IP Library › Granted Patent US 4,409,003
Granted Patent Utility
US 4,409,003 · App. 06/380,381

Carbonitride coated silicon nitride cutting tools

Inventors: Vinod K. Sarin, Sergej-Tomislav Buljan
Patented Case View Patent ↗
Granted: Oct 11, 1983 Filed: May 20, 1982
Inventors
Vinod K. Sarin
Sergej-Tomislav Buljan
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,409,003
App. No.
06/380,381
Filed
1982-05-20
Granted
1983-10-11
Kind
A