Granted Patent
Utility
US 4,420,672 · App. 06/260,073
Method and apparatus to produce electroslag T-joints where fillets are required
Inventor:
James R. Nolt, Jr.
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: May 4, 1981
Inventor
James R. Nolt, Jr.
Assignee (at issue)
Allis-Chalmers 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.