Granted Patent
Utility
US 6,497,903 · App. 09/214,306
Hydrolysable hydrogels for controlled release
Inventors:
Wilhelmus Everhardus Hennink, Wendelmoed Nelletha Eleonora van Dijk-Wolthuis
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Jul 20, 1999
Inventors
Wilhelmus Everhardus Hennink
Wendelmoed Nelletha Eleonora van Dijk-Wolthuis
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.