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:
Mar. 18, 2008
Filed:
Sep. 27, 2000
Mikito Nishii, Aichi-ken, JP;
Masamine Tanikawa, Okazaki, JP;
Hisanori Watanabe, Shimizu, JP;
Yoshihisa Kurokawa, Shizuoka, JP;
Satoshi Sugiyama, Shimizu, JP;
Kazuhito Yaeda, Shimizu, JP;
Mikito Nishii, Aichi-ken, JP;
Masamine Tanikawa, Okazaki, JP;
Hisanori Watanabe, Shimizu, JP;
Yoshihisa Kurokawa, Shizuoka, JP;
Satoshi Sugiyama, Shimizu, JP;
Kazuhito Yaeda, Shimizu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A coolant used for cooling down a stack of fuel cells includes: a solution mixture of water and a glycol as base material; and a rust-preventive additive that functions to keep an electric conductivity of the coolant at a low level and to maintain a hydrogen ion exponent of the coolant in a substantially neutral level. The rust-preventive agent includes at least one of an alkaline ethanolamine additive, such as triethanolamine, diethanolamine, or monoethanolamine, and an acidic additive selected among the group consisting of triazole compounds, phosphoric acid compounds, and organophosphoric acid compounds.