Granted Patent
Utility
US 4,308,702 · App. 06/174,044
Plastic building panel and method for making same
Inventor:
Joseph Rajewski
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Jul 31, 1980
Inventor
Joseph Rajewski
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.