Wednesday, July 8, 2026

Patent intelligence · US

US 11668704

Degradation preventing means for immunoassay reagent containing insoluble carrier particles

granted A61KA61K8/44
Status granted
Linked drugs 1
Pipeline programs 6
Years to expiry 17
Applicant portfolio 132
Patent details — US 11668704

Quick answer

US 11668704 (Degradation preventing means for immunoassay reagent containing insoluble carrier particles) is held by Fujikura Kasei Co., Ltd.. Status: granted. Granted Jun 6, 2023. Expires Jun 1, 2043 (17 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
6
CPC classes
A61K, A61K8/44

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Frequently asked questions

What is US patent 11668704?

US 11668704 (Degradation preventing means for immunoassay reagent containing insoluble carrier particles) is held by Fujikura Kasei Co., Ltd.. Status: granted. Granted Jun 6, 2023. Expires Jun 1, 2043 (17 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 11668704?

Fujikura Kasei Co., Ltd. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 132 pharmaceutical patents for this assignee.

When does US 11668704 expire?

Our index shows an expiration date of Jun 1, 2043 (17 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.