Wednesday, June 10, 2026

Patent intelligence · US

US 6313163

2,4-pentadienoic acid derivatives having retinoid-like biological activity

expired A61K 31/ 20 A IA61K 31/ 23 A IA61K 31/ 35 A IA61K 31/ 38 A I
Status expired
Linked drugs 2
Pipeline programs 6
Years to expiry 0
Applicant portfolio 24
Patent details — US 6313163
Jurisdiction
US
Status
expired
Grant date
Nov 6, 2001
Expiration
Nov 1, 2021
CPC classes
A61K 31/ 20 A I, A61K 31/ 23 A I, A61K 31/ 35 A I, A61K 31/ 38 A I
View on Google Patents ↗

Quick answer

US 6313163 (2,4-pentadienoic acid derivatives having retinoid-like biological activity) is held by ALLERGEN SALES INC [US]. Status: expired. Granted Nov 6, 2001. Expires Nov 1, 2021 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
CPC classes
A61K 31/ 20 A I, A61K 31/ 23 A I, A61K 31/ 35 A I, A61K 31/ 38 A I, A61K 31/ 47 A I, A61K/3120

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Frequently asked questions

What is US patent 6313163?

US 6313163 (2,4-pentadienoic acid derivatives having retinoid-like biological activity) is held by ALLERGEN SALES INC [US]. Status: expired. Granted Nov 6, 2001. Expires Nov 1, 2021 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6313163?

ALLERGEN SALES INC [US] is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 24 pharmaceutical patents for this assignee.

When does US 6313163 expire?

Our index shows an expiration date of Nov 1, 2021 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.