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. 03, 2012
Filed:
Oct. 10, 2008
Reinhold Klipper, Cologne, DE;
Hans Karl Soest, Cologne, DE;
Ulrich Litzinger, Hachenburg, DE;
Michael Schelhaas, Cologne, DE;
Georg Martin, Langenfeld, DE;
Reinhold Klipper, Cologne, DE;
Hans Karl Soest, Cologne, DE;
Ulrich Litzinger, Hachenburg, DE;
Michael Schelhaas, Cologne, DE;
Georg Martin, Langenfeld, DE;
LANXESS Deutschland GmbH, Leverkusen, DE;
Abstract
The present invention relates to novel amphoteric ion exchangers which possess not only phthalamide groups of the formula (I) but also —(CH)NRRgroups and/or if appropriate —(CH)NRRRgroups, wherein m is an integer from 1 to 4 and R, R, Rin each case independently of one another are hydrogen, —CH, —CHCH, —CHCHCH, benzyl, —OCHCHor —CHCHOH and X is H or Na or K, to a process for production thereof and also use thereof.