Patents by Inventor Maija Jarventausta

Maija Jarventausta 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 dissolving cellulose and a cellulosic product obtained from a solution comprising dissolved cellulose
    Patent number: 8492125
    Abstract: The present invention relates to a method for dissolving cellulose. The method comprises—introducing cellulosic raw material,—treating the cellulosic raw material in an enzymatic treatment process,—mixing the cellulosic raw material after the enzymatic treatment in an aqueous solution in order to obtain an aqueous intermediate product containing the cellulosic raw material of at least 3.5 wt.-%, alkali metal hydroxide between 3.5 wt.-% and 7 wt.-% and zinc salt,—freezing the intermediate product to a solid state, and—melting the frozen intermediate product. The present invention also relates to a cellulosic product obtained from a solution comprising dissolved cellulose.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: July 23, 2013
    Assignee: TTY Saatio
    Inventors: Marianna Vehvilainen, Pertti Nousiainen, Taina Kamppuri, Maija Jarventausta
  • METHOD FOR DISSOLVING CELLULOSE AND A CELLULOSIC PRODUCT OBTAINED FROM A SOLUTION COMPRISING DISSOLVED CELLULOSE
    Publication number: 20110112286
    Abstract: The present invention relates to a method for dissolving cellulose. The method comprises—introducing cellulosic raw material,—treating the cellulosic raw material in an enzymatic treatment process,—mixing the cellulosic raw material after the enzymatic treatment in an aqueous solution in order to obtain an aqueous intermediate product containing the cellulosic raw material of at least 3.5 wt.-%, alkali metal hydroxide between 3.5 wt.-% and 7 wt.-% and zinc salt,—freezing the intermediate product to a solid state, and -melting the frozen intermediate product. The present invention also relates to a cellulosic product obtained from a solution comprising dissolved cellulose.
    Type: Application
    Filed: May 6, 2009
    Publication date: May 12, 2011
    Applicant: TTY SAATIO
    Inventors: Marianna Vehvilainen, Pertti Nousiainen, Taina Kamppuri, Maija Jarventausta