Patents by Inventor Zhangong Dong

Zhangong Dong 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 a tantalum powder
    Patent number: 9199307
    Abstract: The present invention relates to the tantalum powder and the process for preparing the same, and also relates to the electrolytic capacitor anode made of the tantalum powder. More particularly, the present invention relates to the tantalum powder having a BET surface area not more than 0.530 m2/g, Fisher mean particle size not less than 3.00 ?m. The present invention relates to the process for preparing the tantalum powder, wherein the tantalum powder is prepared through reducing tantalum compound with a reducing agent, wherein the tantalum powder as seed is added during reduction, and said tantalum powder as seed is the tantalum powder that has been milled.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 1, 2015
    Assignee: Ningxia Orient Tantalum Industry Co., Ltd.
    Inventors: Guoqi Yang, Wenfeng Shi, Xifang Bao, Yong Li, Zhongxiang Li, Zhangong Dong, Xiaoyan Yang
  • METHOD FOR PREPARING A TANTALUM POWDER
    Publication number: 20120291593
    Abstract: The present invention relates to the tantalum powder and the process for preparing the same, and also relates to the electrolytic capacitor anode made of the tantalum powder. More particularly, the present invention relates to the tantalum powder having a BET surface area not more than 0.530 m2/g, Fisher mean particle size not less than 3.00 ?m. The present invention relates to the process for preparing the tantalum powder, wherein the tantalum powder is prepared through reducing tantalum compound with a reducing agent, wherein the tantalum powder as seed is added during reduction, and said tantalum powder as seed is the tantalum powder that has been milled.
    Type: Application
    Filed: August 2, 2012
    Publication date: November 22, 2012
    Inventors: Guoqi Yang, Wenfeng Shi, Xifang Bao, Yong Li, Zhongxiang Li, Zhangong Dong, Xiaoyan Yang
  • TANTALUM POWDER, METHOD FOR PREPARING THE SAME, AND ELECTROLYTIC CAPACITOR ANODE MADE OF THE TANTALUM POWDER
    Publication number: 20100226070
    Abstract: The present invention relates to the tantalum powder and the process for preparing the same, and also relates to the electrolytic capacitor anode made of the tantalum powder. More particularly, the present invention relates to the tantalum powder having a BET surface area not more than 0.530 m2/g, Fisher mean particle size not less than 3.00 ?m. The present invention relates to the process for preparing the tantalum powder, wherein the tantalum powder is prepared through reducing tantalum compound with a reducing agent, wherein the tantalum powder as seed is added during reduction, and said tantalum powder as seed is the tantalum powder that has been milled.
    Type: Application
    Filed: March 5, 2010
    Publication date: September 9, 2010
    Inventors: Guoqi Yang, Wenfeng Shi, Xifang Bao, Yong Li, Zhongxiang Li, Zhangong Dong, Xiaoyan Yang