Granted Patent
Utility
US 4,367,248 · App. 06/293,025
Treatment of glass for high temperature resistance
Inventor:
George W. Ritter, II
Patented Case
View Patent ↗
Granted: Jan 4, 1983
Filed: Aug 14, 1981
Inventor
George W. Ritter, II
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.