Granted Patent
Utility
US 4,319,921 · App. 06/198,339
Heat recovery and melting system for scrap metals
Inventors:
Jerry C. Pryor, Roger E. Jenson
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Oct 20, 1980
Inventors
Jerry C. Pryor
Roger E. Jenson
Assignee (at issue)
Celotex Corporation
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.