Granted Patent
Utility
US 6,447,890 · App. 09/467,936
Coatings for cutting tools
Inventors:
Roy V. Leverenz, John Bost, James J. Oakes
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Dec 21, 1999
Inventors
Roy V. Leverenz
John Bost
James J. Oakes
Assignee (at issue)
ATI PROPERTIES 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.