Granted Patent
Utility
US 4,969,964 · App. 07/354,310
Heat treatment method for reducing polythionic acid stress corrosion cracking
Inventors:
James R. Crum, William G. Lipscomb, Pasupathy Ganesan
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: May 19, 1989
Inventors
James R. Crum
William G. Lipscomb
Pasupathy Ganesan
Assignee (at issue)
INCO Alloys International, 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.