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:
Jul. 05, 2005
Filed:
Nov. 01, 1999
Shigeru Kawahara, Kawasaki, JP;
Akihiro Kishishita, Kawasaki, JP;
Kazutaka Nagashima, Kawasaki, JP;
Tadashi Takemoto, Kawasaki, JP;
Shigeru Kawahara, Kawasaki, JP;
Akihiro Kishishita, Kawasaki, JP;
Kazutaka Nagashima, Kawasaki, JP;
Tadashi Takemoto, Kawasaki, JP;
Ajinomoto Co., Inc., Tokyo, JP;
Abstract
A crystallization process for forming a stable crystal of N-(3,3-dimethylbutyl)-APM, which comprises using either water or a mixture of water with a lower alcohol as the crystallizing solvent and controlling the crystallization point to 30° C. or above; and another crystallization process therefor, which comprises using either water or a mixture of water with a lower alcohol as the crystallizing solvent and using as the seed crystal a crystal of N-(3,3-dimethylbutyl)-APM exhibiting peculiar peaks of diffracted X-ray at least at diffraction angles (2θ, CuKα ray) of 6.0°, 24.8°, 8.2° and 16.5° to thereby crystallize the above objective crystal preferentially. These crystallization processes enable the constant formation of stable crystals of N-(3,3-dimethylbutyl)-APM at a low cost.