Patents Assigned to Thomas B. Crane
  • Hydrophobic colloidal oxide treated core material, method of production and composition comprised thereof
    Patent number: 4474852
    Abstract: An improved hydrophobic composite is prepared by depositing on a particulate or granular core material an adherent first coat comprising a film-forming polyurethane and, optionally, asphalt, and applying to the thus-coated core material a hydrophobic colloidal oxide, such as hydrophobic fumed silica. The composites are useful in various waterproofing applications, as well as in cleaning up oil spills.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: October 2, 1984
    Assignee: Thomas B. Crane
    Inventor: Charles E. Craig