Granted Patent
Utility
US 4,942,922 · App. 07/259,520
Welded corrosion-resistant ferritic stainless steel tubing having high resistance to hydrogen embrittlement and a cathodically protected heat exchanger containing the same
Inventors:
Lawrence S. Redmerski, Kenneth E. Pinnow, John J. Eckenrod
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Oct 18, 1988
Inventors
Lawrence S. Redmerski
Kenneth E. Pinnow
John J. Eckenrod
Assignee (at issue)
Crucible Materials 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.