US 6248740
Condensed pyridazine derivatives, their production and use
expired A61PA61P11/06
Quick answer
US patent 6248740 (Condensed pyridazine derivatives, their production and use) held by Takeda Chemical Industries Ltd. expires Mon Jun 14 2021 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Jun 19 2001 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Jun 14 2021 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 33
- CPC classes
- A61P, A61P11/06