US 6664331
Poly(ethylene glycol) derivatives with proximal reactive groups
expired A61KA61K47/60
Quick answer
US patent 6664331 (Poly(ethylene glycol) derivatives with proximal reactive groups) held by Nektar Therapeutics AL, Corporation expires Mon Dec 11 2023 00:00:00 GMT+0000 (Coordinated Universal Time). Status: expired.
Key facts
- Applicant
- Nektar Therapeutics AL, Corporation
- Grant date
- Tue Dec 16 2003 00:00:00 GMT+0000 (Coordinated Universal Time)
- Expiration
- Mon Dec 11 2023 00:00:00 GMT+0000 (Coordinated Universal Time)
- Claims
- 53
- CPC classes
- A61K, A61K47/60