Granted Patent
Utility
US 5,285,647 · App. 08/027,425
Refrigerant handling system with air purge and multiple refrigerant capabilities
Inventors:
Kenneth W. Manz, Sandra Snyder, Christopher M. Powers
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Mar 8, 1993
Inventors
Kenneth W. Manz
Sandra Snyder
Christopher M. Powers
Assignee (at issue)
SPX Corporation
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.