Office Action checkout

Owner

MOMENTA

Status date

Jul 27, 2026

Deadline

27 Oct 2026

Status 641 means the USPTO mailed a non-final Office Action identifying issues with your application. You typically have three months to respond with arguments, amendments, or evidence. Missing the deadline can abandon the application.

The USPTO examiner issued a likelihood of confusion refusal based on an existing registration and requested a disclaimer for the descriptive word in your mark.