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. 11, 2005
Filed:
Jun. 04, 2002
Akira Shibuya, Kawasaki, JP;
Yoshio Fujiwara, Kawasaki, JP;
Yoshiaki Miyota, Kawasaki, JP;
Norihito Nishimura, Kawasaki, JP;
Makoto Saito, Kawasaki, JP;
Akira Shibuya, Kawasaki, JP;
Yoshio Fujiwara, Kawasaki, JP;
Yoshiaki Miyota, Kawasaki, JP;
Norihito Nishimura, Kawasaki, JP;
Makoto Saito, Kawasaki, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
The object of the present invention is to produce a 5-alkyl-oxazolidin-2,4-dione by an industrially advantageous method. The invention relates to novel process for producing a high-purity 5-alkyl-oxazolidin-2,4-dione comprising the steps of reacting a 2-hydroxycarboxylic acid amide with a carbonic acid ester in the presence of a metal alcoholate, thereby completing the reaction in one step, and then isolating the reaction product by a neutralization crystallization method.