Patents by Inventor Luc Van Den Bergh

Luc Van Den Bergh 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).

  • Method of bleaching de-inked pulp and removing the ink particles with steam
    Patent number: 5391261
    Abstract: Deinked paper pulp is subjected to bleaching with sulfite or bisulfite ions and a reducing agent, preferably sodium bisulfite and sodium borohydride in aqueous alkaline solution. To assist the removal of ink particles, steam is bubbled through the pulp causing the ink particles to rise to the surface as a black foam which can be continuously removed.
    Type: Grant
    Filed: April 13, 1993
    Date of Patent: February 21, 1995
    Assignee: Morton International, Inc.
    Inventor: Luc Van Den Bergh