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:
Nov. 03, 1992
Filed:
Feb. 05, 1991
Eiichi Nakamura, Ibaraki, JP;
Hiroaki Tanaka, Ibaraki, JP;
Yoshiharu Tanaka, Kanagawa, JP;
Takashi Iitake, Kanagawa, JP;
Hiroshi Hoshikawa, Kanagawa, JP;
Fuji Electric Co., Ltd., Kanagawa, JP;
Public Works Research Institute, Ibaraki, JP;
Abstract
A toxic substance-detecting device detects toxic substances in water by use of a microorganism sensor to ascertain the safety of affluents flowing into sewage-treating processes, environmental waters such as rivers, and waters flowing into water purification plants and a water quality-monitoring system employing a detecting device. The device includes a fixed micro-organism membrane and apparatus for circulating a buffer solution of micro-organism substrate and nutrient to one side of the membranne and solutions of water to be examined, standard and cleaning water to the other side.