Granted Patent
Utility
US 5,238,482 · App. 07/704,082
Prealloyed high-vanadium, cold work tool steel particles and methods for producing the same
Inventors:
William Stasko, Kenneth E. Pinnow
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: May 22, 1991
Inventors
William Stasko
Kenneth E. Pinnow
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.