Patent Law FAQ

Claiming priority and claiming benefit are two different mechanisms in patent law, though both can affect the effective filing date of a patent application:

1. Claiming Priority:
   • Typically refers to claiming the right of priority to a foreign application under 35 U.S.C. 119(a)-(d) and (f)
   • Also includes priority claims to provisional applications under 35 U.S.C. 119(e)
   • Governed by 37 CFR 1.55 for foreign priority claims
2. Claiming Benefit:
   • Refers to claiming the benefit of an earlier filing date of a U.S. application under 35 U.S.C. 120, 121, 365(c), or 386(c)
   • Typically used for continuation, divisional, or continuation-in-part applications
   • Governed by 37 CFR 1.78

The MPEP discusses both types of claims: “Under certain conditions and on fulfilling certain requirements, a later-filed application for patent filed in the United States may claim the benefit of, or priority to, a prior application filed in the United States (see 35 U.S.C. 119(e), 120, 121, 365(c), and 386(c); see also 37 CFR 1.78) or in a foreign country (see 35 U.S.C. 119(a)-(d) and (f), 365(a) and (b), and 386(a) and (b); see also 37 CFR 1.55).”

Cross-noting in patent applications refers to the process of recording and verifying information about prior applications, including U.S. and foreign applications, for which benefit or priority is claimed. This information is typically noted on the bibliographic data (bib-data) sheet of the application and is used to ensure accurate representation of priority claims on the front page of a printed patent.

According to MPEP 202, “The front page of a printed patent identifies all prior applications for which benefits are claimed under 35 U.S.C. 119(e), 120, 121, 365(c), or 386(c) in continuation-in-part, continuation, divisional, and reissue applications.”

The effective filing date for a claimed invention is determined as follows:

• The actual filing date of the application containing the claim, or
• The filing date of the earliest application for which the patent or application is entitled to claim priority or benefit

The MPEP cites 35 U.S.C. 100(i)(1): “the effective filing date for a claimed invention in a patent or application (except in an application for reissue or reissued patent) is set forth in 35 U.S.C. 100(i)(1) as: (A) if subparagraph (B) does not apply, the actual filing date of the patent or the application for the patent containing a claim to the invention; or (B) the filing date of the earliest application for which the patent or application is entitled, as to such invention, to a right of priority under section 119, 365(a), 365(b), 386(a), or 386(b) or to the benefit of an earlier filing date under section 120, 121, 365(c), or 386(c).” (MPEP 210)

Cross-noting in patent applications refers to the process of recording and verifying information about prior applications, including U.S. and foreign applications, for which benefit or priority is claimed. This information is typically noted on the bibliographic data (bib-data) sheet of the application and is used to ensure accurate representation of priority claims on the front page of a printed patent.

According to MPEP 202, “The front page of a printed patent identifies all prior applications for which benefits are claimed under 35 U.S.C. 119(e), 120, 121, 365(c), or 386(c) in continuation-in-part, continuation, divisional, and reissue applications.”

Claiming priority and claiming benefit are two different mechanisms in patent law, though both can affect the effective filing date of a patent application:

1. Claiming Priority:
   • Typically refers to claiming the right of priority to a foreign application under 35 U.S.C. 119(a)-(d) and (f)
   • Also includes priority claims to provisional applications under 35 U.S.C. 119(e)
   • Governed by 37 CFR 1.55 for foreign priority claims
2. Claiming Benefit:
   • Refers to claiming the benefit of an earlier filing date of a U.S. application under 35 U.S.C. 120, 121, 365(c), or 386(c)
   • Typically used for continuation, divisional, or continuation-in-part applications
   • Governed by 37 CFR 1.78

The MPEP discusses both types of claims: “Under certain conditions and on fulfilling certain requirements, a later-filed application for patent filed in the United States may claim the benefit of, or priority to, a prior application filed in the United States (see 35 U.S.C. 119(e), 120, 121, 365(c), and 386(c); see also 37 CFR 1.78) or in a foreign country (see 35 U.S.C. 119(a)-(d) and (f), 365(a) and (b), and 386(a) and (b); see also 37 CFR 1.55).”

Cross-noting in patent applications refers to the process of recording and verifying information about prior applications, including U.S. and foreign applications, for which benefit or priority is claimed. This information is typically noted on the bibliographic data (bib-data) sheet of the application and is used to ensure accurate representation of priority claims on the front page of a printed patent.

According to MPEP 202, “The front page of a printed patent identifies all prior applications for which benefits are claimed under 35 U.S.C. 119(e), 120, 121, 365(c), or 386(c) in continuation-in-part, continuation, divisional, and reissue applications.”

The effective filing date for a claimed invention is determined as follows:

• The actual filing date of the application containing the claim, or
• The filing date of the earliest application for which the patent or application is entitled to claim priority or benefit

The MPEP cites 35 U.S.C. 100(i)(1): “the effective filing date for a claimed invention in a patent or application (except in an application for reissue or reissued patent) is set forth in 35 U.S.C. 100(i)(1) as: (A) if subparagraph (B) does not apply, the actual filing date of the patent or the application for the patent containing a claim to the invention; or (B) the filing date of the earliest application for which the patent or application is entitled, as to such invention, to a right of priority under section 119, 365(a), 365(b), 386(a), or 386(b) or to the benefit of an earlier filing date under section 120, 121, 365(c), or 386(c).” (MPEP 210)

Claiming priority and claiming benefit are two different mechanisms in patent law, though both can affect the effective filing date of a patent application:

1. Claiming Priority:
   • Typically refers to claiming the right of priority to a foreign application under 35 U.S.C. 119(a)-(d) and (f)
   • Also includes priority claims to provisional applications under 35 U.S.C. 119(e)
   • Governed by 37 CFR 1.55 for foreign priority claims
2. Claiming Benefit:
   • Refers to claiming the benefit of an earlier filing date of a U.S. application under 35 U.S.C. 120, 121, 365(c), or 386(c)
   • Typically used for continuation, divisional, or continuation-in-part applications
   • Governed by 37 CFR 1.78

The MPEP discusses both types of claims: “Under certain conditions and on fulfilling certain requirements, a later-filed application for patent filed in the United States may claim the benefit of, or priority to, a prior application filed in the United States (see 35 U.S.C. 119(e), 120, 121, 365(c), and 386(c); see also 37 CFR 1.78) or in a foreign country (see 35 U.S.C. 119(a)-(d) and (f), 365(a) and (b), and 386(a) and (b); see also 37 CFR 1.55).”

Cross-noting in patent applications refers to the process of recording and verifying information about prior applications, including U.S. and foreign applications, for which benefit or priority is claimed. This information is typically noted on the bibliographic data (bib-data) sheet of the application and is used to ensure accurate representation of priority claims on the front page of a printed patent.

According to MPEP 202, “The front page of a printed patent identifies all prior applications for which benefits are claimed under 35 U.S.C. 119(e), 120, 121, 365(c), or 386(c) in continuation-in-part, continuation, divisional, and reissue applications.”

The effective filing date for a claimed invention is determined as follows:

• The actual filing date of the application containing the claim, or
• The filing date of the earliest application for which the patent or application is entitled to claim priority or benefit

The MPEP cites 35 U.S.C. 100(i)(1): “the effective filing date for a claimed invention in a patent or application (except in an application for reissue or reissued patent) is set forth in 35 U.S.C. 100(i)(1) as: (A) if subparagraph (B) does not apply, the actual filing date of the patent or the application for the patent containing a claim to the invention; or (B) the filing date of the earliest application for which the patent or application is entitled, as to such invention, to a right of priority under section 119, 365(a), 365(b), 386(a), or 386(b) or to the benefit of an earlier filing date under section 120, 121, 365(c), or 386(c).” (MPEP 210)