Patents by Inventor Haifang Zhou

Haifang Zhou 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).

  • Multigrade asphalt power additive
    Patent number: 6770127
    Abstract: An additive composition than can be incorporated into asphalt materials to impart thereto multigrade characteristics. The additive is prepared by reacting together at least one saponifiable organic acid, at least one resin acid, at least one unsaturated organic compound, and an alkali metal base to form a reaction product. Water produced during the reaction is removed as the reaction proceeds. The resulting reaction product can be formed into a powder and combined together with asphalt materials to produce multigrade asphalts.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: August 3, 2004
    Assignee: Shandong Heritage Highway Materials Technologies
    Inventors: Anthony J. Kriech, Herbert L. Wissel, Haifang Zhou, Xuefeng Liu, Feng Xu
  • Multigrade asphalt powder additive
    Publication number: 20030213407
    Abstract: An additive composition than can be incorporated into asphalt materials to impart thereto multigrade characteristics. The additive is prepared by reacting together at least one saponifiable organic acid, at least one resin acid, at least one unsaturated organic compound, and an alkali metal base to form a reaction product. Water produced during the reaction is removed as the reaction proceeds. The resulting reaction product can be formed into a powder and combined together with asphalt materials to produce multigrade asphalts.
    Type: Application
    Filed: May 16, 2002
    Publication date: November 20, 2003
    Inventors: Anthony J. Kriech, Herbert L. Wissel, Haifang Zhou, Xuefeng Liu, Feng Xu