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:
Aug. 01, 1989
Filed:
Jan. 07, 1988
Masao Endou, Hitachi, JP;
Yamato Asakura, Katsuta, JP;
Atsushi Watanabe, Hitachi, JP;
Masaharu Sakagami, Katsuta, JP;
Shunsuke Uchida, Hitachi, JP;
Makoto Nagase, Hitachi, JP;
Tsutomu Baba, Katsuta, JP;
Katsumi Ohsumi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Electric conductivities of an aqueous solution under measurement are measured at two or more different temperatures in a range To to Tn, and a relationship between the electrical conductivity and the temperatures is obtained. A solute substance in the aqueous solution is determined by applying this relationship against a known temperature and electrical conductivity relationship of an individual substance. A concentration of the determined substance is estimated by applying the electrical conductivity at the lowest temperature To to a known relationship between an electrical conductivity and a concentration at the same temperature To with respect to an individual substance.