Patents by Inventor Shiwu Hua

Shiwu Hua 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 PASSIVATING TANTALUM METAL SURFACE AND APPARATUS THEREOF
    Publication number: 20140076462
    Abstract: A method for passivating tantalum metal surface is provided, the method comprises cooling tantalum metal to or below 32° C. and/or passivating tantalum metal surface by oxygen-containing gas with a temperature of 0° C. or below. Also provided is an apparatus for passivating tantalum metal surface for applying the method, comprising a heat treatment furnace, an argon forced-cooling device and/or a device for cooling oxygen-containing gas.
    Type: Application
    Filed: March 23, 2011
    Publication date: March 20, 2014
    Applicant: NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD.
    Inventors: Aiguo Zheng, Yuezhong Ma, Shiping Zheng, Xuecheng Dong, Hongbo Qin, Zhijun Yang, Shiwu Hua, Hui Li, Xudong Xi, Qingsheng Zhang, Shengfang Yang, Yong Jin