Granted Patent
Utility
US 4,477,397 · App. 06/944,540
Method for recycling greenware in the manufacture of hydrous calcium silicate insulation products
Inventor:
Jerry L. Helser
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Sep 21, 1978
Inventor
Jerry L. Helser
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.