Patents by Inventor Earl C. McCraw, Jr.

Earl C. McCraw, Jr. 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).

  • Process for graft copolymerization on surfaces of preformed substrates to modify surface properties
    Patent number: 4968532
    Abstract: A process for modifying the surface characteristics of a preformed polymeric substrate to impart hydrophilicity, hydrophobicity or other desired properties thereto comprises peroxidizing and hydroperoxidizing the surface of said preformed substrate using ozone, directing the subsequent graft polymerization of selected ethylenically unsaturated monomers essentially solely to the surface of said substrate to achieve the desired alteration of substrate surface characteristics while maintaining substrate structural integrity. Substrates so modified are useful in biomedical devices, semipermeable membranes, films, fibers and especially contact lenses.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: November 6, 1990
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert A. Janssen, Ellen M. Freeman, Earl C. McCraw, Jr.