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. 09, 1977
Filed:
Sep. 15, 1975
Carl F Bauer, Chicago, IL (US);
Lawrence B Welsh, Evanston, IL (US);
Karl J Youtsey, Decatur, AL (US);
Frank R Szofran, Des Plaines, IL (US);
Universal Oil Products Company, Des Plaines, IL (US);
Abstract
Oxygen sensor incorporating a thin film electrolyte such as yttria stabilized zirconia sputtered onto a substrate produces an electrical signal in response to differences in oxygen partial pressures. The electrical signal changes rapidly enough for useful operation at temperatures which are substantially lower than those required by conventional oxygen sensors having a rigid, self-supporting thimble, tubular, or disc type electrolyte. For example, rapidly responding signals have been generated at temperatures below 200.degree. C whereas state of the art devices such as those used for sensing exhaust gases in automotive vehicles require temperatures higher than about 400.degree. C.