Granted Patent
Utility
US 4,887,514 · App. 07/273,242
Oil separation and gas pressure equalizer means for reciprocating gas compressor
Inventor:
Robert J. Schintgen
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Nov 18, 1988
Inventor
Robert J. Schintgen
Assignee (at issue)
Vilter Manufacturing LLC
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.