Granted Patent
Utility
US 4,882,138 · App. 07/204,058
Method for preparation of diamond ceramics
Inventor:
John M. Pinneo
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Jun 7, 1988
Inventor
John M. Pinneo
Assignee (at issue)
Crystallume Corporation
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.