The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2008
Filed:
Oct. 29, 2002
Hiroshi Igarashi, Toda, JP;
Masamichi Ueda, Kamagaya, JP;
Mitsuo Suzuki, Yokohama, JP;
Shushichi Yoshimura, Tokyo, JP;
Shinichi Kanamaru, Yokkaichi, JP;
Hiroshi Igarashi, Toda, JP;
Masamichi Ueda, Kamagaya, JP;
Mitsuo Suzuki, Yokohama, JP;
Shushichi Yoshimura, Tokyo, JP;
Shinichi Kanamaru, Yokkaichi, JP;
N. E. Chemcat Corporation, Tokyo, JP;
Abstract
A carbon black is provided which is useful as an electrocatalyst carrier. The carbon black has a DBP oil absorption of 170 to 300 cm/100 g, a specific surface area as measured by a BET method of 250 to 400 m/g, a primary particle diameter value of 10 to 17 nm, and a total volume of open pores at the surface which have a pore radius of 10 to 30 nm of 0.40 to 2.0 cm/g. The electrocatalyst can be used in electrochemical devices such as solid polymer electrolyte fuel cells.