Wednesday, July 8, 2026

Patent intelligence · US

US 6537979

Water-insoluble derivatives of hyaluronic acid crosslinked with a biscarbodiimide

expired A61KA61K47/36A61K47/61A61K47/6903
Status expired
Linked drugs 1
Pipeline programs 3
Years to expiry 0
Applicant portfolio 69
Patent details — US 6537979
Jurisdiction
US
Status
expired
Grant date
Mar 25, 2003
Expiration
Mar 20, 2023
Claims
12
CPC classes
A61K, A61K47/36, A61K47/61, A61K47/6903
View on Google Patents ↗

Quick answer

US 6537979 (Water-insoluble derivatives of hyaluronic acid crosslinked with a biscarbodiimide) is held by ANIKA THERAPEUTICS, INC.. Status: expired. Granted Mar 25, 2003. Expires Mar 20, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
12
CPC classes
A61K, A61K47/36, A61K47/61, A61K47/6903, A61K9/0014, A61K9/0019

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Frequently asked questions

What is US patent 6537979?

US 6537979 (Water-insoluble derivatives of hyaluronic acid crosslinked with a biscarbodiimide) is held by ANIKA THERAPEUTICS, INC.. Status: expired. Granted Mar 25, 2003. Expires Mar 20, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6537979?

ANIKA THERAPEUTICS, INC. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 69 pharmaceutical patents for this assignee.

When does US 6537979 expire?

Our index shows an expiration date of Mar 20, 2023 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.