Granted Patent
Utility
US 5,741,783 · App. 08/576,628
N-cyanomethylated chitosans and hydrolysates thereof
Inventors:
Jürg Haase, Martin Kuhn
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: Dec 21, 1995
Inventors
Jürg Haase
Martin Kuhn
Assignee (at issue)
Ciba Specialty Chemicals 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.