Granted Patent
Utility
US 4,348,574 · App. 06/159,035
Flux dam for submerged arc welding
Inventors:
John J. Barger, James R. Underwood
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Jun 13, 1980
Inventors
John J. Barger
James R. Underwood
Assignee (at issue)
Combustion Engineering, Inc.
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.