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:
Nov. 15, 1988
Filed:
Jul. 16, 1987
Applicant:
Inventors:
Peter M Willis, Wallingford, GB;
Ralph L Phillips, Reading, GB;
Assignee:
Johnson Matthey Public Limited Company, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 40 ; 204 461 ; 204 47 ; 204 475 ; 2042 / ; 204291 ; 204292 ; 204293 ; 427436 ;
Abstract
A cathode suitable for use in an electrochemical process evolving hydrogen (for example the chloralkali process) in which the cathode comprises an electrically conductive substrate (1) made of a non-ferrous metal or having a coherent coating of non-ferrous metal on which is provided an electrocatalyst (4) comprising platinum and ruthenium and wherein the cathode is made more poison-resistant by a deposition of gold or silver and, optionally, a further deposition of PTFE. The cathode is particularly resistant to poisoning by iron.