Granted Patent
Utility
US 4,244,192 · App. 05/968,325
Refrigeration system and reciprocating compressor therefor with pressure stabilizing seal
Inventor:
Fred F. Chellis
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Dec 11, 1978
Inventor
Fred F. Chellis
Assignee (at issue)
Helix 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.