Patents by Inventor Pentti Pirkonen

Pentti Pirkonen 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 concentrating fibril cellulose and fibril cellulose product
    Patent number: 9663588
    Abstract: A method for concentrating fibril cellulose including subjecting aqueous fibril cellulose at a concentration of not higher than 5% to pressure filtration where water is removed from the fibril cellulose by applying pressure to the aqueous fibril cellulose, and continuing the pressure filtration continued to an end point where over 50% of the water initially present is removed from the fibril cellulose. The pressure filtration is performed at a temperature of 30° C. or higher.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: May 30, 2017
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Annikki Vehniäinen, Markus Nuopponen, Pentti Pirkonen, Martina Lille, Hannu Mursunen
  • METHOD FOR CONCENTRATING FIBRIL CELLULOSE AND FIBRIL CELLULOSE PRODUCT
    Publication number: 20140329094
    Abstract: A method for concentrating fibril cellulose including subjecting aqueous fibril cellulose at a concentration of not higher than 5% to pressure filtration where water is removed from the fibril cellulose by applying pressure to the aqueous fibril cellulose, and continuing the pressure filtration continued to an end point where over 50% of the water initially present is removed from the fibril cellulose. The pressure filtration is performed at a temperature of 30° C. or higher.
    Type: Application
    Filed: February 13, 2013
    Publication date: November 6, 2014
    Applicant: UPM-KYMMENE CORPORATION
    Inventors: Annikki Vehniäinen, Markus Nuopponen, Pentti Pirkonen, Martina Lille, Hannu Mursunen
  • Apparatus for cleaning a filter surface
    Patent number: 6284136
    Abstract: The invention relates to a method and apparatus for cleaning the filter surface (2, 3) of a filter medium in a suction drier. According to the invention, in order to mark the surface to be cleaned, in contact with the surface to be cleaned there is set a sealing surface (4) that forms an essentially closed space for the surface to be cleaned, and that into said closed space, there is conducted cleaning liquid (7) in order to carry out the cleaning.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: September 4, 2001
    Assignee: Outokumpu Oyj
    Inventors: Timo Tuori, Hannu Sekki, Jorma Ihalainen, Pentti Pirkonen, Hannu Mursunen
  • Combined ultrasonic cleaning and washing of filter disks
    Patent number: 6217782
    Abstract: The invention relates to a method and apparatus for cleaning the filter surface (2, 3) of a filter medium in a suction drier. According to the invention, in order to mark the surface to be cleaned, in contact with the surface to be cleaned there is set a sealing surface (4) that forms an essentially closed space for the surface to be cleaned, and that into said closed space, there is conducted cleaning liquid (7) in order to carry out the cleaning.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: April 17, 2001
    Assignee: Outokumpu Oyj
    Inventors: Timo Tuori, Hannu Sekki, Jorma Ihalainen, Pentti Pirkonen, Hannu Mursunen