Granted Patent
Utility
US 4,703,885 · App. 06/862,012
Method of welding austenitic steel to ferritic steel with filler alloys
Inventors:
James R. Lindgren, Brian E. Thurgood, James B. Wattier
Patented Case
View Patent ↗
Granted: Nov 3, 1987
Filed: May 12, 1986
Inventors
James R. Lindgren
Brian E. Thurgood
James B. Wattier
Assignee (at issue)
GA Technologies, 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.