Granted Patent
Utility
US 6,140,262 · App. 09/361,846
Polycrystalline cubic boron nitride cutting tool
Inventors:
Matthew W. Collier, Xian Yao, Brian Bowers
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Jul 27, 1999
Inventors
Matthew W. Collier
Xian Yao
Brian Bowers
Assignee (at issue)
SMITH INTERNATIONAL, 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.