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.:

US 7063781 B1

Expired

Date of Patent:

Jun. 20, 2006

Filed:

Dec. 11, 2003

Techniques for sensing chloride ions in wet or dry media

Applicants:

George M. Murray, Columbia, MD (US);

Russell P. Cain, Columbia, MD (US);

Bliss G. Carkhuff, Laurel, MD (US);

Francis Weiskopf, Catonsville, MD (US);

Inventors:

George M. Murray, Columbia, MD (US);

Russell P. Cain, Columbia, MD (US);

Bliss G. Carkhuff, Laurel, MD (US);

Francis Weiskopf, Catonsville, MD (US);

Assignee:

The Johns Hopkins University, Baltimore, MD (US);

Attorney:

Albert J. Fasulo, II

Primary Examiner:

Alex Noguerola

Int. Cl.

CPC ...

G01N 27/333 (2006.01);

U.S. Cl.

CPC ...

Abstract

Techniques are provided for measuring chloride ion concentration in a medium. The techniques allow measurements to be made in dry or alkaline media, or both. For alkaline conditions, a sensor includes a pair of electrodes and a polymer film imprinted for uptake of chloride ions under alkaline conditions. The film is deposited to be in contact with at least one electrode and the medium. For dry conditions, a sensor includes a pair of electrodes and a conductive polymer film imprinted for uptake of chloride ions. The film is in contact with the pair of electrodes, and is positioned for contact with the medium. An electrical conductivity of the film depends on an amount of chloride ions taken up by the film. Some techniques allow chloride ion measurements over years at sensors embedded in concrete. Such measurements allow the determination of the progress of rebar corrosion in concrete infrastructure.

Find Patent Forward Citations

Murray, George. (2006). Techniques for sensing chloride ions in wet or dry media (U.S. Patent No. 7063781). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7063781

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