logo

For the Inventor, By the Inventor

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.:

US 11077403 B1

PDFFull Text
Date of Patent:
Aug. 03, 2021

Filed:

Sep. 15, 2017

Water treatment method

Applicant:

Kurita Water Industries Ltd., Tokyo, JP;

Inventors:

Hidekuni Kameda, Tokyo, JP;

Kazuki Ishii, Tokyo, JP;

Yaozhen Chen, Tokyo, JP;

Assignee:

KURITA WATER INDUSTRIES LTD., Tokyo, JP;

Attorney:

Manabu Kanesaka

Primary Examiner:

Clare M Perrin

Int. Cl.
CPC ...
B01D 61/04 (2006.01); C02F 1/44 (2006.01); C02F 1/56 (2006.01); B01D 21/01 (2006.01); B03D 3/02 (2006.01); B03D 3/06 (2006.01); C02F 1/52 (2006.01); C02F 9/00 (2006.01); C02F 1/66 (2006.01); C02F 1/42 (2006.01); C02F 1/76 (2006.01); C02F 1/28 (2006.01);
U.S. Cl.
CPC ...
B01D 61/04 (2013.01); B01D 21/01 (2013.01); B03D 3/02 (2013.01); B03D 3/06 (2013.01); C02F 1/44 (2013.01); C02F 1/5245 (2013.01); C02F 1/56 (2013.01); B01D 2311/04 (2013.01); C02F 9/00 (2013.01); C02F 2301/08 (2013.01); C02F 2303/22 (2013.01); C02F 2305/02 (2013.01);
Abstract

A method for treating water, the method including adding, as coagulants, a polymer compound having a phenolic hydroxyl group and an iron-based coagulant to water to be treated, filtering the coagulated water with a clarification filter, and subjecting the filtered water to a reverse osmosis membrane treatment, wherein the addition of the coagulants is controlled such that a ratio between an addition concentration of the polymer compound having a phenolic hydroxyl group and an addition concentration of the iron-based coagulant is constant.

Find Patent Forward Citations

Kameda, Hidekuni. (2021). Water treatment method (U.S. Patent No. 11077403). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11077403

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…