Granted Patent
Utility
US 5,186,017 · App. 07/901,800
Refrigerant recovery device
Inventors:
John P. Hancock, Ralph A. McClelland
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Jun 22, 1992
Inventors
John P. Hancock
Ralph A. McClelland
Assignee (at issue)
K-Whit Tools, 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.