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:
Oct. 23, 1979
Filed:
Apr. 26, 1978
Applicant:
Inventor:
Paul Ruetschi, Yverdon, CH;
Assignee:
Leclanche S.A., Yverdon, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429128 ; 429144 ; 429162 ; 429224 ; 429249 ;
Abstract
An alkaline primary cell comprising a positive electrode having an upper layer, facing the negative electrode, of electrolytic .gamma.-manganese dioxide to which 6-16% of graphite powder having a broad grain-size range has been added as a conducting additive. Disposed beneath this upper layer is at least one further layer containing .gamma.-manganese dioxide, mercuric oxide, or monovalent silver oxide having a higher apparent specific gravity than the upper layer. A separator comprising at least one membrane layer is situated above the positive electrode.