Patents by Inventor Annikki Vahniäinen

Annikki Vahniäinen 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 AND APPARATUS FOR FIBRILLATION OF CELLULOSE CONTAINING MATERIALS
    Publication number: 20150057442
    Abstract: In a method for manufacturing fibril cellulose, cellulose based fibre raw material is processed mechanically in a refining gap for separating fibrils. The fibres to be refined are subjected to the action of a surface roughness Ra provided by grits elevated from a refining surface delimiting the refining gap, said surface roughness being lower than 3 ?m, advantageously lower than 2 ?m. The refining surface is formed by spraying grits and binder onto a substrate.
    Type: Application
    Filed: June 20, 2012
    Publication date: February 26, 2015
    Applicant: UPM-KYMMENE CORPORATION
    Inventors: Tomas Björkqvist, Sirkka Gustafsson, Timo Koskinen, Markus Nuopponen, Annikki Vahniäinen, Antti Fredrikson