Granted Patent
Utility
US 4,431,390 · App. 06/314,154
Condensation control apparatus for oil-flooded compressors
Inventor:
John E. Hart
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Oct 23, 1981
Inventor
John E. Hart
Assignee (at issue)
Dresser Industries, 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.