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:
Sep. 11, 1990
Filed:
May. 16, 1989
Applicant:
Inventors:
Hisao Ito, Kawasaki, JP;
Akio Nishi, Kawasaki, JP;
Masasi Miyazawa, Kawasaki, JP;
Masayoshi Naruse, Kawasaki, JP;
Assignee:
Ajinomoto Company, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C / ;
U.S. Cl.
CPC ...
548344 ; 562554 ;
Abstract
A process for isolating and purifying an amino acid, which comprises subjecting an aqueous solution of said amino acid containing impurities composed mainly of at least one member selected from the group consisting of acidic amino acids, lysine, ornithine, citrulline, histidine, PCA, sulfate ions, chloride ions and pigments to ion-exclusion chromatography using a strongly acidic cation exchange resin.