Granted Patent
Utility
US 4,462,815 · App. 06/451,115
Scrap glass recovery
Inventors:
Mark A. Propster, William L. Streicher
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Dec 20, 1982
Inventors
Mark A. Propster
William L. Streicher
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.