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, 1983
Filed:
Jul. 15, 1980
Applicant:
Inventors:
Kasane Yamashita, Kawasaki, JP;
Takao Ikehata, Yokosuka, JP;
Kazuhiko Tate, Yokohama, JP;
Keisuke Nakahara, Yokohama, JP;
Assignee:
Nippon Kokan Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210670 ; 210688 ; 210711 ; 210724 ; 210751 ; 210912 ; 210913 ; 210914 ;
Abstract
A powder of a slag formed at the time of manufacturing steel is used to remove heavy metals contained in waste water. After the use the slag may be heated to recover the heavy metals adsorbed thereby or the used slag may be formed into solid blocks, ballast or aggregate by admixing with Portland cement or alumina cement.