Patent bar Fees, entity status, papers and deadlines question: nonprovisional application by first-class mail with a certificate of mailing

Patent barFees, entity status, papers and deadlines

On the last day of the 12-month priority year, an applicant mails a new nonprovisional application by first-class mail with a certificate of mailing, intending to claim foreign priority. The USPTO receives it four days later. What filing date does it receive?

A The date the applicant signed the declaration
B The date on the certificate of mailing
C The date of receipt at the USPTO, so the twelve-month priority year was missed
D The postmark date, because first-class mail is always dated by postmark
E The date on the certificate, if a petition is filed

Show the answer and explanation

Answer: C. The date of receipt at the USPTO, so the twelve-month priority year was missed

Answer: The date of receipt at the USPTO, so the twelve-month priority year was missed. 37 CFR 1.8(a)(2)(i)(A) excludes the filing of a national application specification and drawings to obtain a filing date from the certificate of mailing procedure. The application gets the date it is received. Using Priority Mail Express under 1.10, or Patent Center, would have secured the date (MPEP 512, 513). Why not the others: - The certificate date: certificates do not apply to new applications. - A petition: the rule excludes this paper; a petition cannot change that. - The declaration date: signing date is irrelevant. - Postmark date: first-class mail is dated by receipt unless the 1.8 procedure applies; for new applications it does not. Rule: New applications cannot be filed with a 1.8 certificate; use Priority Mail Express or electronic filing. Source: MPEP § 512, § 513 (9th ed., Rev. 01.2024); 37 CFR 1.8(a)(2), 1.10; as at Oct 2026

Common mistake

Relying on a certificate of mailing to save a priority deadline.

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Original study material written from the MPEP; not a question from the current exam.Independent. Not affiliated with or endorsed by the USPTO. Verify figures and rules against current guidance before relying on them.