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. 30, 2001
Filed:
Sep. 28, 2000
Applicant:
Inventors:
Takashi Horiuchi, Chiba, JP;
Sachiko Matsumoto, Chiba, JP;
Hiroo Matsumoto, Chiba, JP;
Minako Kamikawaji, Tokyo, JP;
Assignee:
Nissan Chemical Industries, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
A61K 3/1501 ; C07D / ;
U.S. Cl.
CPC ...
A61K 3/1501 ; C07D / ;
Abstract
The present invention relates to a 3/2-hydrochloride of 4-chloro-5-[3-(4-benzylpiperazin-1-yl) carbonylmethoxy-4-methoxybenzylamino]-3(2H)-pyridazinone, and also relates to a method for producing the 3/2-hydrochloride of 4-chloro-5-[3-(4-benzylpiperazin-1-yl)carbonylmethoxy-4-methoxy-4-methoxybenzylamino]-3(2H)-pyridazinone which comprises crystallizing in an alcohol type solvent or an alcohol type-ester type mixture solvent in the presence of hydrogen chloride and water.