Granted Patent
Utility
US 4,332,604 · App. 06/219,411
Strength improvement of glass batch pellets
Inventor:
Mark A. Propster
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Dec 22, 1980
Inventor
Mark A. Propster
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.