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:
Jan. 13, 2026
Filed:
Jul. 28, 2021
Applicant:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Inventors:
Michihiro Yuri, Niigata, JP;
Shu Suzuki, Kanagawa, JP;
Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/44 (2006.01); C07C 51/377 (2006.01);
U.S. Cl.
CPC ...
C07C 51/44 (2013.01); C07C 51/377 (2013.01);
Abstract
A method for producing an α-hydroxycarboxylic acid composition includes distilling a mixed solution containing an α-hydroxycarboxylic acid, water, and an organic impurity, wherein the distillation is performed under a condition that an upper limit temperature of a bottoms liquid is 140° C. or lower.