Patents by Inventor Qiu BI

Qiu BI 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).

  • Low-cost lead-free dezincification-resistant brass alloy for casting
    Patent number: 11028465
    Abstract: A low-cost lead-free dezincification corrosion-resistant brass alloy for casting. The brass alloy contains: 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.05-0.8 wt. % of Al, 0-0.1 wt. % of Sn, and 0.05-0.16 wt. % of As, with the balance being Zn and inevitable impurities. Moreover, the equivalent weight of zinc X meets the requirements of the following formula: 35%<X<39.5%, and X=(B+?CiKi/(A+B+?CiKi); in the formula, X is the equivalent weight of zinc in the complex brass, A is the copper content (%), B is the actual zinc content (%), Ci is the content (%) of the other alloy elements, and CiKi is the corresponding equivalent weight of zinc of various elements.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: June 8, 2021
    Inventors: Zhenqing Hu, Qiu Bi, Jia Long, Yuanhao Cheng, Huawei Zhang, Qing Lv
  • LOW-COST LEAD-FREE DEZINCIFICATION-RESISTANT BRASS ALLOY FOR CASTING
    Publication number: 20180371581
    Abstract: A low-cost lead-free dezincification corrosion-resistant brass alloy for casting. The brass alloy contains: 60-65 wt. % of Cu, 0.05-0.25 wt. % of Pb, 0.05-0.8 wt. % of Al, 0-0.1 wt. % of Sn, and 0.05-0.16 wt. % of As, with the balance being Zn and inevitable impurities. Moreover, the equivalent weight of zinc X meets the requirements of the following formula: 35%<X<39.5%, and X=(B+?CiKi/(A+B+?CiKi); in the formula, X is the equivalent weight of zinc in the complex brass, A is the copper content (%), B is the actual zinc content (%), Ci is the content (%) of the other alloy elements, and CiKi is the corresponding equivalent weight of zinc of various elements.
    Type: Application
    Filed: December 21, 2016
    Publication date: December 27, 2018
    Applicant: XIAMEN LOTA INTERNATIONAL CO., LTD
    Inventors: Zhenqing HU, Qiu BI, Jia LONG, Yuanhao CHENG, Huawei ZHANG, Qing LV