Wednesday, July 8, 2026

Patent intelligence · US

US 8653286

Intermediates useful in the preparation of maleimide functionalized polymers

granted A61KA61K47/60
Status granted
Linked drugs 1
Pipeline programs 6
Years to expiry 8
Applicant portfolio 423
Patent details — US 8653286

Quick answer

US 8653286 (Intermediates useful in the preparation of maleimide functionalized polymers) is held by Nektar Therapeutics. Status: granted. Granted Feb 18, 2014. Expires Feb 13, 2034 (8 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
1
CPC classes
A61K, A61K47/60

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Frequently asked questions

What is US patent 8653286?

US 8653286 (Intermediates useful in the preparation of maleimide functionalized polymers) is held by Nektar Therapeutics. Status: granted. Granted Feb 18, 2014. Expires Feb 13, 2034 (8 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 8653286?

Nektar Therapeutics is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 423 pharmaceutical patents for this assignee.

When does US 8653286 expire?

Our index shows an expiration date of Feb 13, 2034 (8 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.