US 6419961
Sustained release microcapsules of a bioactive substance and a biodegradable polymer
expired A61KA61K9/1647
Quick answer
US patent 6419961 (Sustained release microcapsules of a bioactive substance and a biodegradable polymer) held by Takeda Chemical Industries Ltd. expires Mon Jul 11 2022 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Takeda Chemical Industries Ltd.
- Grant date
- Tue Jul 16 2002 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Jul 11 2022 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 9
- CPC classes
- A61K, A61K9/1647