Patents by Inventor Charles E. Craig

Charles E. Craig 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).

  • 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