Granted Patent
Utility
US 5,169,895 · App. 07/538,335
Aqueous dispersions of polyurethane
Inventors:
Richard George Coogan, Razmik Vartan-Boghossian
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Jun 14, 1990
Inventors
Richard George Coogan
Razmik Vartan-Boghossian
Assignee (at issue)
ICI Americas, Inc.
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.