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:
Feb. 20, 1979
Filed:
Oct. 06, 1977
Shinichi Imura, Shin-Nanyo, JP;
Kazuyuki Fukano, Shin-Nanyo, JP;
Toyo Soda Manufacturing Co., Ltd., Yamaguchi, JP;
Abstract
In an apparatus for liquid chromatography the improvement which comprises a chromatographic column packed with a solid packing material comprising porous silica gel particles, having a specific surface area of 5 to 1500 m.sup.2 /g, an average pore diameter of 20 to 2000 A and a crosslinked polymer selected from the group consisting of polystyrene, sulfonated polystyrene, polymethyl methacrylate and polyacrylonitrile coating the surface of the fine holes of the porous silica gel particles in an amount of 5 to 50 wt.% of the polymer to silica gel particles, wherein said crosslinked polymer does not contain any extractable polymer.