Granted Patent
Utility
US 5,244,368 · App. 07/792,716
High pressure/high temperature piston-cylinder apparatus
Inventor:
Robert H. Frushour
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Nov 15, 1991
Inventor
Robert H. Frushour
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.