Granted Patent
Utility
US 5,190,734 · App. 07/660,332
Modified end assembly for high pressure, high temperature reaction vessels
Inventor:
Robert H. Frushour
Patented Case
View Patent ↗
Granted: Mar 2, 1993
Filed: Feb 22, 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.