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. 19, 1991
Filed:
Apr. 25, 1989
Applicant:
Inventors:
Shinichi Kishimoto, Yokkaichi, JP;
Katsumi Sugiyama, Yokosuka, JP;
Assignee:
Ajinomoto Co., Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562445 ; 560 40 ; 560 41 ;
Abstract
A method for crystallizing alpha-L-aspartyl-L-phenylalanine methyl ester (APM) is disclosed. The APM is crystallized from a C.sub.1 -C.sub.3 -alcohol/water solution (30-80:70-20 (v/v)). The ester crystallized by (i) concentrating the solution, (ii) cooling the solution, (iii) adjusting the water:alcohol ratio, or (iv) a combination thereof.