Patents by Inventor Robert K. Hyatt

Robert K. Hyatt 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 making electrically conductive fibers
    Patent number: 5952099
    Abstract: Electrically conductive thermoplastic fibers are made by spinning a fiber having an electrically conductive sheath of thermoplastic polymer formulated with carbon black and a non-conductive core from the thermoplastic polymer; quenching the fiber after said spinning to a temperature below the melting point of the thermoplastic; drawing the quenched fiber at a draw ratio between about 2.0 and about 3.2; and, after drawing, relaxing the fiber at a temperature below the melting point of the thermoplastic but above its glass transition.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: September 14, 1999
    Assignee: BASF Corporation
    Inventors: Pravin P. Asher, Robert L. Lilly, Grover L. Davenport, Jr., Robert K. Hyatt, Charles H. Rogers
  • Process for making electrically conductive fibers
    Patent number: 5776608
    Abstract: Electrically conductive thermoplastic fibers are made by spinning a fiber having an electrically conductive sheath of thermoplastic polymer formulated with carbon black and a nonconductive core from the thermoplastic polymer; quenching the fiber after said spinning to a temperature below the melting point of the thermoplastic; drawing the quenched fiber at a draw ratio between about 2.0 and about 3.2; and, after drawing, relaxing the fiber at a temperature below the melting point of the thermoplastic but above its glass transition.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: July 7, 1998
    Assignee: BASF Corporation
    Inventors: Pravin P. Asher, Robert L. Lilly, Grover L. Davenport, Jr., Robert K. Hyatt, Charles H. Rogers
  • Process for making electrically conductive fibers
    Patent number: 5698148
    Abstract: Electrically conductive thermoplastic fibers are made by spinning a fiber having an electrically conductive sheath of thermoplastic polymer formulated with carbon black and a non-conductive core from the thermoplastic polymer; quenching the fiber after said spinning to a temperature below the melting point of the thermoplastic; drawing the quenched fiber at a draw ratio between about 2.0 and about 3.2; and, after drawing, relaxing the fiber at a temperature below the melting point of the thermoplastic but above its glass transition.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: December 16, 1997
    Assignee: BASF Corporation
    Inventors: Pravin P. Asher, Robert L. Lilly, Grover L. Davenport, Jr., Robert K. Hyatt, Charles H. Rogers
  • Pay per view television control device
    Patent number: 4358672
    Abstract: A method and apparatus for providing access to an electrically controlled service for perdetermined periods of time employs a dual magnetically striped record medium encoded in a CRB format with data indicative of the periods of time during which access is to be provided. The data is read by a reader and stored in a processor having an internal clock and a comparator for comparing the instantaneous time output of the clock with the predetermined time period data encoded on the record medium for enabling a security device only when the instantaneous time is within the predetermined time period.
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: November 9, 1982
    Assignee: The TeleMine Company, Inc.
    Inventors: Robert K. Hyatt, Robert F. Jacobs