Patents by Inventor Defang Kong

Defang Kong 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).

  • Wolfram carbide based hard alloy and its preparation method
    Patent number: 11208708
    Abstract: A wolfram carbide based hard alloy includes a wolfram carbide base having a first binder. A plurality of hard particles with different sizes are dispersed in the wolfram carbide base, and hardness of the hard particles is larger than hardness of the wolfram carbide base.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: December 28, 2021
    Assignee: ZHUZHOU CEMENTED CARBIDE GROUP CORP. LTD.
    Inventors: Hao Zhang, Zhongjian Zhang, Tao Xu, Weibing Zhang, Defang Kong, Donghua Zhang
  • WOLFRAM CARBIDE BASED HARD ALLOY AND ITS PREPARATION METHOD
    Publication number: 20180209019
    Abstract: A wolfram carbide based hard alloy includes a wolfram carbide base having a first binder. A plurality of hard particles with different sizes are dispersed in the wolfram carbide base, and hardness of the hard particles is larger than hardness of the wolfram carbide base.
    Type: Application
    Filed: November 17, 2015
    Publication date: July 26, 2018
    Applicant: ZHUZHOU CEMENTED CARBIDE GROUP CORP. LTD.
    Inventors: Hao ZHANG, Zhongjian ZHANG, Tao XU, Weibing ZHANG, Defang Kong, Donghua Zhang