Granted Patent
Utility
US 4,325,724 · App. 05/841,860
Method for making glass
Inventor:
Magnus L. Froberg
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Oct 6, 1977
Inventor
Magnus L. Froberg
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.