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. 18, 2002
Filed:
May. 04, 2001
Manfred Moellendorf, Leonberg, DE;
Heinz Eisenschmid, Hirschlanden, DE;
Falk Herrmann, Leonberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A sensor arrangement for ascertaining physical properties of a liquid is proposed, having electro-acoustical converters ( ) on a substrate ( ) which are wettable with the liquid and are suitable for generating and detecting acoustical surface waves with predetermined wave modes. A Y-rotated quartz slice is used as the substrate ( ), and above the substrate ( ) is a waveguide layer ( ); the standard of the Y rotation of the quartz slice and the material of the waveguide layer ( ) are selected such that an extensive temperature compensation within the range of temperature of the liquid to be investigated is obtained.