Granted Patent
Utility
US 4,289,536 · App. 06/131,348
Glass fiber reinforced cements and process for manufacture of same
Inventor:
Ernst Dereser
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Mar 19, 1980
Inventor
Ernst Dereser
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.