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:
Dec. 13, 1988
Filed:
Feb. 13, 1986
Applicant:
Inventors:
Fred C Sittler, Victoria, MN (US);
Adrian C Toy, Eden Prairie, MN (US);
Assignee:
Rosemount Inc., Eden Prairie, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01C / ; H01C / ;
U.S. Cl.
CPC ...
338 25 ; 338308 ;
Abstract
A thin film platinum resistance thermometer capable of operation at elevated temperatures includes a benign dielectric layer covering the thin film platinum resistance temperature sensing element and a barrier layer overlying the dielectric layer. The barrier layer, which is preferrably titanium dioxide, resists diffusion of contaminants which would alter the electrical characteristics of the sensing element, while permitting diffusion of oxygen through the barrier layer.