Granted Patent
Utility
US 4,272,289 · App. 06/098,871
Oxidation resistant iron base alloy articles for welding
Inventors:
Robert B. Herchenroeder, H. Joseph Klein
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Nov 29, 1979
Inventors
Robert B. Herchenroeder
H. Joseph Klein
Assignee (at issue)
Cabot 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.