Granted Patent
Utility
US 4,249,945 · App. 05/944,514
Powder-metallurgy steel article with high vanadium-carbide content
Inventors:
Walter T. Haswell, Jr., August Kasak
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Sep 20, 1978
Inventors
Walter T. Haswell, Jr.
August Kasak
Assignee (at issue)
CRUCIBLE, LLC
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.