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:
Jun. 22, 1993
Filed:
Sep. 24, 1991
Harald Fuchs, Carlsberg, DE;
Wolfgang Schrepp, Heidelberg, DE;
Michael Rapp, Sindelfingen, DE;
Siegfried Hunklinger, Heidelberg, DE;
Manfred von Schickfus, Neckargemuend, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A high-sensitivity surface wave gas sensor in which the interaction of a surface wave field with a solid film suitable for adsorbing the gas to be determined causes a change in the frequency of an oscillating circuit containing a surface wave delay line as a function of the type and concentration of the gas entails the delay line provided for adsorption of the gas being completely coated with the solid film, and the dimensions of the delay lines being such that the length of the surface wave transformer is greater than that of the delay line.