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:
May. 01, 1990
Filed:
Jun. 24, 1988
Applicant:
Inventors:
Andre Walker, Lexington, MA (US);
Terrence F Reise, Winston-Salem, NC (US);
Assignee:
Duracell Inc., Bethel, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; H01M / ;
U.S. Cl.
CPC ...
423605 ; 429224 ;
Abstract
The present invention relates to an improved process for producing beta manganese dioxide and for producing cathodes from said manganese dioxide. The process comprises heating gamma manganese dioxide at at least 450.degree. C. for up to one hour in order to convert a majority of the gamma manganese dioxide to the beta phase without forming detrimental amounts of lower oxides.