Patents by Inventor Leena-Sisko Johansson

Leena-Sisko Johansson 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 improving the water tolerance of bio-based CNF-films
    Patent number: 10786829
    Abstract: The present invention relates to a continuous roll-to-roll process for improving the water tolerance of bio-based polymers, in particular cellulose nanofibrils (CNF) films. Furthermore, the invention provides a method, which combines surface modification/functionalization for improving water stability and wet strength, UV/Ozone treatment, corona treatment or plasma activation for purifying and activating the surface and thus increasing the reaction efficiency, and further hydrophobization of the surface of CNF film.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: September 29, 2020
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Jari Vartiainen, Tero Malm, Vesa Kunnari, Tuomas Hänninen, Tekla Tammelin, Maria Soledad Peresin, Monika Österberg, Leena-Sisko Johansson
  • Method for improving the water tolerance of bio-based CNF-films
    Publication number: 20170266693
    Abstract: The present invention relates to a continuous roll-to-roll process for improving the water tolerance of bio-based polymers, in particular cellulose nanofibrils (CNF) films. Furthermore, the invention provides a method, which combines surface modification/functionalization for improving water stability and wet strength, UV/Ozone treatment, corona treatment or plasma activation for purifying and activating the surface and thus increasing the reaction efficiency, and further hydrophobization of the surface of CNF film.
    Type: Application
    Filed: November 30, 2015
    Publication date: September 21, 2017
    Applicant: Teknologian tutkimuskeskus VTT Oy
    Inventors: Jari Vartiainen, Tero Malm, Vesa Kunnari, Tuomas Hänninen, Tekla Tammelin, Soledad Peresin, Monika Österberg, Leena-Sisko Johansson