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:
Feb. 10, 1981
Filed:
Sep. 18, 1979
Applicant:
Inventors:
Assignee:
Unitika Ltd., Amagasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; C02F / ; C02F / ;
U.S. Cl.
CPC ...
210688 ; 521 39 ; 528148 ; 528155 ;
Abstract
A phenolic chelate resin comprising the three-dimensional product obtained by cross-linking a phenolic compound represented by the general formula (I): ##STR1## (wherein M is an alkali metal atom, an ammonium group, or a hydrogen atom, and R.sub.1 and R.sub.2, which may be the same or different, each is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms) with a phenol and an aldehyde. The phenolic chelate resin selectively adsorbs ferric ion and/or cupric ion in an acidic aqueous solution at a pH of 3 and less.
Uejima, Hiroyuki. (1981). Phenolic chelate resin and method of adsorption treatment (U.S. Patent No. 4250031). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4250031
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile