Wednesday, July 8, 2026

Patent intelligence · US

US 6656917

Compositions and methods for targeted enzymatic release of cell regulatory compounds

expired A61KA61K47/54A61K47/549A61K48/00
Status expired
Linked drugs 1
Pipeline programs 6
Years to expiry 0
Applicant portfolio 27
Patent details — US 6656917
Jurisdiction
US
Status
expired
Grant date
Dec 2, 2003
Expiration
Nov 27, 2023
Claims
5
CPC classes
A61K, A61K47/54, A61K47/549, A61K48/00
View on Google Patents ↗

Quick answer

US 6656917 (Compositions and methods for targeted enzymatic release of cell regulatory compounds) is held by Marker Gene Technologies, Inc. Status: expired. Granted Dec 2, 2003. Expires Nov 27, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
5
CPC classes
A61K, A61K47/54, A61K47/549, A61K48/00

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Frequently asked questions

What is US patent 6656917?

US 6656917 (Compositions and methods for targeted enzymatic release of cell regulatory compounds) is held by Marker Gene Technologies, Inc. Status: expired. Granted Dec 2, 2003. Expires Nov 27, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6656917?

Marker Gene Technologies, Inc is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 27 pharmaceutical patents for this assignee.

When does US 6656917 expire?

Our index shows an expiration date of Nov 27, 2023 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.