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:
Sep. 03, 2020
Applicant:
Daicel Corporation, Osaka, JP;
Inventors:
Yasuteru Kajikawa, Tokyo, JP;
Yuki Teshima, Tokyo, JP;
Yuuichirou Hirai, Tokyo, JP;
Keisuke Ono, Tokyo, JP;
Midori Umehara, Tokyo, JP;
Tetsuro Nakanishi, Tokyo, JP;
Assignee:
DAICEL CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61Q 19/00 (2006.01); A61K 8/34 (2006.01); C07C 29/141 (2006.01); C07C 29/80 (2006.01); C07C 31/20 (2006.01);
U.S. Cl.
CPC ...
A61K 8/345 (2013.01); A61Q 19/007 (2013.01); C07C 31/207 (2013.01);
Abstract
Provided is a high-purity 1,3-butylene glycol product that is odorless and is unlikely to cause acid concentration increase over time in a state containing water. A 1,3-butylene glycol product, having, according to a gas chromatographic analysis performed under predetermined conditions, a peak area ratio of 100 ppm or lower appearing in a relative retention time ranging from 1.35 to 1.45, provided that the relative retention time for a peak of 1,3-butylene glycol is 1.0.