Granted Patent
Utility
US 5,158,750 · App. 07/750,296
Boron nitride crucible
Inventor:
Robert L. Finicle
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Aug 27, 1991
Inventor
Robert L. Finicle
Assignee (at issue)
Praxair S.T. Technology, Inc.
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.