Wednesday, July 8, 2026

Patent intelligence · US

US 6331564

Use of triaryl methane compounds for inhibiting unwanted cellular proliferation associated with inflammatory disease

expired A61KA61K31/03A61K31/05A61K31/075
Status expired
Linked drugs 2
Pipeline programs 6
Years to expiry 0
Applicant portfolio 4
Patent details — US 6331564
Jurisdiction
US
Status
expired
Grant date
Dec 18, 2001
Expiration
Dec 13, 2021
Claims
13
CPC classes
A61K, A61K31/03, A61K31/05, A61K31/075
View on Google Patents ↗

Quick answer

US 6331564 (Use of triaryl methane compounds for inhibiting unwanted cellular proliferation associated with inflammatory disease) is held by Ion Pharmaceuticals, Inc.. Status: expired. Granted Dec 18, 2001. Expires Dec 13, 2021 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Grant date
Expiration
Claims
13
CPC classes
A61K, A61K31/03, A61K31/05, A61K31/075, A61K31/085, A61K31/10

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Frequently asked questions

What is US patent 6331564?

US 6331564 (Use of triaryl methane compounds for inhibiting unwanted cellular proliferation associated with inflammatory disease) is held by Ion Pharmaceuticals, Inc.. Status: expired. Granted Dec 18, 2001. Expires Dec 13, 2021 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6331564?

Ion Pharmaceuticals, Inc. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 4 pharmaceutical patents for this assignee.

When does US 6331564 expire?

Our index shows an expiration date of Dec 13, 2021 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.