US 6413972
Nitrogen-containing heterocyclic compounds, their production and use
expired A61KA61K31/506A61P
Quick answer
US patent 6413972 (Nitrogen-containing heterocyclic compounds, their production and use) held by Takeda Chemical Industries Ltd. expires Mon Jun 27 2022 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Jul 02 2002 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Jun 27 2022 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 31
- CPC classes
- A61K, A61K31/506, A61P, A61P15/18, A61P5/02