Granted Patent
Utility
US 4,396,722 · App. 06/365,705
Wool glass composition
Inventor:
Charles F. Rapp
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Apr 5, 1982
Inventor
Charles F. Rapp
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.