Patents by Inventor Marika Seilo

Marika Seilo 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 Deinking Recycled Fibers and Use of an Acid Deinking
    Publication number: 20080264585
    Abstract: The present invention relates to a process for deinking recycled fibers wherein an aqueous pulp suspension with recycled fibers, printing ink and calcium carbonate is provided. The hardness of the suspension is stabilized by causing dissolution of calcium carbonate contained in the suspension or in an aqueous fluid added to the suspension. The increased hardness suspension is subjected to flotation to separate said printing ink from the suspension. The present invention also relates to use of a weak acid for dissolving calcium carbonate and for stabilizing the hardness in a flotation process for the deinking of an aqueous pulp suspension containing said recycled fibers, printing ink and calcium carbonate.
    Type: Application
    Filed: May 17, 2006
    Publication date: October 30, 2008
    Inventors: Hannu Leino, Ulrika Leino, Malena Rennel, Marika Seilo