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:
Mar. 22, 2016
Filed:
Apr. 06, 2012
Mitsuhiro Oura, Tokyo, JP;
Hirotsugu Kubo, Tokyo, JP;
Sunao Takeda, Tokyo, JP;
Teruo Okano, Tokyo, JP;
Tatsuya Shimizu, Tokyo, JP;
Mitsuhiro Oura, Tokyo, JP;
Hirotsugu Kubo, Tokyo, JP;
Sunao Takeda, Tokyo, JP;
Teruo Okano, Tokyo, JP;
Tatsuya Shimizu, Tokyo, JP;
NIHON KOHDEN CORPORATION, Tokyo, JP;
TOKYO WOMEN'S MEDICAL UNIVERSITY, Tokyo, JP;
Abstract
A pH measuring method includes: illuminating a medium solution, which includes: a first material; and a second material, with a plurality of light beams, which includes: a first light beam, a wavelength of which corresponds to a first absorption peak; a second light beam, a wavelength of which corresponds to a second absorption peak or a second convergence point; a third light beam, a wavelength of which corresponds to a third absorption peak or a third convergence point; and a fourth light beam, a wavelength of the fourth light beam at which an absorbance of at least one of the first and second materials is converged irrespective of a pH; receiving transmitted or reflected light beams of the first to fourth light beams; measuring absorbances at the wavelengths of the received light beams respectively; and calculating a pH of the medium solution based on the absorbances.