Patents by Inventor Anne R. Spell

Anne R. Spell 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).

  • Modification of asphalt
    Patent number: H1250
    Abstract: A bituminous composition comprising: (a) a bitumen, (b) a block copolymer of at least one conjugated diolefin and at least one vinyl aromatic hydrocarbon, and (c) a thermoplastic or low crystallinity polymer.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: November 2, 1993
    Assignee: Shell Oil Company
    Inventors: Dennis W. Gilmore, Anne R. Spell, Richard Gelles, James H. Collins, Mark A. Berggren, Mark G. Bouldin