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:
Oct. 03, 1995
Filed:
Nov. 01, 1993
Applicant:
Inventors:
Fabien J Josse, Milwaukee, WI (US);
Zack A Shana, Milwaukee, WI (US);
Assignee:
Marquette University, Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; H01L / ;
U.S. Cl.
CPC ...
310316 ; 310322 ; 310338 ; 73 5425 ;
Abstract
An AT cut quartz crystal resonator has an unbalanced electrode geometry to induce a particularly strong electrical field in a surface of the resonator adjacent a medium. The electrical field will interact with ions and dipoles in the medium and may be used to accurately and repeatably measure the electrical characteristics of the medium. Specific examples are provided illustrating the use of a sensor designed in accord with the invention in sensing dilute electrolytes, and other applications are contemplated.