Granted Patent
Utility
US 5,700,917 · App. 08/628,421
Aldehyde cationic derivatives of galactose containing polysaccharides used as paper strength additives
Inventors:
Chung-Wai Chiu, Roger Jeffcoat, Matthew Henley, Leroy Peek
Patented Case
View Patent ↗
Granted: Dec 23, 1997
Filed: Apr 5, 1996
Inventors
Chung-Wai Chiu
Roger Jeffcoat
Matthew Henley
Leroy Peek
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.