Patents by Inventor Xiangqun Wu

Xiangqun Wu 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).

  • Chemically foamed emulsion explosive composition and process for its preparation
    Patent number: 4992118
    Abstract: A water in oil emulsion explosive composition containing inorganic nitrate and the process for its preparation are disclosed. The composition is an explosive mixture which consists of an aqueous inorganic oxidizer salt solution as disperse phase, residual oil and additives as continuous phase, emulsion foamer as occluded bubble producing material, and span-80 as emulsifier. By adjusting the pH of disperse phase and emulsion foamer, the foaming process at elevated temperature is achieved. it is an industrial explosive and has lower production cost, excellent stability, good moisture resistance and low toxicity, and has a storage life longer than 10 months.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: February 12, 1991
    Assignee: Gansu Research Institution of Chemical Industry
    Inventors: Zhonji Peng, Guibao Li, Shiyi Shao, Wenyuan Xu, Xiangqun Wu