US Patent 7223328 Sensors for reducing gas molecules

Patent 7223328 was granted and assigned to National Center for Scientific Research on May, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

National Center for Scientific Research

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

72233280

Date of Patent

May 29, 2007

Patent Application Number

103432050

Date Filed

July 18, 2001

Patent Primary Examiner

‌

Brian Sines

Patent abstract

Provided is a gas molecule sensor, characterized in that the sensing element is a polycrystalline tin oxide film having a thickness less than 1 μm. The sensing element is produced by electrolytic deposit of a tin film on an insulating support in an electromechanical cell, where the anode is comprised of tin and the cathode is a conductive film applied on the surface of the insulating support at one of its ends, the two electrodes being separated by an electrolyte comprised of a tin salt solution, and by passing a constant current through said cell. The deposit step is followed by an oxidizing step.