Granted Patent
Utility
US 6,764,780 · App. 09/822,693
Method and apparatus for increasing the temperature of a fuel cell
Inventors:
Joy Roberts, Marian van der Geest, Jean St-Pierre, David P. Wilkinson, Alvin Lee, Stephanie Moroz
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Mar 30, 2001
Inventors
Joy Roberts
Marian van der Geest
Jean St-Pierre
David P. Wilkinson
Alvin Lee
Stephanie Moroz
Assignee (at issue)
BALLARD POWER SYSTEMS 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.