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:
Aug. 10, 1999
Filed:
Nov. 05, 1997
Jia-Li Liao, San Pablo, CA (US);
Stellan Hjerten, Uppsala, SE;
Bio-Rad Laboratories, Inc., Hercules, CA (US);
Abstract
A chromatography column with a continuous solid bed spanning the cross section of the column, the bed containing channels large enough for hydrodynamic flow, is prepared by polymerizing a mixture of monomers and ammonium sulfate in an aqueous solution. The monomers include a monofunctional monomer such as a vinyl, allyl, acrylic, or methacrylic compound, and a polyfunctional monomer (i.e., a crosslinker), the total monomer concentration being in the range of 10% to 20% by weight, the mole ratio of crosslinker to total monomer being in the range of 0.3 to 0.4, and the ammonium sulfate having a concentration in the range of 0.4 M to 0.8 M. Functional groups to impart specialized separation capabilities, notably anion and cation exchange, can be included in the monomer mixture.