Granted Patent
Utility
US 5,347,821 · App. 08/096,801
Apparatus and method of oil charge loss protection for compressors
Inventors:
Robert L. Oltman, Michael D. Carey
Patented Case
View Patent ↗
Granted: Sep 20, 1994
Filed: Jul 23, 1993
Inventors
Robert L. Oltman
Michael D. Carey
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.