Granted Patent
Utility
US 5,016,447 · App. 07/517,777
Oil return for a two-stage compressor having interstage cooling
Inventors:
L. Thomas Lane, Bruce A. Fraser, Thomas Brendel
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: May 2, 1990
Inventors
L. Thomas Lane
Bruce A. Fraser
Thomas Brendel
Assignee (at issue)
CARRIER CORPORATION
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.