Granted Patent
Utility
US 4,254,637 · App. 06/086,587
Refrigeration system with refrigerant cooling of compressor and its oil
Inventors:
Paul J. Brauch, Paul G. Szymaszek
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Oct 19, 1979
Inventors
Paul J. Brauch
Paul G. Szymaszek
Assignee (at issue)
Vilter Manufacturing LLC
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.