214.01 Time for Filing Priority Claim [R-07.2015]

37 CFR 1.55(d)(1) sets forth the time periods for filing a priority claim in an application filed under 35 U.S.C. 111(a). See 37 CFR 1.55(d)(2) and MPEP § 213.06 for the time period for claiming priority in an application entering the national stage. The time periods set forth in 37 CFR 1.55(d) do not apply to design applications.

For original applications filed under 35 U.S.C. 111(a), the requirements of the statute are that the applicant must (a) file a claim for the right of priority and (b) identify the original foreign application by specifying the application number of the foreign application, the intellectual property authority or country in which the application was filed and the date of filing of the application. 35 U.S.C. 119(b)(1) specifies that the claim for priority and the required identification information must be filed at such time during the pendency of the application as set by the Director. For applications other than design applications, the Director has by rule set this time period as the later of four months from the actual filing date of the application or sixteen months from the filing date of the prior foreign application. See 37 CFR 1.55(d)(1). This time period is not extendable. In an application that entered the national stage from an international application after compliance with 35 U.S.C. 371, the claim for priority must be made during the pendency of the application and within the time limit set forth in the PCT and the Regulations under the PCT. See 37 CFR 1.55(d)(2) and MPEP § 213.06. In a design application, a claim for priority may be made at any time during the pendency of the application. See 37 CFR 1.55(g). See also MPEP §§ 1504.10 and 2920.05(d) for additional information pertaining to priority claims in design applications.

Claims for foreign priority not presented within the time period specified in 37 CFR 1.55 are considered to have been waived. If a claim for priority under 35 U.S.C. 119(a) - (d) or (f), 365(a) or (b), or 386(a) or (b) is presented after the time period set in 37 CFR 1.55, the claim may be accepted if it includes the required identification information and is accompanied by a grantable petition to accept the unintentionally delayed claim for priority. See MPEP § 214.02 for the treatment of unintentionally delayed priority claims.

For applications filed under 35 U.S.C. 111(a) on or after September 16, 2012, 37 CFR 1.55(d)(1) requires the claim for priority to be presented in an application data sheet. For applications filed under 35 U.S.C. 111(a) prior to September 16, 2012, unless provided in an application data sheet, the oath or declaration under 37 CFR 1.63 must identify the foreign application for patent or inventor’s certificate for which priority is claimed under 37 CFR 1.55, and any foreign applications having a filing date before that of the application on which priority is claimed, by specifying the application number, country, day, month, and year of its filing. See 37 CFR 1.55(n).

214.02 Unintentionally Delayed Priority Claims [R-07.2022]

Where a priority claim under 37 CFR 1.55(g) was not timely made, 37 CFR 1.55(g) allows the priority claim and the certified copy required under 37 CFR 1.55 to be filed pursuant to a petition under 37 CFR 1.55(e) even if the application is not pending (e.g., a patented application). Thus, a petition under 37 CFR 1.55(e) may be filed along with request for a certificate of correction after patent grant. See MPEP § 216.01.

If a claim for foreign priority is presented after the time period set in 37 CFR 1.55, the claim may be accepted if it is accompanied by a grantable petition to accept the unintentionally delayed claim for priority. In addition, a petition to accept an unintentionally delayed claim for foreign priority is necessary to correct any error in a foreign priority claim if the correction is sought after expiration of the time period set forth in 37 CFR 1.55.

In all applications, a grantable petition to accept an unintentionally delayed claim for priority must include: (1) the claim (i.e., the claim required by 35 U.S.C. 119(a)-(d) or (f), 365(a) or (b), or 386(a) or (b) and 37 CFR 1.55) for priority to the prior foreign application, unless previously submitted; (2) a certified copy of the foreign application, unless previously submitted or an exception in 37 CFR 1.55(h), (i), or (j) applies; (3) the petition fee set forth in 37 CFR 1.17(m); and (4) a statement that the entire delay between the date the claim was due and the date the claim was filed was unintentional. While the Director may require additional information whenever there is a question of whether the delay was unintentional, a person filing a petition to accept a delayed priority claim more than two years after the date the foreign priority claim was due is required to provide additional explanation of the circumstances surrounding the delay that establishes that the entire delay was unintentional. This requirement is in addition to the requirement to provide a statement that the entire delay was unintentional in 37 CFR 1.55(e). See Clarification of the Practice for Requiring Additional Information in Petitions Filed in Patent Applications and Patents Based on Unintentional Delay, 85 FR 12222-24 (March 2, 2020). See also MPEP § 711.03(c) for further discussion of the “unintentional” delay standard.

37 CFR 1.55(e)(2) requires that a petition to accept a delayed claim for priority be accompanied by a certified copy of the foreign application, unless previously submitted or an exception in 37 CFR 1.55(h), (i), or (j) applies. 37 CFR 1.55(h) contains provisions relating to when the requirement for a certified copy will be considered satisfied based on a certified copy filed in another U.S. patent or application (see also MPEP § 215, subsection III); 37 CFR 1.55(i) contains provisions relating to the priority document exchange agreement (see also MPEP §§ 215.01 and 215.02(a)); and 37 CFR 1.55(j) contains provisions relating to the filing of an interim copy of a foreign application (see also MPEP § 215.02(b)). If a grantable petition under 37 CFR 1.55(e) is filed, a further petition to accept the delayed filing of the certified copy is not required.

Priority claims and certified copies of foreign applications filed after payment of the issue fee and before the patent grant will be placed in the application file but will not be reviewed.

Before May 13, 2015, no procedures were established for accepting an unintentionally delayed priority claim in a design application. Effective May 13, 2015, 37 CFR 1.55(e) provides for the filing of a petition for acceptance of an unintentionally delayed priority claim in a design application where the foreign priority claim was not submitted during the pendency of the design application. Thus, a petition under 37 CFR 1.55(e) may be filed along with request for a certificate of correction after patent grant in utility, plant, and design applications. See MPEP § 216.01.

214.03 Office Acknowledgement of Priority Claims [R-07.2022]

If the foreign priority claim in an original application filed under 35 U.S.C. 111(a) (other than a design application) is submitted after the time period set in 37 CFR 1.55 and without a petition under 37 CFR 1.55, the examiner may use form paragraph 2.21.01 to notify applicant that the foreign priority claim will not be entered.

When the claim for foreign priority and the certified copy of the foreign application are received within the time period set forth in 37 CFR 1.55, if applicable, they are entered into the application file history. Assuming that the papers are timely and regular in form and that there are no irregularities in dates, the examiner in the next Office action will advise the applicant that the papers have been received on form PTOL-326 or by use of form paragraph 2.26.

Where the foreign priority papers have been filed in a parent application, use form paragraph 2.27.

Where the earlier foreign application was filed more than 12 months prior to the U.S. application and priority has not been restored under PCT Rule 26bis.3 for an international application or upon a granted petition under 37 CFR 1.55(c), use form paragraph 2.23.

For example, where a British provisional specification was filed more than a year before a U.S. application, but the British complete application was filed within the year, and certified copies of both were submitted, language similar to the following should be used: “Receipt is acknowledged of papers filed on September 18, 1979, purporting to comply with the requirements of 35 U.S.C. 119(a)-(d). It is not seen how the claim for priority can be based on the British specification filed January 23, 1978, because the instant application was filed more than one year thereafter. However, the printed heading of the patent will note the claimed priority date based on the complete specification; i.e., November 1, 1978, for such subject matter as was not disclosed in the provisional specification.”

When the claim for foreign priority or the certified copy of the foreign application is filed after the date of payment of the issue fee but prior to the date of grant of the patent, the foreign priority claim or certified copy will be placed in the file record but there may be no review of the papers and the patent when published will not include the priority claim. A certificate of correction under 35 U.S.C. 255 and 37 CFR 1.323 can be filed to have the foreign priority claim or certified copy considered after publication of the patent. In addition, for original applications filed under 35 U.S.C. 111(a) or international applications entering the national stage under 35 U.S.C. 371, a grantable petition to accept an unintentionally delayed claim for priority under 37 CFR 1.55and the petition fee must be filed with the certificate of correction. See MPEP § 216.01.

214.04 Proper Identification of Priority Application in Foreign Priority Claim [R-08.2017]

To ensure an accurate and complete citation of a foreign priority application, applicants should review the list of the various intellectual property offices and the recommended presentation of a foreign application number for each, which can be found in the tables of the online WIPO Handbook on Industrial Property Information and Documentation (www.wipo.int/standards/en/), Part 7: Examples and Industrial Property Offices Practices (www.wipo.int/standards/en/part_07.html), including Part 7.2.1: Presentation of Application Numbers (www.wipo.int/standards/en/pdf/_07-02- 01.pdf). The tables should enable applicants, examiners and others to extract from the various formats the minimum required data which comprises a proper citation. The “Minimum Significant Part of the Number” identified in the tables should be used in United States Patent and Trademark Office records. Proper identification of priority applications is essential to establishing accurate and complete relationships among various patent documents, especially in the context of electronic priority document exchange programs (see MPEP § 215.01).

The tables set forth below include only a partial list of recommended presentations of foreign application numbers. A complete updated list of the recommended presentation of a foreign application number based on the numbering system used by the foreign intellectual property office is maintained by the WIPO and can be found in the online WIPO Handbook on Industrial Property Information and Documentation as explained above. See also www.wipo.int/export/sites/www/standards/ en/pdf_/07-02-06.pdf for a survey of current practices regarding the numbering of applications and priority applications.