e-CFR Navigation Aids


Simple Search

Advanced Search

 — Boolean

 — Proximity


Search History

Search Tips


Latest Updates

User Info


Agency List

Incorporation By Reference

eCFR logo

Related Resources

Electronic Code of Federal Regulations

We invite you to try out our new beta eCFR site at https://ecfr.federalregister.gov. We have made big changes to make the eCFR easier to use. Be sure to leave feedback using the Feedback button on the bottom right of each page!

e-CFR data is current as of November 24, 2020

Title 37Chapter IPart 41Subpart C → §41.66

Title 37: Patents, Trademarks, and Copyrights
Subpart C—Inter Partes Appeals

§41.66   Time for filing briefs.

(a) An appellant's brief must be filed no later than two months from the latest filing date of the last-filed notice of appeal or cross appeal or, if any party to the proceeding is entitled to file an appeal or cross appeal but fails to timely do so, no later than two months from the expiration of the time for filing (by the last party entitled to do so) such notice of appeal or cross appeal. The time for filing an appellant's brief or an amended appellant's brief may not be extended.

(b) Once an appellant's brief has been properly filed, any brief must be filed by respondent within one month from the date of service of the appellant's brief. The time for filing a respondent's brief or an amended respondent's brief may not be extended.

(c) The examiner will consider both the appellant's and respondent's briefs and may prepare an examiner's answer under §41.69.

(d) Any appellant may file a rebuttal brief under §41.71 within one month of the date of the examiner's answer. The time for filing a rebuttal brief or an amended rebuttal brief may not be extended.

(e) No further submission will be considered and any such submission will be treated in accordance with §1.939 of this title.

Need assistance?