Patents by Inventor Baiwan Wei

Baiwan Wei 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).

  • Method for preparing ultrafine tungsten carbide powder
    Patent number: 8980215
    Abstract: A method for preparing ultrafine powder of tungsten carbide using ultrafine tungsten powder and carbon black as raw materials is provided. The following steps are included: (1) passivation of the ultrafine tungsten powder: passivating the ultrafine tungsten powder under pure carbon dioxide; (2) carbon addition: mixing the ultrafine tungsten powder with carbon black powder after applying cooling water and inert gases; (3) carbonization: synthesizing the bulk tungsten carbide powder at high temperature in a carbonizing stove; (4) crushing and sieving: crushing the bulk tungsten carbide powder, cooling and sieving to obtain the ultrafine powder of tungsten carbide.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: March 17, 2015
    Assignee: Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation
    Inventors: Baiwan Wei, Zhao Lin, Zhifeng Li, Anshi Zou, Yi Wu
  • METHOD FOR PREPARING ULTRAFINE TUNGSTEN CARBIDE POWDER
    Publication number: 20130004407
    Abstract: A method for preparing ultrafine powder of tungsten carbide using ultrafine tungsten powder and carbon black as raw materials is provided. The following steps are included: (1) passivation of the ultrafine tungsten powder: passivating the ultrafine tungsten powder under pure carbon dioxide; (2) carbon addition: mixing the ultrafine tungsten powder with carbon black powder after applying cooling water and inert gases; (3) carbonization: synthesizing the bulk tungsten carbide powder at high temperature in a carbonizing stove; (4) crushing and sieving: crushing the bulk tungsten carbide powder, cooling and sieving to obtain the ultrafine powder of tungsten carbide.
    Type: Application
    Filed: December 30, 2009
    Publication date: January 3, 2013
    Inventors: Baiwan Wei, Zhao Lin, Zhifeng Li, Anshi Zou, Yi Wu