Wednesday, July 8, 2026

Patent intelligence · US

US 6887920

Fillings and composite dental materials containing the fillings

expired A61KA61K6/20A61K6/30A61K6/54
Status expired
Linked drugs 1
Pipeline programs 6
Years to expiry 0
Applicant portfolio 132
Patent details — US 6887920
Jurisdiction
US
Status
expired
Grant date
May 3, 2005
Expiration
Apr 28, 2025
Applicant
KURARAY CO., LTD.
Claims
13
CPC classes
A61K, A61K6/20, A61K6/30, A61K6/54
View on Google Patents ↗

Quick answer

US 6887920 (Fillings and composite dental materials containing the fillings) is held by KURARAY CO., LTD.. Status: expired. Granted May 3, 2005. Expires Apr 28, 2025 (0 years remaining) — relevant for patent-cliff and LOE planning.

Key facts

Applicant
KURARAY CO., LTD.
Grant date
Expiration
Claims
13
CPC classes
A61K, A61K6/20, A61K6/30, A61K6/54, A61K6/71, A61K6/887

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Frequently asked questions

What is US patent 6887920?

US 6887920 (Fillings and composite dental materials containing the fillings) is held by KURARAY CO., LTD.. Status: expired. Granted May 3, 2005. Expires Apr 28, 2025 (0 years remaining) — relevant for patent-cliff and LOE planning.

Who owns US 6887920?

KURARAY CO., LTD. is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 132 pharmaceutical patents for this assignee.

When does US 6887920 expire?

Our index shows an expiration date of Apr 28, 2025 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.