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:
Oct. 06, 1998
Filed:
Mar. 13, 1997
Applicant:
Inventors:
Kaoru Makino, Yamaguchi, JP;
Kazuhiro Kawai, Hyogo, JP;
Masatake Tanimura, Tokyo, JP;
Masao Tamura, Tokyo, JP;
Assignee:
Nippon Rensui Co., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210659 ; 2101982 ;
Abstract
A process for producing purified L-ascorbic acid, which comprises subjecting an aqueous solution of crude L-ascorbic acid to column chromatography using a strongly acidic cation exchange resin; and a method of purifying L-ascorbic acid, which comprises subjecting an aqueous solution of crude L-ascorbic acid to column chromatography using a strongly acidic cation exchange resin.