Patents by Inventor Clifford E. Witcher

Clifford E. Witcher 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).

  • Graded polymer optical fibers and process for the manufacture thereof
    Patent number: 5235660
    Abstract: A process for the manufacture of a multi-layer polymer optical fiber having a graded optical refractive index profile. This fiber is comprised of an inner core layer, one or more intermediate layers and an outer clad layer, each layer being extruded from a polymer material. All layers are arranged in a concentric configuration, with the outer clad layer enclosing all other layers.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: August 10, 1993
    Assignee: Peachtree Fiberoptics, Inc.
    Inventors: Gregory A. Perry, Clifford E. Witcher
  • Continuous vulcanization interface control
    Patent number: 4657969
    Abstract: Method of and apparatus for controlling the liquid-steam interface in a continuous vulcanization system which includes the steps of selecting a preferred water-steam interface position within a curing tube, detecting the elevation of water in the tube by a water sensitive sensing means, converting the detected elevation data into a signal, and controlling the position of the interface according to the signal.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: April 14, 1987
    Assignee: Southwire Company
    Inventors: Ronald R. Martin, Clifford E. Witcher, Jr.