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:
Feb. 22, 1994
Filed:
Jun. 10, 1991
Applicant:
Inventors:
Takayuki Ito, Tsukuba, JP;
Hideo Katayama, Tsukuba, JP;
Assignee:
Daikin Industries, Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
204402 ; 20415312 ; 20415317 ; 204403 ; 204415 ;
Abstract
A concentration measuring apparatus includes an enzyme electrode which accelerates an oxidation reaction or a reduction reaction of a test substance in a liquid and outputs an electrical signal corresponding to a quantity of the test substance therefrom due to the reaction. The enzyme electrode is supplied with a reviving voltage for removing interfering substances on the enzyme electrode not only prior to concentration measuring but also according to a predetermined time interval. The reviving voltage has a polarity which is the reverse of the voltage used for concentration measurement.