Granted Patent
Utility
US 6,146,472 · App. 09/172,390
Method of making case-carburized steel components with improved core toughness
Inventor:
Michael J. Leap
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Oct 14, 1998
Inventor
Michael J. Leap
Assignee (at issue)
THE TIMKEN COMPANY
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.