Granted Patent
Utility
US 4,421,528 · App. 06/380,361
Process for making a modified silicon aluminum oxynitride based composite cutting tool
Inventors:
Sergej-Tomislav Buljan, Vinod K. Sarin
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: May 20, 1982
Inventors
Sergej-Tomislav Buljan
Vinod K. Sarin
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.