Wednesday, July 8, 2026

Patent intelligence · US

US 8067431

Chemically modified small molecules

granted A61KA61K31/167A61K31/485A61K47/60
Status granted
Linked drugs 1
Pipeline programs 6
Years to expiry 5
Applicant portfolio 423
Patent details — US 8067431
Jurisdiction
US
Status
granted
Grant date
Nov 29, 2011
Expiration
Nov 24, 2031
Claims
7
CPC classes
A61K, A61K31/167, A61K31/485, A61K47/60
View on Google Patents ↗

Quick answer

US 8067431 (Chemically modified small molecules) is held by Nektar Therapeutics. Status: granted. Granted Nov 29, 2011. Expires Nov 24, 2031 (5 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
7
CPC classes
A61K, A61K31/167, A61K31/485, A61K47/60, A61K9/007, A61P

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Frequently asked questions

What is US patent 8067431?

US 8067431 (Chemically modified small molecules) is held by Nektar Therapeutics. Status: granted. Granted Nov 29, 2011. Expires Nov 24, 2031 (5 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 8067431?

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 8067431 expire?

Our index shows an expiration date of Nov 24, 2031 (5 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.