Granted Patent
Utility
US 4,416,670 · App. 06/380,362
Carbide coated composite silicon nitride cutting tools
Inventors:
Vinod K. Sarin, Sergej-Tomislav Buljan, Charles D'Angelo, III
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: May 20, 1982
Inventors
Vinod K. Sarin
Sergej-Tomislav Buljan
Charles D'Angelo, III
Assignee (at issue)
GTE Laboratories Incorporated
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.