Patents by Inventor Christopher J. Kanters

Christopher J. Kanters 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).

  • Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp
    Patent number: 5118389
    Abstract: A continuous two-stage peroxide bleaching process operated in a single bleach plant for producing a bleached pulp of high brightness, having a second stage bleaching step using a high charge of peroxide followed by a washing stage to recover the residual liquor containing a substantial amount of the applied peroxide. The residual liquor is recycled and used for bleaching in the first stage. Only a portion of the pulp bleached in the first stage is treated in the second stage. Two or more bleached pulp products can be produced simultaneously. The bleached pulp products can be used to form different layers of a multi-layer paper products.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: June 2, 1992
    Assignee: ICI Canada Inc.
    Inventors: Paul Dubelsten, Christopher J. Kanters, John R. Du Manoir