Granted Patent
Utility
US 6,090,928 · App. 08/217,189
Process for the preparation and work-up of N-hydroxyalkylchitosans soluble in aqueous medium
Inventors:
Reinhard Donges, Diethart Reichel, Birgit Kessler
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Mar 24, 1994
Inventors
Reinhard Donges
Diethart Reichel
Birgit Kessler
Assignee (at issue)
Clariant 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.