Patent intelligence · US
US 6638919
Antiviral purine derivatives
Antiviral purine derivatives
Patent details — US 6638919
- Jurisdiction
- US
- Status
- expired
- Grant date
- Oct 28, 2003
- Expiration
- Oct 23, 2023
- Claims
- 19
- CPC classes
- A61P, A61P31/00, A61P31/12, A61P31/14
Quick answer
US 6638919 (Antiviral purine derivatives) is held by University College Cardiff Consultants Limited. Status: expired. Granted Oct 28, 2003. Expires Oct 23, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.
Key facts
- Grant date
- Expiration
- Claims
- 19
- CPC classes
- A61P, A61P31/00, A61P31/12, A61P31/14, A61P31/16, A61P31/18
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Frequently asked questions
What is US patent 6638919?
US 6638919 (Antiviral purine derivatives) is held by University College Cardiff Consultants Limited. Status: expired. Granted Oct 28, 2003. Expires Oct 23, 2023 (0 years remaining) — relevant for patent-cliff and LOE planning.
Who owns US 6638919?
University College Cardiff Consultants Limited is listed as the applicant in USPTO PatentsView records indexed by NovaPharmaNews. We track 69 pharmaceutical patents for this assignee.
When does US 6638919 expire?
Our index shows an expiration date of Oct 23, 2023 (0 years from today). Confirm material dates against USPTO, FDA Orange Book, or qualified counsel before contractual decisions.