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:
Jun. 15, 1993
Filed:
Jun. 29, 1990
Applicant:
Inventors:
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 46 ; 429188 ; 429194 ; 429195 ; 429203 ; 429204 ; 429198 ; 429199 ; 2041299 ; 20412995 ; 252 622 ;
Abstract
Improved electrolyte compositions for a phosphoric acid type fuel cell are disclosed, which inhibit the growth of phosphoric acid crystals and which lower the freezing points of the electrolytes so as to prevent the electrolyte from freezing when operation of the fuel cell is stopped at low temperatures.