Wednesday, July 8, 2026

Patent intelligence · US

US 6696500

Sustained-release preparation

expired A61KA61K47/593A61K9/1647
Status expired
Linked drugs 3
Pipeline programs 6
Years to expiry 0
Applicant portfolio 1,436
Patent details — US 6696500

Quick answer

US 6696500 (Sustained-release preparation) is held by Takeda Chemical Industries Ltd.. Status: expired. Granted Feb 24, 2004. Expires Feb 19, 2024 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
1
CPC classes
A61K, A61K47/593, A61K9/1647

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Frequently asked questions

What is US patent 6696500?

US 6696500 (Sustained-release preparation) is held by Takeda Chemical Industries Ltd.. Status: expired. Granted Feb 24, 2004. Expires Feb 19, 2024 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6696500?

Takeda Chemical Industries Ltd. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 1,436 pharmaceutical patents for this assignee.

When does US 6696500 expire?

Our index shows an expiration date of Feb 19, 2024 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.