Granted Patent
Utility
US 4,464,925 · App. 06/378,662
Hydrogen, deuterium thermal conductivity detector
Inventor:
Richard H. Kolloff
Patented Case
View Patent ↗
Granted: Aug 14, 1984
Filed: May 17, 1982
Inventor
Richard H. Kolloff
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.