing or of Transmission will be used by the Office only to determine if the paper was deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system within the period for reply. If the paper was actually received in the Office within the period for reply, there is no need to refer to the Certificate. Note however, that 37 CFR 1.6(a)(3) provides that “[c]orrespondence transmitted by facsimile to the Patent and Trademark Office will be stamped with the date on which the complete transmission is received in the Patent and Trademark Office unless that date is a Saturday, Sunday, or Federal holiday within the District of Columbia, in which case the date stamped will be the next succeeding day which is not a Saturday, Sunday, or Federal holiday within the District of Columbia.” Note further that 37 CFR 1.6(a)(4) provides that “[c]orrespondence officially submitted to the Office by way of the USPTO patent electronic filing system will be accorded a receipt date, which is the date in Eastern Time when the correspondence is received in the Office regardless of whether that date is a Saturday, Sunday, or Federal holiday within the District of Columbia.

The date indicated on the Certificate of Mailing or of Transmission will be used by the Office only to determine if the paper was deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system within the period for reply. If the paper was actually received in the Office within the period for reply, there is no need to refer to the Certificate. Note however, that 37 CFR 1.6(a)(3) provides that “[c]orrespondence transmitted by facsimile to the Patent and Trademark Office will be stamped with the date on which the complete transmission is received in the Patent and Trademark Office unless that date is a Saturday, Sunday, or Federal holiday within the District of Columbia, in which case the date stamped will be the next succeeding day which is not a Saturday, Sunday, or Federal holiday within the District of Columbia.” Note further that 37 CFR 1.6(a)(4) provides that “[c]orrespondence officially submitted to the Office by way of the USPTO patent electronic filing system will be accorded a receipt date, which is the date in Eastern Time when the correspondence is received in the Office regardless of whether that date is a Saturday, Sunday, or Federal holiday within the District of Columbia.

The date indicated on the Certificate of Mailing or of Transmission will be used by the Office only to determine if the paper was deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system within the period for reply. If the paper was actually received in the Office within the period for reply, there is no need to refer to the Certificate. Note however, that 37 CFR 1.6(a)(3) provides that “[c]orrespondence transmitted by facsimile to the Patent and Trademark Office will be stamped with the date on which the complete transmission is received in the Patent and Trademark Office unless that date is a Saturday, Sunday, or Federal holiday within the District of Columbia, in which case the date stamped will be the next succeeding day which is not a Saturday, Sunday, or Federal holiday within the District of Columbia.” Note further that 37 CFR 1.6(a)(4) provides that “[c]orrespondence officially submitted to the Office by way of the USPTO patent electronic filing system will be accorded a receipt date, which is the date in Eastern Time when the correspondence is received in the Office regardless of whether that date is a Saturday, Sunday, or Federal holiday within the District of Columbia.

If, however, the paper was received in the U.S. Patent and Trademark Office after the end of the period for reply, the paper should be inspected to determine if a Certificate of Mailing or of Transmission has been included. Where no such Certificate is found, the paper is untimely since applicant did not reply within the period for reply. This may result in abandonment of the application or other loss of rights.

In those instances where a Certificate of Mailing or of Transmission does appear in the paper or a cover letter thereto, a check should be made to determine whether the indicated date of deposit or transmission is within the period for reply. If the date indicated in the Certificate is after the end of the period for reply, the paper is untimely and no notation of the date need be made. Where the date indicated on the Certificate is within the period for reply, the paper should be considered to be timely filed. A notation should be made adjacent to the Office stamp indicating the date of receipt (“Office Date” Stamp) which notes the date stated on the Certificate. This notation should be “C of Mail”, “C of Fax” or “C of EFS-Web” followed by the date. A paper with a certificate dated November 10, 1997, would be noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”

In those instances where a Certificate of Mailing or of Transmission does appear in the paper or a cover letter thereto, a check should be made to determine whether the indicated date of deposit or transmission is within the period for reply. If the date indicated in the Certificate is after the end of the period for reply, the paper is untimely and no notation of the date need be made. Where the date indicated on the Certificate is within the period for reply, the paper should be considered to be timely filed. A notation should be made adjacent to the Office stamp indicating the date of receipt (“Office Date” Stamp) which notes the date stated on the Certificate. This notation should be “C of Mail”, “C of Fax” or “C of EFS-Web” followed by the date. A paper with a certificate dated November 10, 1997, would be noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”

In those instances where a Certificate of Mailing or of Transmission does appear in the paper or a cover letter thereto, a check should be made to determine whether the indicated date of deposit or transmission is within the period for reply. If the date indicated in the Certificate is after the end of the period for reply, the paper is untimely and no notation of the date need be made. Where the date indicated on the Certificate is within the period for reply, the paper should be considered to be timely filed. A notation should be made adjacent to the Office stamp indicating the date of receipt (“Office Date” Stamp) which notes the date stated on the Certificate. This notation should be “C of Mail”, “C of Fax” or “C of EFS-Web” followed by the date. A paper with a certificate dated November 10, 1997, would be noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”

In those instances where a Certificate of Mailing or of Transmission does appear in the paper or a cover letter thereto, a check should be made to determine whether the indicated date of deposit or transmission is within the period for reply. If the date indicated in the Certificate is after the end of the period for reply, the paper is untimely and no notation of the date need be made. Where the date indicated on the Certificate is within the period for reply, the paper should be considered to be timely filed. A notation should be made adjacent to the Office stamp indicating the date of receipt (“Office Date” Stamp) which notes the date stated on the Certificate. This notation should be “C of Mail”, “C of Fax” or “C of EFS-Web” followed by the date. A paper with a certificate dated November 10, 1997, would be noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”

In those instances where a Certificate of Mailing or of Transmission does appear in the paper or a cover letter thereto, a check should be made to determine whether the indicated date of deposit or transmission is within the period for reply. If the date indicated in the Certificate is after the end of the period for reply, the paper is untimely and no notation of the date need be made. Where the date indicated on the Certificate is within the period for reply, the paper should be considered to be timely filed. A notation should be made adjacent to the Office stamp indicating the date of receipt (“Office Date” Stamp) which notes the date stated on the Certificate. This notation should be “C of Mail”, “C of Fax” or “C of EFS-Web” followed by the date. A paper with a certificate dated November 10, 1997, would be noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”

In those instances where a Certificate of Mailing or of Transmission does appear in the paper or a cover letter thereto, a check should be made to determine whether the indicated date of deposit or transmission is within the period for reply. If the date indicated in the Certificate is after the end of the period for reply, the paper is untimely and no notation of the date need be made. Where the date indicated on the Certificate is within the period for reply, the paper should be considered to be timely filed. A notation should be made adjacent to the Office stamp indicating the date of receipt (“Office Date” Stamp) which notes the date stated on the Certificate. This notation should be “C of Mail”, “C of Fax” or “C of EFS-Web” followed by the date. A paper with a certificate dated November 10, 1997, would be noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”

No benefit will be given to a Certificate of Mailing or Certificate of Facsimile Transmission relative to the filing of a national patent application specification and drawing or other correspondence for the purpose of obtaining an application filing date. A national patent application specification and drawing or other correspondence for the purpose of obtaining a filing date may be filed via the USPTO patent electronic filing system. New patent applications filed in accordance with 37 CFR 1.10 will be stamped by the Office with the date of deposit as Priority Mail Express ® with the United States Postal Service. For example, if a new patent application is deposited as Priority Mail Express ® in accordance with 37 CFR 1.10 on a Saturday and the United States Postal Service gives it a date of deposit of Saturday, the Office will accord and stamp the correspondence with the Saturday date. 37 CFR 1.6(a)(2).

Office personnel receiving a hand-delivered paper from other than U.S. Postal Service personnel should inspect the paper to ensure that the benefits of 37 CFR 1.8 or Priority Mail Express ® benefits under 37 CFR 1.10 are not accorded in error. If the paper contains a certificate of mailing under 37 CFR 1.8 or Priority Mail Express ® mailing label (commonly used to comply with 37 CFR 1.10), the words “HAND DELIVERED” should be written adjacent to the date stamp.

Office personnel receiving a hand-delivered paper from other than U.S. Postal Service personnel should inspect the paper to ensure that the benefits of 37 CFR 1.8 or Priority Mail Express ® benefits under 37 CFR 1.10 are not accorded in error. If the paper contains a certificate of mailing under 37 CFR 1.8 or Priority Mail Express ® mailing label (commonly used to comply with 37 CFR 1.10), the words “HAND DELIVERED” should be written adjacent to the date stamp.

Applicant should be notified in the next Office action when a paper containing a Certificate of Mailing has been denied the benefits under 37 CFR 1.8 or a paper containing an Priority Mail Express ® mailing label (commonly used to comply with 37 CFR 1.10) is denied benefits under 37 CFR 1.10 by including, for example, form paragraph 5.04.

1. This form paragraph is to be used in those situations where correspondence contains a Certificate of Mailing under 37 CFR 1.8 or requests the benefit of Priority Mail Express ® under 37 CFR 1.10, but the correspondence was not actually deposited with the U. S. Postal Service.

Misuse of a Certificate of Mailing under 37 CFR 1.8 or improperly claiming the benefit of 37 CFR 1.10 which appears to be more than a one-time, inadvertent error should be brought to the attention of the Office of Enrollment and Discipline.

37 CFR 1.8(b) permits a party to notify the Office of a previous mailing through the U.S. Postal Service, or transmission by facsimile or the USPTO patent electronic filing system, of correspondence when a reasonable amount of time has elapsed from the time of mailing or transmission of the correspondence. In the event that correspondence may be considered timely filed because it was mailed or transmitted in accordance with 37 CFR 1.8(a), but was not received in the Office after a reasonable amount of time has elapsed, (e.g., more than one month from the time the correspondence was mailed), applicant is not required to wait until the end of the maximum extendable period for reply set in a prior Office action (for the Office to hold the application abandoned) before informing the Office of the previously submitted correspondence. Applicant may notify the Office of the previous mailing or transmission and supply a duplicate copy of the previously mailed or transmitted correspondence and a statement attesting on a personal knowledge basis or to the satisfaction of the Director to the previous timely mailing or transmission. If the person signing the statement did not sign the certificate of mailing or the certificate of transmission, then the person signing the statement should explain how they have firsthand knowledge of the previous timely mailing or transmission. Such a statement should be filed promptly after the person becomes aware that the Office has not received the correspondence.

37 CFR 1.8(b) permits a party to notify the Office of a previous mailing through the U.S. Postal Service, or transmission by facsimile or the USPTO patent electronic filing system, of correspondence when a reasonable amount of time has elapsed from the time of mailing or transmission of the correspondence. In the event that correspondence may be considered timely filed because it was mailed or transmitted in accordance with 37 CFR 1.8(a), but was not received in the Office after a reasonable amount of time has elapsed, (e.g., more than one month from the time the correspondence was mailed), applicant is not required to wait until the end of the maximum extendable period for reply set in a prior Office action (for the Office to hold the application abandoned) before informing the Office of the previously submitted correspondence. Applicant may notify the Office of the previous mailing or transmission and supply a duplicate copy of the previously mailed or transmitted correspondence and a statement attesting on a personal knowledge basis or to the satisfaction of the Director to the previous timely mailing or transmission. If the person signing the statement did not sign the certificate of mailing or the certificate of transmission, then the person signing the statement should explain how they have firsthand knowledge of the previous timely mailing or transmission. Such a statement should be filed promptly after the person becomes aware that the Office has not received the correspondence.

37 CFR 1.8(b) permits a party to notify the Office of a previous mailing through the U.S. Postal Service, or transmission by facsimile or the USPTO patent electronic filing system, of correspondence when a reasonable amount of time has elapsed from the time of mailing or transmission of the correspondence. In the event that correspondence may be considered timely filed because it was mailed or transmitted in accordance with 37 CFR 1.8(a), but was not received in the Office after a reasonable amount of time has elapsed, (e.g., more than one month from the time the correspondence was mailed), applicant is not required to wait until the end of the maximum extendable period for reply set in a prior Office action (for the Office to hold the application abandoned) before informing the Office of the previously submitted correspondence. Applicant may notify the Office of the previous mailing or transmission and supply a duplicate copy of the previously mailed or transmitted correspondence and a statement attesting on a personal knowledge basis or to the satisfaction of the Director to the previous timely mailing or transmission. If the person signing the statement did not sign the certificate of mailing or the certificate of transmission, then the person signing the statement should explain how they have firsthand knowledge of the previous timely mailing or transmission. Such a statement should be filed promptly after the person becomes aware that the Office has not received the correspondence.

37 CFR 1.8(b) permits a party to notify the Office of a previous mailing through the U.S. Postal Service, or transmission by facsimile or the USPTO patent electronic filing system, of correspondence when a reasonable amount of time has elapsed from the time of mailing or transmission of the correspondence. In the event that correspondence may be considered timely filed because it was mailed or transmitted in accordance with 37 CFR 1.8(a), but was not received in the Office after a reasonable amount of time has elapsed, (e.g., more than one month from the time the correspondence was mailed), applicant is not required to wait until the end of the maximum extendable period for reply set in a prior Office action (for the Office to hold the application abandoned) before informing the Office of the previously submitted correspondence. Applicant may notify the Office of the previous mailing or transmission and supply a duplicate copy of the previously mailed or transmitted correspondence and a statement attesting on a personal knowledge basis or to the satisfaction of the Director to the previous timely mailing or transmission. If the person signing the statement did not sign the certificate of mailing or the certificate of transmission, then the person signing the statement should explain how they have firsthand knowledge of the previous timely mailing or transmission. Such a statement should be filed promptly after the person becomes aware that the Office has not received the correspondence.

37 CFR 1.8(b) permits a party to notify the Office of a previous mailing through the U.S. Postal Service, or transmission by facsimile or the USPTO patent electronic filing system, of correspondence when a reasonable amount of time has elapsed from the time of mailing or transmission of the correspondence. In the event that correspondence may be considered timely filed because it was mailed or transmitted in accordance with 37 CFR 1.8(a), but was not received in the Office after a reasonable amount of time has elapsed, (e.g., more than one month from the time the correspondence was mailed), applicant is not required to wait until the end of the maximum extendable period for reply set in a prior Office action (for the Office to hold the application abandoned) before informing the Office of the previously submitted correspondence. Applicant may notify the Office of the previous mailing or transmission and supply a duplicate copy of the previously mailed or transmitted correspondence and a statement attesting on a personal knowledge basis or to the satisfaction of the Director to the previous timely mailing or transmission. If the person signing the statement did not sign the certificate of mailing or the certificate of transmission, then the person signing the statement should explain how they have firsthand knowledge of the previous timely mailing or transmission. Such a statement should be filed promptly after the person becomes aware that the Office has not received the correspondence.

The Certificate of Transmission procedure for both facsimile transmissions and transmissions via the USPTO patent electronic filing system, however, also applies to papers transmitted to the Office from a foreign country provided that the correspondence being transmitted is not prohibited from being transmitted by facsimile or via the USPTO patent electronic filing system and is not otherwise precluded from receiving the benefits under 37 CFR 1.8.

Alternatively, the correspondence may be submitted with a cover or transmittal letter that itemizes and properly identifies the papers and on which is placed the certificate under 37 CFR 1.8.

If the period set for taking an action in the U.S. Patent and Trademark Office ends on a Saturday, Sunday, or federal holiday within the District of Columbia (37 CFR 1.7), the action will be considered to be timely if deposited in the United States mail, transmitted by facsimile or transmitted by the USPTO patent electronic filing system and certified under 37 CFR 1.8(a) on the next succeeding day which is not a Saturday, Sunday, or a Federal holiday.

Paragraphs (b) and (c) of 37 CFR 1.8 concern the situation where a paper containing a Certificate was timely deposited in the U.S. Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system, but never received by the U.S. Patent and Trademark Office. In the TCs, all submissions under these paragraphs should be forwarded to the Office of Petitions to be considered.

Paragraphs (b) and (c) of 37 CFR 1.8 concern the situation where a paper containing a Certificate was timely deposited in the U.S. Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system, but never received by the U.S. Patent and Trademark Office. In the TCs, all submissions under these paragraphs should be forwarded to the Office of Petitions to be considered.

It should be noted, however, that the Office will continue its normal practice of stamping the date of receipt (“Office Date” Stamp; see MPEP § 505) on all papers received through the mail, by facsimile or via the USPTO patent electronic filing system except those filed under 37 CFR 1.10 (See MPEP § 513). The receipt date stamped on all papers will also be the date which is entered on Office records and from which any subsequent periods are calculated. For example, 37 CFR 41.37 gives an appellant 2 months from the receipt date of the notice of appeal to file an appeal brief. If the last day to reply to a final Office action was November 10, 2014, and applicant deposited a Notice of Appeal with fee in the U.S. mail on November 10, 2014, and so certified, that appeal is timely even if it was not received in the U.S. Patent and Trademark Office until November 12, 2014. Since the date of receipt of the notice of appeal will be used to calculate the time at which the brief is due, the brief was due on January 12, 2015. This is 2 months after the date of receipt of the notice of appeal.

It should be noted, however, that the Office will continue its normal practice of stamping the date of receipt (“Office Date” Stamp; see MPEP § 505) on all papers received through the mail, by facsimile or via the USPTO patent electronic filing system except those filed under 37 CFR 1.10 (See MPEP § 513). The receipt date stamped on all papers will also be the date which is entered on Office records and from which any subsequent periods are calculated. For example, 37 CFR 41.37 gives an appellant 2 months from the receipt date of the notice of appeal to file an appeal brief. If the last day to reply to a final Office action was November 10, 2014, and applicant deposited a Notice of Appeal with fee in the U.S. mail on November 10, 2014, and so certified, that appeal is timely even if it was not received in the U.S. Patent and Trademark Office until November 12, 2014. Since the date of receipt of the notice of appeal will be used to calculate the time at which the brief is due, the brief was due on January 12, 2015. This is 2 months after the date of receipt of the notice of appeal.

It should be noted, however, that the Office will continue its normal practice of stamping the date of receipt (“Office Date” Stamp; see MPEP § 505) on all papers received through the mail, by facsimile or via the USPTO patent electronic filing system except those filed under 37 CFR 1.10 (See MPEP § 513). The receipt date stamped on all papers will also be the date which is entered on Office records and from which any subsequent periods are calculated. For example, 37 CFR 41.37 gives an appellant 2 months from the receipt date of the notice of appeal to file an appeal brief. If the last day to reply to a final Office action was November 10, 2014, and applicant deposited a Notice of Appeal with fee in the U.S. mail on November 10, 2014, and so certified, that appeal is timely even if it was not received in the U.S. Patent and Trademark Office until November 12, 2014. Since the date of receipt of the notice of appeal will be used to calculate the time at which the brief is due, the brief was due on January 12, 2015. This is 2 months after the date of receipt of the notice of appeal.

(C) When the certification is presented on a separate sheet, that sheet must (1) be signed and (2) fully identify and be securely attached to the paper it accompanies. The required identification should include the application number and filing date of the application as well as the type of paper being filed, e.g., reply to rejection or refusal, Notice of Appeal, etc. An unsigned certification will not be considered acceptable.

• Moreover, without the proper identifying data, a certification presented on a separate sheet will not be considered acceptable if there is any question or doubt concerning the connection between the sheet and the paper filed.
• For submissions by the U.S. Postal Service or facsimile transmissions, if the sheet should become detached from the paper and thereafter not associated with the appropriate file, evidence that this sheet was received in the Office can be supported by submitting a copy of a postcard receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally mailed. Attention is directed to MPEP § 503 relative to the use of postcards as receipts. For submissions via the USPTO patent electronic filing system, evidence that this sheet was received in the Office can be supported by submitting a copy of an electronic acknowledgement receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally submitted. See MPEP §§ 502.05 and 503.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
…
(E) In situations wherein the correspondence includes several papers directed to the same area of the Office for the same application (for example, a proposed reply under 37 CFR 1.116 and a Notice of Appeal), each paper should have its own certification as a part thereof or attached thereto.

Under 37 CFR 1.8, a person may state on certain papers directed to the Office (some exceptions are stated in 37 CFR 1.8), the date on which the paper will be deposited in the United States Postal Service, transmitted by facsimile or transmitted via the USPTO patent electronic filing system. If the date stated is within the period for reply, the reply in most instances will be considered to be timely. This is true even if the paper does not actually reach the Office until after the end of the period for reply. The Certificate of Mailing procedure does not apply to papers mailed in a foreign country.

It should be noted, however, that the Office will continue its normal practice of stamping the date of receipt (“Office Date” Stamp; see MPEP § 505) on all papers received through the mail, by facsimile or via the USPTO patent electronic filing system except those filed under 37 CFR 1.10 (See MPEP § 513). The receipt date stamped on all papers will also be the date which is entered on Office records and from which any subsequent periods are calculated. For example, 37 CFR 41.37 gives an appellant 2 months from the receipt date of the notice of appeal to file an appeal brief. If the last day to reply to a final Office action was November 10, 2014, and applicant deposited a Notice of Appeal with fee in the U.S. mail on November 10, 2014, and so certified, that appeal is timely even if it was not received in the U.S. Patent and Trademark Office until November 12, 2014. Since the date of receipt of the notice of appeal will be used to calculate the time at which the brief is due, the brief was due on January 12, 2015. This is 2 months after the date of receipt of the notice of appeal.

However, the benefits of 37 CFR 1.8 or 37 CFR 1.10 apply only to documents delivered to the Office by the U.S. Postal Service. A number of instances have been uncovered where individuals are certifying that documents were deposited with the U.S. Postal Service when, in fact, the documents were hand-carried or delivered to the Office via commercial couriers, e.g., “Federal Express,” “DHL,” “Purolator,” “Air Borne,” or “UPS.” In those instances where documents include a Certificate of Mailing under 37 CFR 1.8 or Priority Mail Express ® mailing label (commonly used to comply with 37 CFR 1.10) but were delivered to the Office by other than the U.S. Postal Service, (OPAP) personnel are placing a notice indicating that fact on the correspondence involved to alert Office personnel that the benefits of 37 CFR 1.8 or 37 CFR 1.10 do not apply.

All Certificates of Mailing or Transmission filed in applications should be placed in the image file wrappers.

(a) Except in the situations enumerated in paragraph (a)(2) of this section or as otherwise expressly excluded in this chapter, correspondence required to be filed in the U.S. Patent and Trademark Office within a set period of time will be considered as being timely filed if the procedure described in this section is followed. The actual date of receipt will be used for all other purposes.
(1) Correspondence will be considered as being timely filed if:
…
(ii) The correspondence includes a certificate for each piece of correspondence stating the date of deposit or transmission.

No benefit will be given to a Certificate of Mailing or Certificate of Facsimile Transmission relative to the filing of a national patent application specification and drawing or other correspondence for the purpose of obtaining an application filing date. A national patent application specification and drawing or other correspondence for the purpose of obtaining a filing date may be filed via the USPTO patent electronic filing system. New patent applications filed in accordance with 37 CFR 1.10 will be stamped by the Office with the date of deposit as Priority Mail Express ® with the United States Postal Service. For example, if a new patent application is deposited as Priority Mail Express ® in accordance with 37 CFR 1.10 on a Saturday and the United States Postal Service gives it a date of deposit of Saturday, the Office will accord and stamp the correspondence with the Saturday date. 37 CFR 1.6(a)(2).

No benefit will be given to a Certificate of Mailing or Certificate of Facsimile Transmission relative to the filing of a national patent application specification and drawing or other correspondence for the purpose of obtaining an application filing date. A national patent application specification and drawing or other correspondence for the purpose of obtaining a filing date may be filed via the USPTO patent electronic filing system. New patent applications filed in accordance with 37 CFR 1.10 will be stamped by the Office with the date of deposit as Priority Mail Express ® with the United States Postal Service. For example, if a new patent application is deposited as Priority Mail Express ® in accordance with 37 CFR 1.10 on a Saturday and the United States Postal Service gives it a date of deposit of Saturday, the Office will accord and stamp the correspondence with the Saturday date. 37 CFR 1.6(a)(2).

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
(C) When the certification is presented on a separate sheet, that sheet must (1) be signed and (2) fully identify and be securely attached to the paper it accompanies. The required identification should include the application number and filing date of the application as well as the type of paper being filed, e.g., reply to rejection or refusal, Notice of Appeal, etc. An unsigned certification will not be considered acceptable. For submissions by the U.S. Postal Service or facsimile transmissions, if the sheet should become detached from the paper and thereafter not associated with the appropriate file, evidence that this sheet was received in the Office can be supported by submitting a copy of a postcard receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally mailed. Attention is directed to MPEP § 503 relative to the use of postcards as receipts. For submissions via the USPTO patent electronic filing system, evidence that this sheet was received in the Office can be supported by submitting a copy of an electronic acknowledgement receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally submitted. See MPEP §§ 502.05 and 503.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
(C) When the certification is presented on a separate sheet, that sheet must (1) be signed and (2) fully identify and be securely attached to the paper it accompanies. The required identification should include the application number and filing date of the application as well as the type of paper being filed, e.g., reply to rejection or refusal, Notice of Appeal, etc. An unsigned certification will not be considered acceptable. For submissions by the U.S. Postal Service or facsimile transmissions, if the sheet should become detached from the paper and thereafter not associated with the appropriate file, evidence that this sheet was received in the Office can be supported by submitting a copy of a postcard receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally mailed. Attention is directed to MPEP § 503 relative to the use of postcards as receipts. For submissions via the USPTO patent electronic filing system, evidence that this sheet was received in the Office can be supported by submitting a copy of an electronic acknowledgement receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally submitted. See MPEP §§ 502.05 and 503.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
(C) When the certification is presented on a separate sheet, that sheet must (1) be signed and (2) fully identify and be securely attached to the paper it accompanies. The required identification should include the application number and filing date of the application as well as the type of paper being filed, e.g., reply to rejection or refusal, Notice of Appeal, etc. An unsigned certification will not be considered acceptable. For submissions by the U.S. Postal Service or facsimile transmissions, if the sheet should become detached from the paper and thereafter not associated with the appropriate file, evidence that this sheet was received in the Office can be supported by submitting a copy of a postcard receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally mailed. Attention is directed to MPEP § 503 relative to the use of postcards as receipts. For submissions via the USPTO patent electronic filing system, evidence that this sheet was received in the Office can be supported by submitting a copy of an electronic acknowledgement receipt specifically identifying this sheet and the paper and by submitting a copy of the sheet as originally submitted. See MPEP §§ 502.05 and 503.

(a) Except in the situations enumerated in paragraph (a)(2) of this section or as otherwise expressly excluded in this chapter, correspondence required to be filed in the U.S. Patent and Trademark Office within a set period of time will be considered as being timely filed if the procedure described in this section is followed. The actual date of receipt will be used for all other purposes.

• (1) Correspondence will be considered as being timely filed if:
  • (i) The correspondence is mailed or transmitted prior to expiration of the set period of time by being:
    • (A) Addressed as set out in § 1.1(a) and deposited with the U.S. Postal Service with sufficient postage as first class mail; or
    • (B) Transmitted by facsimile to the Patent and Trademark Office in accordance with § 1.6(d); or
    • (C) Transmitted via the USPTO patent electronic filing system in accordance with § 1.6(a)(4); and
  • (ii) The correspondence includes a certificate for each piece of correspondence stating the date of deposit or transmission. The person signing the certificate should have reasonable basis to expect that the correspondence would be mailed or transmitted on or before the date indicated.
• (2) The procedure described in paragraph (a)(1) of this section does not apply to, and no benefit will be given to a Certificate of Mailing or Transmission on, the following:
  • (i) Relative to Patents and Patent Applications—
    • (A) The filing of a national patent application specification and drawing or other correspondence for the purpose of obtaining an application filing date, including a request for a continued prosecution application under § 1.53(d);
    • (B) Papers filed in trials before the Patent Trial and Appeal Board, which are governed by § 42.6(b) of this title;
    • (C) Papers filed in contested cases before the Patent Trial and Appeal Board, which are governed by § 41.106(f) of this title;
    • (D) The filing of an international application for patent;
    • (E) The filing of correspondence in an international application before the U.S. Receiving Office, the U.S. International Searching Authority, or the U.S. International Preliminary Examining Authority;
    • (F) The filing of a copy of the international application and the basic national fee necessary to enter the national stage, as specified in § 1.495(b).
    • (G) The filing of a written declaration of abandonment under § 1.138;
    • (H) The filing of a submission under § 1.217 for publication of a redacted copy of an application;
    • (I) The filing of a third-party submission under § 1.290;
    • (J) The calculation of any period of adjustment, as specified in § 1.703(f);
    • (K) The filing of an international design application.
  • (ii) [Reserved]
  • (iii) Relative to Disciplinary Proceedings—
    • (A) Correspondence filed in connection with a disciplinary proceeding under part 11 of this chapter.
    • (B) [Reserved]

(b) In the event that correspondence is considered timely filed by being mailed or transmitted in accordance with paragraph (a) of this section, but not received in the U.S. Patent and Trademark Office after a reasonable amount of time has elapsed from the time of mailing or transmitting of the correspondence, or after the application is held to be abandoned, or after the proceeding is dismissed or decided with prejudice, or the prosecution of a reexamination proceeding is terminated pursuant to § 1.550(d) or § 1.957(b) or limited pursuant to § 1.957(c), or a requester paper is refused consideration pursuant to § 1.957(a), the correspondence will be considered timely if the party who forwarded such correspondence:

• (1) Informs the Office of the previous mailing or transmission of the correspondence promptly after becoming aware that the Office has no evidence of receipt of the correspondence;
• (2) Supplies an additional copy of the previously mailed or transmitted correspondence and certificate; and
• (3) Includes a statement that attests on a personal knowledge basis or to the satisfaction of the Director to the previous timely mailing, transmission or submission. If the correspondence was sent by facsimile transmission, a copy of the sending unit’s report confirming transmission may be used to support this statement. If the correspondence was transmitted via the USPTO patent electronic filing system, a copy of an acknowledgment receipt generated by the Office electronic filing system confirming submission may be used to support this statement.

It should be noted, however, that the Office will continue its normal practice of stamping the date of receipt (“Office Date” Stamp; see MPEP § 505) on all papers received through the mail, by facsimile or via the USPTO patent electronic filing system except those filed under 37 CFR 1.10 (See MPEP § 513). The receipt date stamped on all papers will also be the date which is entered on Office records and from which any subsequent periods are calculated. For example, 37 CFR 41.37 gives an appellant 2 months from the receipt date of the notice of appeal to file an appeal brief. If the last day to reply to a final Office action was November 10, 2014, and applicant deposited a Notice of Appeal with fee in the U.S. mail on November 10, 2014, and so certified, that appeal is timely even if it was not received in the U.S. Patent and Trademark Office until November 12, 2014. Since the date of receipt of the notice of appeal will be used to calculate the time at which the brief is due, the brief was due on January 12, 2015. This is 2 months after the date of receipt of the notice of appeal.

37 CFR 1.8(a)(2)(i)(A) specifically refers to a request for a continued prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for design applications) as a correspondence filed for the purposes of obtaining an application filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to a request for a CPA. The date on a certificate of mailing or transmission (37 CFR 1.8(a)) of a CPA is not controlling or even relevant. A CPA filed by facsimile transmission or via the USPTO patent electronic filing system will not be accorded a filing date as of the date on the certificate of transmission unless Office records indicate, or applicant otherwise establishes pursuant to 37 CFR 1.6(f), receipt in the Office of the complete CPA on the date on the certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday within the District of Columbia (for transmission via the USPTO patent electronic filing system, that date can be a Saturday, Sunday, or Federal holiday within the District of Columbia).
(D) In situations wherein the correspondence includes papers for more than one application (e.g., a single envelope containing separate papers responding to Office actions in different applications) or papers for various parts of the Office (e.g., a patent issue fee transmittal form PTOL-85B and an assignment), each paper must have its own certification as a part thereof or attached thereto. Although Part B of Form PTOL-85, Notice of Allowance and Fee(s) Due, may contain a Certificate of Mailing thereon, a separate Certificate of Mailing is required for all papers included with this form, including replacement drawings. Checks submitted with the papers do not require certification.

(D) In situations wherein the correspondence includes papers for more than one application (e.g., a single envelope containing separate papers responding to Office actions in different applications) or papers for various parts of the Office (e.g., a patent issue fee transmittal form PTOL-85B and an assignment), each paper must have its own certification as a part thereof or attached thereto.

• Although Part B of Form PTOL-85, Notice of Allowance and Fee(s) Due, may contain a Certificate of Mailing thereon, a separate Certificate of Mailing is required for all papers included with this form, including replacement drawings. Checks submitted with the papers do not require certification.

When papers are received in a specific location of the Office (e.g., Pre-Grant Publication Division, Office of Data Management, Office of Petitions – see MPEP §§ 502 and 502.01), the date of receipt in the Office is stamped on the papers in accordance with 37 CFR 1.6(a).

It should be noted that the filing of a paper for the purpose of obtaining a continuation or division application under 37 CFR 1.53(d) (available only for design applications) is excluded from the Certificate practice under 37 CFR 1.8(a)(2)(i)(A) since it is considered to be the filing of a national patent application.

Pursuant to 35 U.S.C. 119(e)(3), the period of pendency of a provisional application is extended to the next succeeding business day if the day that is 12 months after the filing date of a provisional application falls on a Saturday, Sunday, or Federal holiday within the District of Columbia. See also 37 CFR 1.7(b).

No benefit will be given to a Certificate of Mailing or Certificate of Facsimile Transmission relative to the filing of a national patent application specification and drawing or other correspondence for the purpose of obtaining an application filing date. A national patent application specification and drawing or other correspondence for the purpose of obtaining a filing date may be filed via the USPTO patent electronic filing system. New patent applications filed in accordance with 37 CFR 1.10 will be stamped by the Office with the date of deposit as Priority Mail Express ® with the United States Postal Service. For example, if a new patent application is deposited as Priority Mail Express ® in accordance with 37 CFR 1.10 on a Saturday and the United States Postal Service gives it a date of deposit of Saturday, the Office will accord and stamp the correspondence with the Saturday date. 37 CFR 1.6(a)(2).