Patents by Inventor Leif Robertson

Leif Robertson 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 reducing pulp viscosity in production of dissolving pulp
    Patent number: 10513824
    Abstract: The invention relates to a method for reducing pulp viscosity in production of dissolving pulp. The method comprises producing cellulose pulp, whereby the obtained cellulose pulp has a cellulose content of at least 90%, and bleaching the obtained cellulose pulp. The cellulose pulp is treated after bleaching with performic acid.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: December 24, 2019
    Assignee: Kemira Oyj
    Inventors: Leif Robertson, Veli-Matti Vuorenpalo, Jonas Konn, Kaisa Kaski