Granted Patent
Utility
US 4,880,449 · App. 07/269,012
Compressor seal oil degassing tank vent gas recovery by method of level control
Inventor:
Mark R. Babyak
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Nov 9, 1988
Inventor
Mark R. Babyak
Assignee (at issue)
Elliott Turbomachinery Co., 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.