Wednesday, July 8, 2026

Patent intelligence · US

US 6291431

Methods and compositions for the treatment and prevention of Staphylococcal infections

expired A61KA61K38/164A61K39/00A61K39/085
Status expired
Linked drugs 1
Pipeline programs 6
Years to expiry 0
Applicant portfolio 8,292
Patent details — US 6291431
Jurisdiction
US
Status
expired
Grant date
Sep 18, 2001
Expiration
Sep 13, 2021
Claims
26
CPC classes
A61K, A61K38/164, A61K39/00, A61K39/085
View on Google Patents ↗

Quick answer

US 6291431 (Methods and compositions for the treatment and prevention of Staphylococcal infections) is held by The Regents of the University of California. Status: expired. Granted Sep 18, 2001. Expires Sep 13, 2021 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
26
CPC classes
A61K, A61K38/164, A61K39/00, A61K39/085, A61P, A61P31/00

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Frequently asked questions

What is US patent 6291431?

US 6291431 (Methods and compositions for the treatment and prevention of Staphylococcal infections) is held by The Regents of the University of California. Status: expired. Granted Sep 18, 2001. Expires Sep 13, 2021 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6291431?

The Regents of the University of California is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 8,292 pharmaceutical patents for this assignee.

When does US 6291431 expire?

Our index shows an expiration date of Sep 13, 2021 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.