Granted Patent
Utility
US 4,867,657 · App. 07/212,766
Scroll compressor with axially balanced shaft
Inventors:
Peter A. Kotlarek, Delmar R. Riffe
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jun 29, 1988
Inventors
Peter A. Kotlarek
Delmar R. Riffe
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.