US 6407116
Nitrogenous fused-ring compounds, process for the preparation of the same, and drugs
expired A61PA61P37/08
Quick answer
US patent 6407116 (Nitrogenous fused-ring compounds, process for the preparation of the same, and drugs) held by Takeda Chemical Industries Ltd. expires Mon Jun 13 2022 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Jun 18 2002 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Jun 13 2022 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 10
- CPC classes
- A61P, A61P37/08