Granted Patent
Utility
US 6,258,239 · App. 09/211,336
Process for the manufacture of an electrode for a solid polymer fuel cell
Inventors:
Gabriele Stäb, Peter Urban
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Dec 14, 1998
Inventors
Gabriele Stäb
Peter Urban
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.