Granted Patent
Utility
US 4,497,228 · App. 06/506,481
Method of machining cast iron
Inventors:
Vinod K. Sarin, Robert A. Penty, Sergej-Tomislav Buljan
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Jun 21, 1983
Inventors
Vinod K. Sarin
Robert A. Penty
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.