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. 26, 2002
Filed:
Mar. 06, 2000
Radislav Alexandrovich Potyrailo, Niskayuna, NY (US);
Timothy Mark Sivavec, Clifton Park, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method and apparatus for determining chemical properties. The method is based on the sequential measurement of the variation of the oscillation frequency of a single sensing device when different chemically sensitive film materials are deposited on both sides of a resonator such as a quartz crystal microbalance (QCM). Each of the sides of the resonator is sequentially exposed to an analyte while another side is exposed to a blank gas. In this way, the analyte-dependent signal from the resonator is generated only from a single film. Measurements are further made by switching the analyte stream to expose the sensing film on another side of the resonator previously exposed to a blank.