Granted Patent
Utility
US 5,958,569 · App. 08/860,163
Anchored oxide coatings on hard metal cutting tools
Inventors:
Roy V. Leverenz, John Bost
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Jun 16, 1997
Inventors
Roy V. Leverenz
John Bost
Assignee (at issue)
Teledyne Industries, Inc.
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.