Granted Patent
Utility
US 6,602,952 · App. 09/590,622
Hydrogels derived from chitosan and poly(ethylene glycol) or related polymers
Inventors:
Michael D. Bentley, Xuan Zhao
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Jun 8, 2000
Inventors
Michael D. Bentley
Xuan Zhao
Assignee (at issue)
Shearwater Corporation
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.