Granted Patent
Utility
US 5,502,974 · App. 08/299,523
Hydraulic system for recovering refrigerants
Inventor:
Kevin Zugibe
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Sep 1, 1994
Inventor
Kevin Zugibe
Assignee (at issue)
Hudson Technologies, 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.