Patents by Inventor Dongchun WANG

Dongchun WANG 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).

  • LYOPHILIZED PREPARATION OF BPA AND PREPARATION METHOD
    Publication number: 20210338588
    Abstract: A method for preparing a lyophilized preparation of BPA includes a solution preparation process and a freeze-drying process, where the solution preparation process includes: (1) dissolving BPA and polyol in an aqueous solution by using a base to obtain a clear solution; (2) regulating the clear solution back to 7.5<pH?8.5 by using an acid, to obtain a BPA solution; and the freeze-drying process includes: (3) subpackaging the BPA solution and freeze-drying under a condition with a vacuum of 10-20 Pa, to obtain the lyophilized preparation. The lyophilized preparation of BPA prepared through the method has good stability and a small content of impurities.
    Type: Application
    Filed: July 14, 2021
    Publication date: November 4, 2021
    Inventors: Yuanhao LIU, Lamei CHEN, Xiaoming WU, Hongfeng JI, Yajing LI, Jing HE, Dongchun WANG
  • Bubble machine
    Patent number: D964472
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: September 20, 2022
    Inventor: Dongchun Wang