Granted Patent
Utility
US 4,801,644 · App. 06/915,098
Coating compositions
Inventor:
Richard George Coogan
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Oct 3, 1986
Inventor
Richard George Coogan
Assignee (at issue)
Polyvinyl Chemicals 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.