Granted Patent
Utility
US 4,909,860 · App. 07/313,023
Method for strengthening cold worked nickel-base alloys
Inventors:
Jimmy C. England, Hugh-Hiram Ruble, Jr., Jon M. Poole
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Feb 21, 1989
Inventors
Jimmy C. England
Hugh-Hiram Ruble, Jr.
Jon M. Poole
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.