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:
Aug. 16, 1977
Filed:
Nov. 18, 1975
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; H01G / ;
U.S. Cl.
CPC ...
148-6 ; 427126 ; 427226 ; 427380 ; 427 80 ; 204 / ; 204 / ; 29 2541 ; 29570 ;
Abstract
A manganese dioxide layer of improved quality is formed on the surface of a dielectric oxide coating on a valve-metal substrate by repeating sequential procedures of immersing the substrate in an aqueous solution of manganese nitrate and heating the wet substrate to cause pyrolytic decomposition of manganese nitrate several times on condition that the heating is carried out at least once in a furnace wherein hot air flows and at least once in a semi-closed radiant furnace wherein the decomposition proceeds under a positive pressure of a small magnitude due to prolonged retention of gaseous decomposition products in the heating chamber.