Patents by Inventor Tero Ojala

Tero Ojala 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 catalytic oxidation of cellulose and method for making a cellulose product
    Patent number: 10604589
    Abstract: Cellulose is oxidized catalytically using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical. The oxidation is performed in a reaction medium which is at medium consistency of cellulosic pulp, which is above 6%, more preferably equal to or higher than 8%, and most preferably in the range of 8-12%. The reaction medium is mixed in a reactor through circulation of the reaction medium back to the reactor.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 31, 2020
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Taisto Tienvieri, Isko Kajanto, Tero Ojala, Sami Saarela, Markus Nuopponen, Timo Paakkonen, Tapani Vuorinen
  • METHOD FOR CATALYTIC OXIDATION OF CELLULOSE AND METHOD FOR MAKING A CELLULOSE PRODUCT
    Publication number: 20150322171
    Abstract: Cellulose is oxidized catalytically using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical. The oxidation is performed in a reaction medium which is at medium consistency of cellulosic pulp, which is above 6%, more preferably equal to or higher than 8%, and most preferably in the range of 8-12%. The reaction medium is mixed in a reactor through circulation of the reaction medium back to the reactor.
    Type: Application
    Filed: December 13, 2013
    Publication date: November 12, 2015
    Inventors: Taisto Tienvieri, Isko Kajanto, Tero Ojala, Sami Saarela, Markus Nuopponen, Timo Paakkonen, Tapani Vuorinen