Granted Patent
Utility
US 6,159,721 · App. 08/919,190
Amine modified polysaccharides
Inventors:
Huai N. Cheng, Qu-Ming Gu, Robert G. Nickol
Patented Case
View Patent ↗
Granted: Dec 12, 2000
Filed: Aug 20, 1997
Inventors
Huai N. Cheng
Qu-Ming Gu
Robert G. Nickol
Assignee (at issue)
HERCULES LLC
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.