Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2007-08-10
2010-11-02
Neckel, Alexa D (Department: 1795)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C205S777500, C257S253000
Reexamination Certificate
active
07824530
ABSTRACT:
An apparatus and method for detecting ionic materials includes a sensing electrode which contacts a liquid sample and detects a sensing voltage corresponding to a surface potential which is changed by a concentration of ionic materials in the liquid sample, a first switching transistor having a first terminal connected to the sensing electrode and a second terminal connected to a first node, a second switching transistor having a first terminal connected to a reset voltage and a second terminal connected to the first node, and a sensing transistor having a gate connected to the first node.
REFERENCES:
patent: 4238757 (1980-12-01), Schenck
patent: 4777019 (1988-10-01), Dandekar
patent: 2004/0134798 (2004-07-01), Toumazou et al.
patent: 2005/0062093 (2005-03-01), Sawada et al.
Kim Seong-jin
Yoo Kyu-tae
Yoon Eui-sik
Cantor & Colburn LLP
Dieterle Jennifer
Neckel Alexa D
Regents of the University of Minnesota
Samsung Electronics Co,. Ltd.
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