US 6376536
Quaternary ammonium salts and their use
expired A61KA61K31/335A61K31/351
Quick answer
US patent 6376536 (Quaternary ammonium salts and their use) held by Takeda Chemical Industries Ltd. expires Mon Apr 18 2022 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Apr 23 2002 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Apr 18 2022 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 7
- CPC classes
- A61K, A61K31/335, A61K31/351, A61K31/452, A61K31/4523