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:
Jul. 20, 1976
Filed:
Dec. 23, 1974
Applicant:
Inventors:
Goro Matsui, Hiroshima, JA;
Koji Toda, Hiroshima, JA;
Nanao Horiishi, Hiroshima, JA;
Kazuyoshi Wakimoto, Hiroshima, JA;
Yoshifumi Nishiyama, Hiroshima, JA;
Tsuneyoshi Taketa, Hiroshima, JA;
Kazushi Takama, Hiroshima, JA;
Assignee:
Toda Kogyo Corporation, Hiroshima, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
423140 ; 252 6256 ; 423151 ; 423632 ; 423633 ; 423634 ;
Abstract
The processes for producing iron oxide products from a solution of ferrous salts selected from the group consisting of waste liquid containing ferrous salts and aqueous solution in which ferrous salts obtained from the waste liquid are dissolved, under the acid, wet and high ferrous concentration conditions. More particularly, the processes for purifying said waste liquids comprising the bivalent iron removing steps.