Granted Patent
Utility
US 5,116,967 · App. 07/524,757
Method of manufacturing an adjustable-viscosity cationic starch
Inventors:
Wolfgang Fischer, Dietmar Bischoff, Michael Huss, Reinhard Stober, Gert Roessler
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: May 17, 1990
Inventors
Wolfgang Fischer
Dietmar Bischoff
Michael Huss
Reinhard Stober
Gert Roessler
Assignee (at issue)
Degussa AG
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.