Patents by Inventor Yujia Su

Yujia Su 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).

  • Gas-liquid two-phase atomizing cleaning device and cleaning method
    Patent number: 9460943
    Abstract: The present invention provides a gas-liquid two-phase atomizing cleaning device. The cleaning device comprises a gas-liquid two-phase atomizing spray head. The spray head is a double jacket structure and comprises a nozzle, a rotating arm, a gas guide tube and a liquid guide tube; wherein the nozzle is connected with the rotating arm, the gas guide tube and the liquid guide tube are fixed to the rotating arm, the gas guide tube and the liquid guide tube are both provided with pneumatic valves.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: October 4, 2016
    Assignee: BEIJING SEVENSTAR ELECTRONICS CO., LTD.
    Inventors: Yujia Su, Yi Wu
  • ETCHANT, PREPARATION THEREOF AND METHOD OF USING THE SAME IN THE CLEANING PROCESS
    Publication number: 20150144160
    Abstract: The present invention provides an etchant which is a reaction product of sulfuric acid and ammonium persulfate, wherein the concentration of the ammonium persulfate is 1˜25%, the concentration of the sulfuric acid is 98%. The etchant is produced by adding the ammonium persulfate into the sulfuric acid at a temperature of 100 to 200 degree Celsius. According to the present invention, the ammonium persulfate substitute the conventional oxidizing agent of hydrogen peroxide. Since the ammonium persulfate is in a powder form, the operation becomes more convenient. Furthermore, since sulfuric acid is formed as a by-product instead of water, the etchant will not be diluted after being used for many times, which reduces the production cost.
    Type: Application
    Filed: March 27, 2013
    Publication date: May 28, 2015
    Inventors: Sally Ann Henry, Jintao Huang, Jia Ma, Yi Wu, Yujia Su
  • GAS-LIQUID TWO-PHASE ATOMIZING CLEANING DEVICE AND CLEANING METHOD
    Publication number: 20140311531
    Abstract: The present invention provides a gas-liquid two-phase atomizing cleaning device. The cleaning device comprises a gas-liquid two-phase atomizing spray head. The spray head is a double jacket structure and comprises a nozzle, a rotating arm, a gas guide tube and a liquid guide tube; wherein the nozzle is connected with the rotating arm, the gas guide tube and the liquid guide tube are fixed to the rotating arm, the gas guide tube and the liquid guide tube are both provided with pneumatic valves.
    Type: Application
    Filed: April 1, 2013
    Publication date: October 23, 2014
    Inventors: Yujia Su, Yi Wu