Granted Patent
Utility
US 5,043,381 · App. 07/406,878
Aqueous dispersions of a nonionic, water dispersible polyurethane having pendent polyoxyethylene chains
Inventors:
Richard George Coogan, Razmik Vartan-Boghossian
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Sep 13, 1989
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.