Patents by Inventor Reta ZHU

Reta ZHU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for Preparation of 1,4-Sorbitan in Aqueous Medium
    Publication number: 20220064135
    Abstract: The invention discloses a method for preparation of 1,4-sorbitan by dehydration of D-sorbitol in aqueous medium, wherein one equivalent of water is removed and a cyclization occurs, followed by a treatment with ethanol and isopropanol.
    Type: Application
    Filed: January 16, 2020
    Publication date: March 3, 2022
    Inventors: Jieping Wei, Gesa Paradies, Benjamin Wyler, Dieter Scherer, Yanling Yang, Xiaolong Zhang, Weicheng Jiang, Reta Zhu
  • Method for preparation of 1,4-sorbitan
    Patent number: 11174236
    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.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: November 16, 2021
    Assignees: Lonza Guangzhou Pharmaceutical Ltd., Lonza Ltd
    Inventors: Jieping Wei, Yanling Yang, Daniel Shan, Reta Zhu, Paul Hanselmann, Dieter Scherer
  • Method for Making Polyoxyethylene 1,4 Sorbitan Fatty Acid Ester
    Publication number: 20210324139
    Abstract: The invention discloses a method for preparation of polyoxyethylene 1,4-sorbitan fatty acid ester, such as Polysorbate 80, by a reaction of polyoxyethylene 1,4-sorbitan with a fatty acid chloride, and polyoxyethylene 1,4-sorbitan fatty acid esters obtainable by this method.
    Type: Application
    Filed: September 4, 2019
    Publication date: October 21, 2021
    Inventors: Dieter Scherer, Benjamin Wyler, Jieping Wei, Yanling Yang, Daniel Shan, Reta Zhu, Paul Hanselmann, Tania Kjellerup Lind, Emelie Josefina Nilsson, Vitaly Kocherbitov, Johan Engblom
  • Method for Preparation of 1,4-Sorbitan
    Publication number: 20210261514
    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.
    Type: Application
    Filed: August 26, 2019
    Publication date: August 26, 2021
    Inventors: Jieping WEI, Yanling YANG, Daniel SHAN, Reta ZHU, Paul HANSELMANN, Dieter SCHERER