Patents by Inventor Ernest A. Sexton

Ernest A. Sexton 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).

  • Ink removal from waste paper
    Patent number: 4076578
    Abstract: Waste paper, particularly newsprint, is treated to release adhering ink particles (e.g. pigment carbon) from the paper fibers, and the ink solids (and organic contaminants) are then preferentially collected on the surface of inserted non-soap solids which have an affinity for, and are of larger size than, the ink solids. The ink-coated solids can be removed from the system by suitable physical means such as hydrocyclones, screens or decantation.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: February 28, 1978
    Assignees: Canadian Patents and Development Limited, The Ontario Paper Company Ltd.
    Inventors: Ira E. Puddington, Bryan D. Sparks, Ernest A. Sexton