Patents by Inventor William C. Howard

William C. Howard 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).

  • Bonded metal hydroxide-organic composite polymer films on particulate substrates
    Patent number: 6245323
    Abstract: A lamellar particle is coated with an amorphous metal oxide hydrated gel which is then converted into a hydrophobic metal hydroxide-organic composite polymer film. The resulting product can be combined with a powdery film-forming polymer to produce a film-forming composition which can be applied by electrostatic coating. It also has significantly enhanced performance in plastic masterbatching, hydrophobic cosmetic formulations, and liquid paints and numerous other applications where a hydrophobic pigment is advantageous.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: June 12, 2001
    Assignee: Engelhard Corporation
    Inventors: James D. Christie, William C. Howard