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:
Mar. 29, 2011
Filed:
Feb. 01, 2008
Graham E. C. Bell, Claremont, CA (US);
Clifford G. Moore, Arcadia, CA (US);
Graham E. C. Bell, Claremont, CA (US);
Clifford G. Moore, Arcadia, CA (US);
M. J. Schiff & Associates, Inc., Claremont, CA (US);
Abstract
A thin and narrow electrical resistance corrosion sensor defines measurement, reference and check resistors as abutting serially disposed portions of a thin strip-like metal resistance element, such as a carbon steel or ductile iron element, having metallurgical properties which match those of a corrodible structure of interest such as a pipeline buried in the ground. The resistance element is bonded to a thin, long and narrow nonconductive structural substrate to which is also bonded a flat wire harness which includes conductors connected to the ends of the resistance element and to selected locations of the element between its ends. The resistance element, the substrate, and the wire harness and its connections to the resistance element are encapsulated by a nonconductive protective coating except over the area of the measurement resistor so that such resistor can be exposed to the adjacent environment. The sensor can be used with conventional corrosion measurement instruments. Arrangements for use of plural sensors to measure corrosion due to direct current in a structure of interest, and to measure corrosion due to alternating currents in that structure, also are described.