Granted Patent
Utility
US 5,002,731 · App. 07/340,814
Corrosion-and-wear-resistant cobalt-base alloy
Inventors:
Paul Anthony Crook, Aziz I. Asphahani, Steven J. Matthews
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Apr 17, 1989
Inventors
Paul Anthony Crook
Aziz I. Asphahani
Steven J. Matthews
Assignee (at issue)
Haynes 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.