Patents by Inventor Guochao Chu

Guochao Chu 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).

  • Liquid replenishing device
    Patent number: 9275880
    Abstract: The present invention provides a liquid replenishing device comprising a liquid storage tank, a chemical liquid supply pipeline, an ultrapure water supply pipeline, an ultrapure water quantitative supplement pipeline and a circulating pipeline. The chemical liquid supply pipeline supplies chemical liquids to the liquid storage tank. The ultrapure water supply pipeline supplies ultrapure water to the liquid storage tank. The ultrapure water quantitative supplement pipeline quantitatively replenishes ultrapure water to the liquid storage tank. One end of the circulating pipeline is connected with the outlet of the liquid storage tank, the other end of the circulating pipeline is connected with the inlet of the liquid storage tank.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: March 1, 2016
    Assignee: BEIJING SEVENSTAR ELECTRONICS CO., LTD.
    Inventors: Guochao Chu, Jinqun He, Yingying Wang, Likun Pei
  • LIQUID REPLENISHING DEVICE
    Publication number: 20140305515
    Abstract: The present invention provides a liquid replenishing device comprising a liquid storage tank, a chemical liquid supply pipeline, an ultrapure water supply pipeline, an ultrapure water quantitative supplement pipeline and a circulating pipeline. The chemical liquid supply pipeline supplies chemical liquids to the liquid storage tank. The ultrapure water supply pipeline supplies ultrapure water to the liquid storage tank. The ultrapure water quantitative supplement pipeline quantitatively replenishes ultrapure water to the liquid storage tank. One end of the circulating pipeline is connected with the outlet of the liquid storage tank, the other end of the circulating pipeline is connected with the inlet of the liquid storage tank.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 16, 2014
    Inventors: Guochao Chu, Jinqun He, Yingying Wang, Likun Pei