Wednesday, July 8, 2026

Patent intelligence · US

US 11998639

Formulations of (R)-2-amino-3-phenylpropyl carbamate

granted A61KA61K31/165A61K31/27A61K9/2013
Status granted
Linked drugs 2
Pipeline programs 6
Years to expiry 18
Applicant portfolio 162
Patent details — US 11998639
Jurisdiction
US
Status
granted
Grant date
Jun 4, 2024
Expiration
May 30, 2044
Applicant
AXSOME MALTA LTD.
Claims
19
CPC classes
A61K, A61K31/165, A61K31/27, A61K9/2013
View on Google Patents ↗

Quick answer

US 11998639 (Formulations of (R)-2-amino-3-phenylpropyl carbamate) is held by AXSOME MALTA LTD.. Status: granted. Granted Jun 4, 2024. Expires May 30, 2044 (18 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Applicant
AXSOME MALTA LTD.
Grant date
Expiration
Claims
19
CPC classes
A61K, A61K31/165, A61K31/27, A61K9/2013, A61K9/2018, A61K9/2027

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Frequently asked questions

What is US patent 11998639?

US 11998639 (Formulations of (R)-2-amino-3-phenylpropyl carbamate) is held by AXSOME MALTA LTD.. Status: granted. Granted Jun 4, 2024. Expires May 30, 2044 (18 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 11998639?

AXSOME MALTA LTD. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 162 pharmaceutical patents for this assignee.

When does US 11998639 expire?

Our index shows an expiration date of May 30, 2044 (18 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.