Granted Patent
Utility
US 5,675,978 · App. 08/756,629
Oil management apparatus for a refrigeration chiller
Inventors:
Frederic Byron Hamm, Jr., David H. Eber
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Nov 26, 1996
Inventors
Frederic Byron Hamm, Jr.
David H. Eber
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.