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:
Mar. 20, 2001
Filed:
Mar. 17, 2000
Applicant:
Inventors:
Koichi Kinoshita, Takasago, JP;
Tadashi Moroshima, Takasago, JP;
Yoshifumi Yanagida, Takasago, JP;
Yoshihide Fuse, Takasago, JP;
Yasuyoshi Ueda, Takasago, JP;
Assignee:
Kaneka Corporation, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07K 5/062 ;
U.S. Cl.
CPC ...
C07K 5/062 ;
Abstract
A process for simply and easily crystallizing a maleate salt of N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanyl-L-proline (enalapril) having a high quality out of an aqueous liquid, which comprises mixing an aqueous liquid having a pH of not less than 4 and containing N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanyl-L-proline, maleic acid and a base with an amount of an acid sufficient to convert substantially all the base into a neutral salt.