Granted Patent
Utility
US 5,498,873 · App. 08/340,266
Refrigerant impurity analyzer
Inventors:
Leonard N. Liebermann, Philip Salzmann
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Nov 15, 1994
Inventors
Leonard N. Liebermann
Philip Salzmann
Assignee (at issue)
TIF Instruments, 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.