Patents by Inventor Susan Sandberg

Susan Sandberg 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 for increasing the wet strength of a tissue material
    Patent number: 6423179
    Abstract: A method increases the wet strength of a tissue material, and a tissue material (2′) which has been subjected to the method. The wet strength agent included in the tissue material (2, 2′) has an intrinsic, normal wet strength-increasing effect which can be achieved by a curing course having chemical reactions and/or physical interactions between different reactive sites of the wet strength agent, between different reactive sites of the cellulose fibres, and reaction and/or interaction between the reactive sites of the wet strength agent and of the cellulose fibres, resulting in a network of polymers which is kept together by bonds.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: July 23, 2002
    Assignee: SCA Hygiene Products AB
    Inventors: Joakim Jardeby, Anna Nihlstrand, Thami Chihani, Susan Sandberg