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:
Jan. 13, 1998
Filed:
Sep. 27, 1996
Akira Tomizawa, Iruma, JP;
Akinori Shigematsu, Kawagoe, JP;
Hisashi Matsuda, Kodaira, JP;
Naoki Koga, Kitakyushu, JP;
Keisuke Hisada, Kitakyushu, JP;
Snow Brand Milk Products Co., Ltd., Sapporo, JP;
Abstract
Column packings for liquid chromatography comprising porous granules which have hydrophilic surfaces prepared by calcining a crystalline clay mineral having a fibrous structure. Median pore diameter of the porous ceramic granules is in the range of from 0.001 .mu.m to 0.01 .mu.m. The crystalline clay mineral can be sepiolite or attapulgite. The column packings for liquid chromatography have high mechanical strength, are presssure resistant and very stable to elutants having a high pH value and/or a high polarity so that the separating characteristics thereof are not changed even after long use.