Granted Patent
Utility
US 5,955,561 · App. 08/994,615
Hydroxy esters and amides derived from active ester urethanes and their use in film-forming compositions
Inventor:
Padmanabhan Sundararaman
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Dec 19, 1997
Inventor
Padmanabhan Sundararaman
Assignee (at issue)
PPG Industries Ohio, 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.