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:
Feb. 26, 2008
Filed:
Sep. 28, 2005
Applicants:
Tatsuji Numata, Tokyo, JP;
Yoshitada Tomioka, Tokyo, JP;
Inventors:
Tatsuji Numata, Tokyo, JP;
Yoshitada Tomioka, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A positive electrode active material containing lithium manganate having a spinel structure is used, wherein the value of a* of the L*a*b* color specification system is made to satisfy the requirement: −3.2 ≦a*≦−1.4. Or, the value of a* is made to satisfy the requirement: −5.8 23 a*≦−4.2. Or, the value of L* is made to satisfy the requirement: 24 ≦L*≦27.
Numata, Tatsuji. (2008). Positive electrode active material for a secondary battery, secondary battery and process of manufacturing positive electrode active material for a secondary battery (U.S. Patent No. 7335444). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7335444
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile