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. 19, 2001
Filed:
Nov. 23, 1998
Applicant:
Inventors:
Rosanne W. Slingsby, Pleasanton, CA (US);
Christopher A. Pohl, Union City, CA (US);
Jacek J. Jagodzinski, Redwood City, CA (US);
Latha P. Narayanan, Milpitas, CA (US);
Michael Weitzhandler, Sunnyvale, CA (US);
Assignee:
Dionex Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 4/702 ;
U.S. Cl.
CPC ...
B01J 4/702 ;
Abstract
Anion-exchange compositions are provided comprising anion-exchange functional groups comprising at least a first and a second nitrogen group, wherein the first nitrogen group is a quaternary amine and the second nitrogen group is selected from the group consisting of primary, secondary, tertiary or quaternary amines. Methods of making and using the compositions are also provided.