Granted Patent
Utility
US 6,492,295 · App. 09/808,032
Composite catalyst for solid polymer electrolyte type fuel cell and processes for producing the same
Inventors:
Shuji Hitomi, Naohiro Tsumura, Shunsuke Mizutani
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Mar 15, 2001
Inventors
Shuji Hitomi
Naohiro Tsumura
Shunsuke Mizutani
Assignee (at issue)
Japan Storage Battery Co., Ltd.
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.