US 6346521
Optically active 2R, 4S benzothiepin isomer
expired A61PA61P19/08
Quick answer
US patent 6346521 (Optically active 2R, 4S benzothiepin isomer) held by Takeda Chemical Industries Ltd. expires Mon Feb 07 2022 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Feb 12 2002 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Feb 07 2022 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 14
- CPC classes
- A61P, A61P19/08