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:
Jun. 26, 2018
Filed:
Jul. 29, 2015
Applicant:
Kyowa Hakko Bio Co., Ltd., Tokyo, JP;
Inventors:
Kazunari Fukumoto, Tokyo, JP;
Masahiro Abe, Tokyo, JP;
Assignee:
KYOWA HAKKO BIO CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07H 7/02 (2006.01);
U.S. Cl.
CPC ...
C07H 7/02 (2013.01); C07B 2200/13 (2013.01);
Abstract
According to the present invention, a crystal of an alkali metal N-acetylneuraminate anhydrate, and a process for producing a crystal of an alkali metal N-acetylneuraminate anhydrate, comprising adding or adding dropwise a solvent selected from the group consisting of alcohols and ketones to an aqueous N-acetylneuraminic acid solution containing an alkali metal-containing compound and having a pH of 3.0 to 9.0 to precipitate a crystal of an alkali metal N-acetylneuraminate anhydrate, and collecting the crystal of an alkali metal N-acetylneuraminate anhydrate from the aqueous solution, can be provided.