Granted Patent
Utility
US 4,826,544 · App. 07/136,796
Hydrogen cleaning of hot copper rod
Inventor:
Horace Pops
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Dec 22, 1987
Inventor
Horace Pops
Assignee (at issue)
Essex Group LLC
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.