Wednesday, July 8, 2026

Patent intelligence · US

US 8987227

Hepatitis C dsRNA effector molecules, expression constructs, compositions, and methods of use

granted A61PA61P31/14
Status granted
Linked drugs 3
Pipeline programs 6
Years to expiry 9
Applicant portfolio 379
Patent details — US 8987227

Quick answer

US 8987227 (Hepatitis C dsRNA effector molecules, expression constructs, compositions, and methods of use) is held by Alnylam Pharmaceuticals, Inc.. Status: granted. Granted Mar 24, 2015. Expires Mar 19, 2035 (9 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
7
CPC classes
A61P, A61P31/14

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Frequently asked questions

What is US patent 8987227?

US 8987227 (Hepatitis C dsRNA effector molecules, expression constructs, compositions, and methods of use) is held by Alnylam Pharmaceuticals, Inc.. Status: granted. Granted Mar 24, 2015. Expires Mar 19, 2035 (9 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 8987227?

Alnylam Pharmaceuticals, Inc. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 379 pharmaceutical patents for this assignee.

When does US 8987227 expire?

Our index shows an expiration date of Mar 19, 2035 (9 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.