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:
Apr. 07, 1987
Filed:
Jul. 24, 1985
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C23C / ; B05D / ; B05D / ; G01N / ;
U.S. Cl.
CPC ...
20419215 ; 204421 ; 204424 ; 20419212 ; 427124 ; 427125 ; 4273722 ; 427377 ; 427380 ; 4273835 ;
Abstract
An oxygen sensor for sensing the oxygen content of an exhaust gas from an automotive engine and a process for producing the same, which sensor is less sensitive to lead poisoning than conventional sensors. In the inventive sensor, a first platinum electrode is formed on the side of a solid electrolyte body exposed to the gas to be detected, and a second electrode is formed on the other side of the electrolyte body. The first electrode comprises a platinum layer and a layer of at least one of rhodium and palladium. Preferably, the layer of rhodium or palladium has a thickness of 10 to 5,000 .ANG..