Wednesday, July 8, 2026

Patent intelligence · US

US 6699994

Biaryl compounds as serine protease inhibitors

expired A61KA61K31/192A61K31/341A61K31/381
Status expired
Linked drugs 3
Pipeline programs 6
Years to expiry 0
Applicant portfolio 72
Patent details — US 6699994
Jurisdiction
US
Status
expired
Grant date
Mar 2, 2004
Expiration
Feb 26, 2024
Claims
21
CPC classes
A61K, A61K31/192, A61K31/341, A61K31/381
View on Google Patents ↗

Quick answer

US 6699994 (Biaryl compounds as serine protease inhibitors) is held by BioCryst Pharmaceuticals, Inc.. Status: expired. Granted Mar 2, 2004. Expires Feb 26, 2024 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
21
CPC classes
A61K, A61K31/192, A61K31/341, A61K31/381, A61K31/426, A61K31/4418

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Frequently asked questions

What is US patent 6699994?

US 6699994 (Biaryl compounds as serine protease inhibitors) is held by BioCryst Pharmaceuticals, Inc.. Status: expired. Granted Mar 2, 2004. Expires Feb 26, 2024 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6699994?

BioCryst Pharmaceuticals, Inc. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 72 pharmaceutical patents for this assignee.

When does US 6699994 expire?

Our index shows an expiration date of Feb 26, 2024 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.