Wednesday, July 8, 2026

Patent intelligence · US

US 6166039

Peripherally active anti-hyperalgesic opiates

expired A61KA61K31/00A61K31/17A61K31/439
Status expired
Linked drugs 1
Pipeline programs 6
Years to expiry 0
Applicant portfolio 8,292
Patent details — US 6166039
Jurisdiction
US
Status
expired
Grant date
Dec 26, 2000
Expiration
Dec 21, 2020
Claims
22
CPC classes
A61K, A61K31/00, A61K31/17, A61K31/439
View on Google Patents ↗

Quick answer

US 6166039 (Peripherally active anti-hyperalgesic opiates) is held by THE REGENTS OF THE UNIV. OF CALIFORNIA. Status: expired. Granted Dec 26, 2000. Expires Dec 21, 2020 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
22
CPC classes
A61K, A61K31/00, A61K31/17, A61K31/439, A61K31/445, A61K31/451

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Frequently asked questions

What is US patent 6166039?

US 6166039 (Peripherally active anti-hyperalgesic opiates) is held by THE REGENTS OF THE UNIV. OF CALIFORNIA. Status: expired. Granted Dec 26, 2000. Expires Dec 21, 2020 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6166039?

THE REGENTS OF THE UNIV. 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 6166039 expire?

Our index shows an expiration date of Dec 21, 2020 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.