Patents by Inventor YouQin WU

YouQin WU 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 preparing and separating monodisperse polyethylene glycol
    Patent number: 9630903
    Abstract: A process for preparing and separating a monodisperse polyethylene glycol, including: dissolving a starting material of polyethylene glycol into an organic solvent for reaction with a compound represented by general formula I under catalytic action of an alkaline substance, to prepare a mixture of derivatives of polyethylene glycol having different polarities; separating the mixture of derivatives of polyethylene glycol by means of silica gel column chromatography, to obtain a monodisperse derivative of polyethylene glycol; and hydrolyzing the derivative of polyethylene glycol to obtain a monodisperse polyethylene glycol. The starting material is industrially prepared polyethylene glycol with a wide source and low cost, which provides a guarantee for popularization and application of a monodisperse polyethylene glycol product.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: April 25, 2017
    Assignees: Nanjing Carbonde Tech. Co., Ltd., Opegchem Company, Inc.
    Inventors: Zhuhong Yang, YouQin Wu
  • PROCESS FOR PREPARING AND SEPARATING MONODISPERSE POLYETHYLENE GLYCOL
    Publication number: 20160075624
    Abstract: A process for preparing and separating a monodisperse polyethylene glycol, including: dissolving a starting material of polyethylene glycol into an organic solvent for reaction with a compound represented by general formula I under catalytic action of an alkaline substance, to prepare a mixture of derivatives of polyethylene glycol having different polarities; separating the mixture of derivatives of polyethylene glycol by means of silica gel column chromatography, to obtain a monodisperse derivative of polyethylene glycol; and hydrolyzing the derivative of polyethylene glycol to obtain a monodisperse polyethylene glycol. The starting material is industrially prepared polyethylene glycol with a wide source and low cost, which provides a guarantee for popularization and application of a monodisperse polyethylene glycol product.
    Type: Application
    Filed: September 1, 2015
    Publication date: March 17, 2016
    Inventors: Zhuhong YANG, YouQin WU