Granted Patent
Utility
US 4,233,064 · App. 06/026,902
Method of scavenging steel
Inventor:
Edward J. Dunn, Jr.
Patented Case
View Patent ↗
Granted: Nov 11, 1980
Filed: Apr 4, 1979
Inventor
Edward J. Dunn, Jr.
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.