US 6187788
Condensed-ring thiophene derivatives, their production and use
expired A61PA61P5/04A61P5/24
Quick answer
US patent 6187788 (Condensed-ring thiophene derivatives, their production and use) held by Takeda Chemical Industries Ltd. expires Mon Feb 08 2021 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Feb 13 2001 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Feb 08 2021 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 8
- CPC classes
- A61P, A61P5/04, A61P5/24