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:
Jul. 22, 2014
Filed:
Feb. 17, 2010
Applicants:
Ryosuke Nagaoka, Kobe, JP;
Hideaki Izukura, Kobe, JP;
Susumu Tokita, Nishinomiya, JP;
Yuri Shibata, Kobe, JP;
Yoshiyuki Nagaoka, Kobe, JP;
Inventors:
Ryosuke Nagaoka, Kobe, JP;
Hideaki Izukura, Kobe, JP;
Susumu Tokita, Nishinomiya, JP;
Yuri Shibata, Kobe, JP;
Yoshiyuki Nagaoka, Kobe, JP;
Assignee:
Nagaoka & Co., Ltd., Nishinomiya-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 35/12 (2006.01); A23L 1/226 (2006.01); B01D 9/00 (2006.01); C07C 29/78 (2006.01); C11B 9/02 (2006.01);
U.S. Cl.
CPC ...
B01D 9/0013 (2013.01); A23L 1/2265 (2013.01); C07C 29/78 (2013.01); C07B 2200/07 (2013.01); C11B 9/022 (2013.01); C07C 2101/14 (2013.01);
Abstract
Embodiments are provided that provide for efficient production of highly pure natural I-menthol. In some embodiments, a method for preparing natural I-menthol involves providing crude mentha oil in a crystallizer and gradually reducing the temperature of the crystallizer in a step-wise manner, thereby producing highly pure crystals in less than two weeks. The methods disclosed herein are suitable for pharmaceutical GMP.