Patents by Inventor Brian H. Chollar

Brian H. Chollar 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).

  • Compatibilizer for crumb rubber modified asphalt
    Patent number: 6478951
    Abstract: A compatibilizer and process for use in making crumb rubber modified asphalt. The compatibilizer causes the crumb rubber to completely interact with the asphalt, thereby improving the rheological properties of the asphalt and reducing the tendency of pavement made with the asphalt to ravel. The compatibilizer has as its reactive component one or more glycidyl groups; its polymeric backbone can be ethylenic, styrenic, or acrylic or ethylene vinyl acetate (EVA).
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: November 12, 2002
    Assignee: The United States of America as represented by the Secretary of Transportation
    Inventors: Mohamed E. Labib, Brian H. Chollar, G. Mohammed Memon
  • Catalytic process for producing free radicals on crumb rubber
    Patent number: 5762700
    Abstract: Increasing the usable temperature range of asphalts that contain crumb rubber particles by treating the crumb rubber with hydrogen peroxide in the presence of a catalyst such as Fenton's reagent, dioxomolybdenum bis(acetylacetonate), cobalt salt, tall oil, p-toluene sulfonic acid (PTSA), and others.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: June 9, 1998
    Assignee: The United States of America as represented by the Secretary of Transportation
    Inventors: Ghulam M. Memon, Brian H. Chollar