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:
Dec. 19, 2023
Filed:
Feb. 15, 2021
Dionex Corporation, Sunnyvale, CA (US);
Christopher A. Pohl, Union City, CA (US);
Jinhua Chen, San Jose, CA (US);
Dionex Corporation, Sunnyvale, CA (US);
Abstract
An anion exchange for separating a plurality of carbohydrates includes a negatively charged substrate particle. A base polymer layer includes a first plurality of quaternary amines. The polyalkylpolyamine polymer layer is covalently attached to the base condensation polymer layer. The polyalkylpolyamine polymer layer includes a polymeric branch structure that includes a second plurality of quaternary amines. A density of the second plurality of quaternary amines increases in a direction away from the base condensation polymer layer. The anion exchange stationary phase does not have a hydroxy group spaced apart from any one of the first or the second plurality of quaternary amines by an ethyl group.