Patents by Inventor Quoc D. Duong

Quoc D. Duong 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).

  • Asphalt composition and process for obtaining same
    Patent number: 5270361
    Abstract: In accordance with the present invention, there is provided an asphalt composition which incorporates asphalt in admixture with synthetic or natural rubber and elemental selenium or an organo-selenium. There is also provided a process for preparing the above asphalt composition. Preferably, the rubber is obtained from waste tires or tubes.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: December 14, 1993
    Assignee: Bitumar R. & D. (2768836 Canada Inc.)
    Inventors: Quoc D. Duong, Rheal Boisvert