Granted Patent
Utility
US 4,643,767 · App. 06/672,963
Nuclear grade steels
Inventors:
Paul Anthony Crook, Richard D. Zordan
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Nov 19, 1984
Inventors
Paul Anthony Crook
Richard D. Zordan
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.