US 6627630
Condensed pyridazine derivatives, their production and use
expired A61PA61P11/06
Quick answer
US patent 6627630 (Condensed pyridazine derivatives, their production and use) held by Takeda Chemical Industries Ltd. expires Mon Sep 25 2023 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Sep 30 2003 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Sep 25 2023 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 20
- CPC classes
- A61P, A61P11/06