Wednesday, July 8, 2026

Patent intelligence · US

US 11931328

Stabilized formulations of 4-amino-3-substituted butanoic acid derivatives

granted A61KA61K31/197A61K9/0095A61K9/1611
Status granted
Linked drugs 3
Pipeline programs 6
Years to expiry 18
Applicant portfolio 32
Patent details — US 11931328
Jurisdiction
US
Status
granted
Grant date
Mar 19, 2024
Expiration
Mar 14, 2044
Claims
18
CPC classes
A61K, A61K31/197, A61K9/0095, A61K9/1611
View on Google Patents ↗

Quick answer

US 11931328 (Stabilized formulations of 4-amino-3-substituted butanoic acid derivatives) is held by AMNEAL PHARMACEUTICALS LLC. Status: granted. Granted Mar 19, 2024. Expires Mar 14, 2044 (18 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
18
CPC classes
A61K, A61K31/197, A61K9/0095, A61K9/1611, A61K9/1617, A61K9/1623

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Frequently asked questions

What is US patent 11931328?

US 11931328 (Stabilized formulations of 4-amino-3-substituted butanoic acid derivatives) is held by AMNEAL PHARMACEUTICALS LLC. Status: granted. Granted Mar 19, 2024. Expires Mar 14, 2044 (18 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 11931328?

AMNEAL PHARMACEUTICALS LLC is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 32 pharmaceutical patents for this assignee.

When does US 11931328 expire?

Our index shows an expiration date of Mar 14, 2044 (18 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.