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:
Apr. 06, 2010
Filed:
Oct. 09, 2007
Takahiko Yoshida, Okazaki, JP;
Minoru Murata, Obu, JP;
Takahiko Yoshida, Okazaki, JP;
Minoru Murata, Obu, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A liquid property sensor for detecting property of liquid includes a semiconductor board, a first electrode and a second electrode, and a protection film. The first and second electrodes are disposed on the semiconductor board to be spaced from each other at a predetermined distance. The protection film has resistance relative to the liquid, and is exposed to the liquid. The first and second electrodes detect a capacitance therebetween as the property of the liquid in accordance with a relative permittivity of the liquid. A capacitance-voltage conversion circuit of the semiconductor board converts the capacitance into a voltage value.