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:
May. 17, 2016
Filed:
Oct. 29, 2014
Dionex Corporation, Sunnyvale, CA (US);
Thermo Electron Manufacturing Limited, Runcorn, GB;
Thermo Electron Manufacturing Limited, Altrincham, GB;
Dionex Corporation, Sunnyvale, CA (US);
Abstract
A chromatographic material comprising a zwitterionic ligand covalently bound to a substrate, the ligand preferably has a formula II: whereinR, R, Rare independently selected from an oxygen atom that is configured to connect to a substrate atom in the substrate, an oxygen atom that is configured to connect to a silicon atom of an adjacent ligand, a hydroxyl group, a halogen atom, an alkoxy group, a dialkylamino group, an acyl group, an alkyl group, or an aryl group;L, Land Lare independently hydrophobic moieties; each containing 2 to 30 carbon atoms, wherein there are at least 10 carbon atoms in the combined chain lengths of L, Land L;X is an O atom, S atom, amide group or sulfonamide group;n is 0 or 1;R, Rare independently selected from a hydrogen atom or a hydrocarbon moiety containing 1 to 20 carbon atoms; andRis a negatively charged moiety comprising a sulfonic, carboxylic, or phosphonic functional group.