Wednesday, July 8, 2026

Patent intelligence · US

US 8491880

Pharmaceutical formulations of biodegradable biocompatible camptothecin-polymer conjugates

granted A61KA61K31/44A61K47/59A61P
Status granted
Linked drugs 1
Pipeline programs 6
Years to expiry 7
Applicant portfolio 136
Patent details — US 8491880
Jurisdiction
US
Status
granted
Grant date
Jul 23, 2013
Expiration
Jul 18, 2033
Claims
93
CPC classes
A61K, A61K31/44, A61K47/59, A61P
View on Google Patents ↗

Quick answer

US 8491880 (Pharmaceutical formulations of biodegradable biocompatible camptothecin-polymer conjugates) is held by Mersana Therapeutics, Inc.. Status: granted. Granted Jul 23, 2013. Expires Jul 18, 2033 (7 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
93
CPC classes
A61K, A61K31/44, A61K47/59, A61P, A61P35/00

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Frequently asked questions

What is US patent 8491880?

US 8491880 (Pharmaceutical formulations of biodegradable biocompatible camptothecin-polymer conjugates) is held by Mersana Therapeutics, Inc.. Status: granted. Granted Jul 23, 2013. Expires Jul 18, 2033 (7 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 8491880?

Mersana Therapeutics, Inc. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 136 pharmaceutical patents for this assignee.

When does US 8491880 expire?

Our index shows an expiration date of Jul 18, 2033 (7 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.