Wednesday, July 8, 2026

Patent intelligence · US

US 9085659

Polymer derivatives comprising an imide branching point

granted A61KA61K47/60A61K47/6903
Status granted
Linked drugs 1
Pipeline programs 6
Years to expiry 9
Applicant portfolio 423
Patent details — US 9085659
Jurisdiction
US
Status
granted
Grant date
Jul 21, 2015
Expiration
Jul 16, 2035
Claims
22
CPC classes
A61K, A61K47/60, A61K47/6903
View on Google Patents ↗

Quick answer

US 9085659 (Polymer derivatives comprising an imide branching point) is held by Nektar Therapeutics. Status: granted. Granted Jul 21, 2015. Expires Jul 16, 2035 (9 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
22
CPC classes
A61K, A61K47/60, A61K47/6903

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Frequently asked questions

What is US patent 9085659?

US 9085659 (Polymer derivatives comprising an imide branching point) is held by Nektar Therapeutics. Status: granted. Granted Jul 21, 2015. Expires Jul 16, 2035 (9 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 9085659?

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 9085659 expire?

Our index shows an expiration date of Jul 16, 2035 (9 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.