Granted Patent
Utility
US 5,976,459 · App. 09/003,368
Method for compacting high alloy tool steel particles
Inventors:
William B. Eisen, Walter T. Haswell, Jr., Kenneth J. Wojslaw, Jeryl K. Wright
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Jan 6, 1998
Inventors
William B. Eisen
Walter T. Haswell, Jr.
Kenneth J. Wojslaw
Jeryl K. Wright
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.