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.:

US 7491468 B1

PDF
Full Text
Expired
Date of Patent:
Feb. 17, 2009

Filed:

Oct. 17, 2003
Applicants:

Shigeto Okada, Fukuoka, JP;

Jun-ichi Yamaki, Kasuga, JP;

Naoki Hatta, Ichihara, JP;

Izumi Uchiyama, Ichihara, JP;

Toshikazu Inaba, Ichihara, JP;

Inventors:

Shigeto Okada, Fukuoka, JP;

Jun-ichi Yamaki, Kasuga, JP;

Naoki Hatta, Ichihara, JP;

Izumi Uchiyama, Ichihara, JP;

Toshikazu Inaba, Ichihara, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/00 (2006.01); H01M 4/58 (2006.01); C01B 15/16 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method for producing a cathode material for a secondary battery, characterized in that it comprises admixing a compound liberating a phosphate ion in a solution (phosphoric acid HPO, phosphorus pentoxide PO, ammonium dihydrogenphosphate NHHPOand the like), water and metallic iron, adding lithium carbonate, lithium hydroxide or a hydrate thereof to the resultant mixture, and firing the resultant reaction product, to thereby synthesize LiFePO.


Find Patent Forward Citations

Okada, Shigeto. (2009). Method for preparing positive electrode material for secondary cell, and secondary cell (U.S. Patent No. 7491468). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7491468

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