Patents by Inventor Yinqiang Li

Yinqiang Li 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).

  • Process for preparation of lactone derivatives and intermediates thereof
    Patent number: 10611739
    Abstract: A novel process for the preparation of lactone derivatives, and intermediates thereof is described. The lactone derivatives are important precursors for the synthesis of anti-hepatitis C virus agents, including sofosbuvir.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: April 7, 2020
    Assignee: PHARMARESOURCES (SHANGHAI) CO., LTD.
    Inventors: Ping Chen, Shaoping Peng, Yinqiang Li, Dafeng Li, Xuejun Dong
  • PROCESS FOR PREPARATION OF LACTONE DERIVATIVES AND INTERMEDIATES THEREOF
    Publication number: 20190210981
    Abstract: A novel process for the preparation of lactone derivatives, and intermediates thereof is described. The lactone derivatives are important precursors for the synthesis of anti-hepatitis C virus agents, including sofosbuvir.
    Type: Application
    Filed: August 16, 2016
    Publication date: July 11, 2019
    Inventors: Ping CHEN, Shaoping PENG, Yinqiang LI, Dafeng LI, Xuejun DONG
  • Novel Process for the Preparation of Rebaudioside D and Other Related Naturally Occurring Sweetners
    Publication number: 20140296499
    Abstract: A novel process for preparation of Rebaudioside D (RD), and other related naturally occurring sweeteners is provided. RD is a natural sweetening agent which can decrease the bitter aftertaste of steviol glycosides. The said process is suitable for commercial manufacturing by using readily available natural products and nontoxic reagents.
    Type: Application
    Filed: December 10, 2012
    Publication date: October 2, 2014
    Inventors: Ping Chen, Yinqiang Li, Shaoping Peng