Patents by Inventor Jill Tolfree

Jill Tolfree 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).

  • Persistent photoconductive coating composition
    Patent number: 4960663
    Abstract: A persistent photoconductive coating composition contains a persistent photoconductor, photoinitiator, an acetate or phenolic hydroxyl containing resin and ketone dispersed in an inert coherent matrix.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: October 2, 1990
    Assignee: Polychrome Corporation
    Inventors: Ken-ichi Shimazu, Jayanti Patel, Jill Tolfree