Granted Patent
Utility
US 6,454,921 · App. 09/404,119
Electrochemical cell
Inventors:
Alastair M. Hodges, Thomas William Beck, Ian Andrew Maxwell
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Sep 23, 1999
Inventors
Alastair M. Hodges
Thomas William Beck
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.