Patents by Inventor Stephen E. Tomko

Stephen E. Tomko 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).

  • Water swellable compositions
    Patent number: 6103317
    Abstract: The invention provides a water-blocking composite comprising a substrate impregnated with or having a coating of a mixture of a radiation-polymerised compound and a water-swellable compound, and method for production thereof.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: August 15, 2000
    Assignee: Glastic Corporation
    Inventors: Toshihiro Asai, Brian L. Swanson, deceased, Stephen E. Tomko, Alan Fernyhough, Michael Fryars