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:
Jun. 05, 1979
Filed:
Dec. 23, 1977
Applicant:
Inventors:
Gerrit H van den Berg, Amsterdam, NL;
Wilhelmus Pannekeet, Haarlem, NL;
Kees Koerts, Driebergen, NL;
Robert Smakman, Nigtevecht, NL;
Assignee:
Akzona Incorporated, Asheville, NC (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02B / ;
U.S. Cl.
CPC ...
210 / ; 210 / ;
Abstract
Ferric ions are removed from a concentrated aqueous zinc solution having a pH value in the range of about 0 to about 1.3, by contacting the zinc solution with a cation exchange chelate resin containing aminocarboxylic acid and/or iminodicarboxylic acid groups.