Patents by Inventor Yafeng Du

Yafeng Du 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).

  • Methods for preparation of propylene polymers
    Patent number: 9751965
    Abstract: Disclosed herein is a polymerization method of propylene, which can prepare a propylene homopolymer with both high fluidity and high rigidity as well as a propylene/?-define copolymer having both high fluidity and a good rigidity-toughness balance by, for example, control of polymerization steps and elevation of polymerization temperature, while the catalyst still maintains a relatively high polymerization activity.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: September 5, 2017
    Assignees: China Petroleum & Chemical Corporation, Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
    Inventors: Luqiang Yu, Zhichao Yang, Jiangbo Chen, Jianxin Zhang, Yafeng Du, Qinyu Tong, Kang Sun, Yang Liu, Jie Zou, Lusheng Wang, Zengyue Dai, Zhong Tan
  • METHODS FOR PREPARATION OF PROPYLENE POLYMERS
    Publication number: 20140121337
    Abstract: Disclosed herein is a polymerization method of propylene, which can prepare a propylene homopolymer with both high fluidity and high rigidity as well as a propylene/?-define copolymer having both high fluidity and a good rigidity-toughness balance by, for example, control of polymerization steps and elevation of polymerization temperature, while the catalyst still maintains a relatively high polymerization activity.
    Type: Application
    Filed: October 30, 2013
    Publication date: May 1, 2014
    Applicants: BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORP, CNINA PETROLEUM & CHEMICAL CORPORATION
    Inventors: Luqiang YU, Zhichao Yang, Jiangbo Chen, Jianxin Zhang, Yafeng Du, Qinyu Tong, Kang Sun, Yang Liu, Jie Zou, Lusheng Wang, Zengyue Dai, Zhong Tan
  • Mirror
    Patent number: D923945
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: July 6, 2021
    Inventor: Yafeng Du
  • Mirror
    Patent number: D923947
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: July 6, 2021
    Inventor: Yafeng Du
  • Mirror
    Patent number: D935102
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: November 2, 2021
    Inventor: Yafeng Du