Granted Patent
Utility
US 4,154,887 · App. 05/892,145
Surface treatment of rigid polyvinyl chloride
Inventors:
Fred S. Morshauser, Luther L. Roberts
Patented Case
View Patent ↗
Granted: May 15, 1979
Filed: Mar 31, 1978
Inventors
Fred S. Morshauser
Luther L. Roberts
Assignee (at issue)
GAF 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.