Granted Patent
Utility
US 6,174,420 · App. 09/314,251
Electrochemical cell
Inventors:
Alastair M. Hodges, Thomas William Beck, Oddvar Johansen, Ian Andrew Maxwell
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: May 18, 1999
Inventors
Alastair M. Hodges
Thomas William Beck
Oddvar Johansen
Ian Andrew Maxwell
Assignee (at issue)
USF Filtration and Separations Group, 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.