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:
Nov. 16, 2021
Filed:
Aug. 26, 2019
Applicants:
Lonza Guangzhou Pharmaceutical Ltd., Guangzhou, CN;
Lonza Ltd, Visp, CH;
Inventors:
Jieping Wei, Guangzhou, CN;
Yanling Yang, Guangzhou, CN;
Daniel Shan, Guangzhou, CN;
Reta Zhu, Guangzhou, CN;
Paul Hanselmann, Brig-Glis, CH;
Dieter Scherer, Laufen, CH;
Assignees:
Lonza Guangzhou Pharmaceutical Ltd., Guangzhou, CN;
Lonza Ltd, Visp, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/20 (2006.01);
U.S. Cl.
CPC ...
C07D 307/20 (2013.01);
Abstract
The invention discloses a method for preparation of 1,4-sorbitan by dehydration of D-sorbitol, wherein one equivalent of water is removed and a cyclization occurs, followed by a treatment with ethanol and isopropanol.