MPEP § 710.01(a) — Statutory Period, How Computed (Annotated Rules)

§710.01(a) Statutory Period, How Computed

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 710.01(a), including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Statutory Period, How Computed

This section addresses Statutory Period, How Computed. Contains: 1 guidance statement, 5 permissions, and 3 other statements.

Key Rules

Topic

Reply Period and Extensions

5 rules
MPEP GuidancePermittedAlways
[mpep-710-01-a-711ab2809fffca142d5d25f2]
Reply to Office Action Due Dates
Note:
Describes the due dates for replies to Office actions with a 3-month shortened statutory period, considering leap years.

For example, reply to an Office action with a 3-month shortened statutory period dated November 30 is due on the following February 28 (or 29 if it is a leap year), while a reply to an Office action dated February 28 is due on May 28 and not on the last day of May. Ex parte Messick, 7 USPQ 57 (Comm’r Pat. 1930).

Jump to MPEP SourceReply Period and ExtensionsResponse to Office Action Requirements (37 CFR 1.111)Shortened Statutory Period
MPEP GuidanceInformativeAlways
[mpep-710-01-a-7bebe0a5fd6152eea48464a2]
1-Month Extension Extends Reply Date to Following Month
Note:
A 1-month extension of time for reply moves the due date to the corresponding day in the following month, regardless of holidays or weekends.

A 1-month extension of time extends the time for reply to the date corresponding to the Office action date in the following month. For example, a reply to an Office action mailed on January 31 with a 3-month shortened statutory period would be due on April 30. If a 1-month extension of time were given, the reply would be due by May 31. The fact that April 30 may have been a Saturday, Sunday, or federal holiday has no effect on the extension of time. Where the period for reply is extended by some time period other than “1-month” or an even multiple thereof, the person granting the extension should indicate the date upon which the extended period for reply will expire.

Jump to MPEP SourceReply Period and ExtensionsResponse to Office Action Requirements (37 CFR 1.111)Office Actions and Responses
MPEP GuidanceInformativeAlways
[mpep-710-01-a-b8c65e45ac20d5626c5a6216]
Extension of Reply Time for Office Action
Note:
Provides the date by which a reply to an Office action with a shortened statutory period must be submitted, considering extensions.

A 1-month extension of time extends the time for reply to the date corresponding to the Office action date in the following month. For example, a reply to an Office action mailed on January 31 with a 3-month shortened statutory period would be due on April 30. If a 1-month extension of time were given, the reply would be due by May 31. The fact that April 30 may have been a Saturday, Sunday, or federal holiday has no effect on the extension of time. Where the period for reply is extended by some time period other than “1-month” or an even multiple thereof, the person granting the extension should indicate the date upon which the extended period for reply will expire.

Jump to MPEP SourceReply Period and ExtensionsResponse to Office Action Requirements (37 CFR 1.111)Shortened Statutory Period
MPEP GuidancePermittedAlways
[mpep-710-01-a-2b91020d1851a71635371028]
1-Month Reply Extension Due by May 31
Note:
If a 1-month extension is given, the reply to an Office action dated in January must be submitted by May 31.

A 1-month extension of time extends the time for reply to the date corresponding to the Office action date in the following month. For example, a reply to an Office action mailed on January 31 with a 3-month shortened statutory period would be due on April 30. If a 1-month extension of time were given, the reply would be due by May 31. The fact that April 30 may have been a Saturday, Sunday, or federal holiday has no effect on the extension of time. Where the period for reply is extended by some time period other than “1-month” or an even multiple thereof, the person granting the extension should indicate the date upon which the extended period for reply will expire.

Jump to MPEP SourceReply Period and ExtensionsResponse to Office Action Requirements (37 CFR 1.111)Office Actions and Responses
MPEP GuidanceRecommendedAlways
[mpep-710-01-a-c1d53afe29bf200979fc6ce2]
Indicate Expiration Date for Non-1 Month Extensions
Note:
When extending the reply period by a time other than 1 month, specify the exact date when the extended period expires.

A 1-month extension of time extends the time for reply to the date corresponding to the Office action date in the following month. For example, a reply to an Office action mailed on January 31 with a 3-month shortened statutory period would be due on April 30. If a 1-month extension of time were given, the reply would be due by May 31. The fact that April 30 may have been a Saturday, Sunday, or federal holiday has no effect on the extension of time. Where the period for reply is extended by some time period other than “1-month” or an even multiple thereof, the person granting the extension should indicate the date upon which the extended period for reply will expire.

Jump to MPEP SourceReply Period and ExtensionsResponse to Office Action Requirements (37 CFR 1.111)Office Actions and Responses
Topic

Weekend and Holiday Rules

2 rules
MPEP GuidancePermittedAlways
[mpep-710-01-a-ae8e72d905213d325e3354d8]
Application Abandoned on June 1 if No Reply by May 31
Note:
If no timely reply is filed by May 31 (a business day) and no extensions are obtained, the application will be abandoned as of June 1.

When a timely reply is ultimately not filed, the application is regarded as abandoned after midnight of the date the period for reply expired. In the above example where May 31 is not a Saturday, Sunday, or federal holiday and no further extensions of time are obtained prior to the end of the 6-month statutory period, the application would be abandoned as of June 1. The fact that June 1 may be a Saturday, Sunday, or federal holiday does not change the abandonment date since the reply was due on May 31, a business day. See MPEP § 711.04(a) for guidance on the date of abandonment, including examples.

Jump to MPEP SourceWeekend and Holiday RulesStatutory Period Computation (37 CFR 1.134)Period for Reply (37 CFR 1.134)
MPEP GuidancePermittedAlways
[mpep-710-01-a-9eae133bc897fd281b43b9b4]
Abandonment Date Regardless of Holiday
Note:
The application abandonment date is May 31, regardless if June 1 falls on a weekend or holiday.

When a timely reply is ultimately not filed, the application is regarded as abandoned after midnight of the date the period for reply expired. In the above example where May 31 is not a Saturday, Sunday, or federal holiday and no further extensions of time are obtained prior to the end of the 6-month statutory period, the application would be abandoned as of June 1. The fact that June 1 may be a Saturday, Sunday, or federal holiday does not change the abandonment date since the reply was due on May 31, a business day. See MPEP § 711.04(a) for guidance on the date of abandonment, including examples.

Jump to MPEP SourceWeekend and Holiday RulesStatutory Period Computation (37 CFR 1.134)Period for Reply (37 CFR 1.134)
Topic

Period Calculation

1 rules
MPEP GuidancePermittedAlways
[mpep-710-01-a-bf3c4959e8a2d3265377b1b2]
Extension Not Affected by Holiday
Note:
An extension of time for reply is not impacted if the due date falls on a Saturday, Sunday, or federal holiday.

A 1-month extension of time extends the time for reply to the date corresponding to the Office action date in the following month. For example, a reply to an Office action mailed on January 31 with a 3-month shortened statutory period would be due on April 30. If a 1-month extension of time were given, the reply would be due by May 31. The fact that April 30 may have been a Saturday, Sunday, or federal holiday has no effect on the extension of time. Where the period for reply is extended by some time period other than “1-month” or an even multiple thereof, the person granting the extension should indicate the date upon which the extended period for reply will expire.

Jump to MPEP SourcePeriod CalculationReply Period and ExtensionsWeekend and Holiday Rules
Topic

Period for Reply (37 CFR 1.134)

1 rules
MPEP GuidanceInformativeAlways
[mpep-710-01-a-ac4bcb2fc7c398f2f99bbe5a]
Application Abandoned After Midnight If Timely Reply Not Filed
Note:
If a timely reply is not filed by the deadline, the application will be considered abandoned after midnight on the due date.

When a timely reply is ultimately not filed, the application is regarded as abandoned after midnight of the date the period for reply expired. In the above example where May 31 is not a Saturday, Sunday, or federal holiday and no further extensions of time are obtained prior to the end of the 6-month statutory period, the application would be abandoned as of June 1. The fact that June 1 may be a Saturday, Sunday, or federal holiday does not change the abandonment date since the reply was due on May 31, a business day. See MPEP § 711.04(a) for guidance on the date of abandonment, including examples.

Jump to MPEP SourcePeriod for Reply (37 CFR 1.134)Weekend and Holiday RulesStatutory Period Computation (37 CFR 1.134)
Topic

Types of Office Actions

1 rules
MPEP GuidanceInformativeAlways
[mpep-710-01-a-7cb330b3d3ef0e92b74d6ed6]
Statutory Reply Period Not Always Determined by Office Action
Note:
In some cases, the examiner’s Office action does not start the statutory reply period. A statement indicating this should be included when the period runs from a previous action.

In some cases the examiner’s Office action does not determine the beginning of a statutory reply period. In all cases where the statutory reply period runs from the date of a previous action, a statement to that effect should be included.

Jump to MPEP SourceTypes of Office ActionsResponse to Office Action Requirements (37 CFR 1.111)Examiner's Action (37 CFR 1.104)
Topic

Response to Office Action Requirements (37 CFR 1.111)

1 rules
MPEP GuidanceRecommendedAlways
[mpep-710-01-a-a7937b63e6e3ef4f71bd79aa]
Requirement for Including Statutory Reply Period from Previous Action
Note:
The rule requires including a statement that the statutory reply period runs from the date of a previous action in all cases where it does.

In some cases the examiner’s Office action does not determine the beginning of a statutory reply period. In all cases where the statutory reply period runs from the date of a previous action, a statement to that effect should be included.

Jump to MPEP SourceResponse to Office Action Requirements (37 CFR 1.111)Office Actions and ResponsesStatutory Period Computation (37 CFR 1.134)
Topic

Automatic Extension (1.136(a))

1 rules
StatutoryInformativeAlways
[mpep-710-01-a-cc940a6ce6b035e9a6003671]
Applicants Must Recognize Reply Dates for Extensions
Note:
Applicants are required to recognize the date for reply so that the proper fee for any extension can be submitted, especially when provisions of 37 CFR 1.136(a) do not apply.

Since extensions of time are available pursuant to 37 CFR 1.136(a), it is incumbent upon applicants to recognize the date for reply so that the proper fee for any extension will be submitted. Thus, the date upon which any reply is due will normally be indicated only in those instances where the provisions of 37 CFR 1.136(a) are not available. See MPEP Chapter 2200 for reexamination proceedings.

Jump to MPEP Source · 37 CFR 1.136(a)Automatic Extension (1.136(a))Maintenance Fee AmountsExtension of Time (37 CFR 1.136)

Citations

Primary topicCitation
Automatic Extension (1.136(a))37 CFR § 1.136(a)
Period for Reply (37 CFR 1.134)
Weekend and Holiday Rules
MPEP § 711.04(a)

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31