Wednesday, June 10, 2026

Patent intelligence · RU

RU 2203884

RETINOID COMPOUNDS (VARIANTS), COMPOSITION, METHOD FOR ASSAY OF RETINOID HORMONE ANTAGONISTS, METHOD OF TREATMENT AND INTERMEDIATE SUBSTANCE…

expired A61K 31/ 15 A IA61K 31/ 37 A IA61K 31/ 44 A IA61K 31/ 47 A I
Status expired
Linked drugs 2
Pipeline programs 6
Years to expiry 0
Applicant portfolio 24
Patent details — RU 2203884
Jurisdiction
RU
Status
expired
Grant date
May 10, 2003
Expiration
May 5, 2023
CPC classes
A61K 31/ 15 A I, A61K 31/ 37 A I, A61K 31/ 44 A I, A61K 31/ 47 A I
View on Google Patents ↗

Quick answer

RU 2203884 (RETINOID COMPOUNDS (VARIANTS), COMPOSITION, METHOD FOR ASSAY OF RETINOID HORMONE ANTAGONISTS, METHOD OF TREATMENT AND INTERMEDIATE SUBSTANCES) is held by ALLERGEN SEJLZ INK [US]. Status: expired. Granted May 10, 2003. Expires May 5, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
CPC classes
A61K 31/ 15 A I, A61K 31/ 37 A I, A61K 31/ 44 A I, A61K 31/ 47 A I, A61K 31/ 192 A I, A61K 31/ 215 A I

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Frequently asked questions

What is US patent 2203884?

RU 2203884 (RETINOID COMPOUNDS (VARIANTS), COMPOSITION, METHOD FOR ASSAY OF RETINOID HORMONE ANTAGONISTS, METHOD OF TREATMENT AND INTERMEDIATE SUBSTANCES) is held by ALLERGEN SEJLZ INK [US]. Status: expired. Granted May 10, 2003. Expires May 5, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns RU 2203884?

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

When does RU 2203884 expire?

Our index shows an expiration date of May 5, 2023 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.