Wednesday, July 8, 2026

Patent intelligence · US

US 9326991

Nucleotide prodrug compounds and use

granted A61KA61K31/7056A61K45/06A61P
Status granted
Linked drugs 3
Pipeline programs 6
Years to expiry 10
Applicant portfolio 133
Patent details — US 9326991
Jurisdiction
US
Status
granted
Grant date
May 3, 2016
Expiration
Apr 28, 2036
Claims
22
CPC classes
A61K, A61K31/7056, A61K45/06, A61P
View on Google Patents ↗

Quick answer

US 9326991 (Nucleotide prodrug compounds and use) is held by Ligand Pharmaceuticals Incorporated. Status: granted. Granted May 3, 2016. Expires Apr 28, 2036 (10 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
22
CPC classes
A61K, A61K31/7056, A61K45/06, A61P, A61P31/12

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Frequently asked questions

What is US patent 9326991?

US 9326991 (Nucleotide prodrug compounds and use) is held by Ligand Pharmaceuticals Incorporated. Status: granted. Granted May 3, 2016. Expires Apr 28, 2036 (10 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 9326991?

Ligand Pharmaceuticals Incorporated is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 133 pharmaceutical patents for this assignee.

When does US 9326991 expire?

Our index shows an expiration date of Apr 28, 2036 (10 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.