Granted Patent
Utility
US 4,755,657 · App. 06/942,113
Method of heating an oil reservoir of a refrigeration compressor
Inventors:
James B. Crim, Richard B. Stallcup
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Dec 16, 1986
Inventors
James B. Crim
Richard B. Stallcup
Assignee (at issue)
American Standard 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.