Granted Patent
Utility
US 5,029,448 · App. 07/468,653
Oil separator for refrigeration systems
Inventor:
Michael D. Carey
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Jan 23, 1990
Inventor
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.