Granted Patent
Utility
US 6,331,497 · App. 09/514,476
Polycrystalline cubic boron nitride cutting tool
Inventors:
Matthew W. Collier, Xian Yao, Brian Bowers
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: Feb 28, 2000
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.