Granted Patent
Utility
US 4,264,643 · App. 06/082,244
Method of improving the adhesion of polyurethane to vinyl resins
Inventors:
Guido J. Granata, Robert P. Conger, Peter J. Rohrbacher
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Oct 5, 1979
Inventors
Guido J. Granata
Robert P. Conger
Peter J. Rohrbacher
Assignee (at issue)
CONGOLEUM CORPORATION
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.