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. 09, 2010
Filed:
Jul. 23, 2001
Applicants:
Akihiro Shimabayashi, Tokushima, JP;
Shigetoshi Yaguchi, Tokushima, JP;
Inventors:
Akihiro Shimabayashi, Tokushima, JP;
Shigetoshi Yaguchi, Tokushima, JP;
Assignees:
Otsuka Chemical Co., Ltd., Osaka, JP;
Taiho Pharmaceutical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 499/87 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides anhydrous crystals of β-lactam compound represented by the formula: The β-lactam compound of the invention is produced by heating an aqueous solution of a salt of the β-lactam compound and adjusting the pH of the aqueous solution to 3 or lower. The β-lactam compound has excellent storage stability.