Wednesday, July 8, 2026

Patent intelligence · US

US 8252275

Conjugates having a degradable linkage and polymeric reagents useful in preparing such conjugates

granted A61KA61K31/765A61K38/26A61K38/28
Status granted
Linked drugs 1
Pipeline programs 6
Years to expiry 6
Applicant portfolio 423
Patent details — US 8252275
Jurisdiction
US
Status
granted
Grant date
Aug 28, 2012
Expiration
Aug 23, 2032
Claims
30
CPC classes
A61K, A61K31/765, A61K38/26, A61K38/28
View on Google Patents ↗

Quick answer

US 8252275 (Conjugates having a degradable linkage and polymeric reagents useful in preparing such conjugates) is held by Nektar Therapeutics. Status: granted. Granted Aug 28, 2012. Expires Aug 23, 2032 (6 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
30
CPC classes
A61K, A61K31/765, A61K38/26, A61K38/28, A61K47/60, A61P

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Frequently asked questions

What is US patent 8252275?

US 8252275 (Conjugates having a degradable linkage and polymeric reagents useful in preparing such conjugates) is held by Nektar Therapeutics. Status: granted. Granted Aug 28, 2012. Expires Aug 23, 2032 (6 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 8252275?

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 8252275 expire?

Our index shows an expiration date of Aug 23, 2032 (6 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.