Patents by Inventor Karl E. Hoekstra

Karl E. Hoekstra 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).

  • Laminated glass body with opal phase produced between laminae
    Patent number: 4009318
    Abstract: The instant invention relates to the production of composite glass articles involving the bringing together of two or more glasses, while in the molten state, into an integral unit. More particularly, the present invention is concerned with the manufacture of such articles wherein a reaction occurs at the interface between the laminae of molten glass such that an opal phase is spontaneously produced in situ thereat.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: February 22, 1977
    Assignee: Corning Glass Works
    Inventors: Thomas H. Elmer, Arthur E. Hillman, Karl E. Hoekstra, Robert G. Howell, Herbert E. Rauscher, Charles C. Smith, Jr.