Patents by Inventor Taina Korhonen

Taina Korhonen 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 preventing yellowing of lignocellulosic products
    Patent number: 5658431
    Abstract: The invention relates to a method for protecting lignocellulosic material against yellowing caused by light or heat. The invention further concerns brightness stabilizing compositions intended for treatment of lignocellulosic materials. According to the invention, polytetrahydrofuran (PTHF) is used as the brightness stabilizing agent. Preferably PTHF having a molar mass of about 150 to 1500 is used. The invention provides a good stabilization of lignocellulosic pulp and of products containing such pulp, whereby the amount of PTHF required can be extremely small, e.g., 0.05-5% of the weight of the material.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: August 19, 1997
    Assignee: Oy Keskuslaboratorio-Centrallaboratorium AB
    Inventors: Jan Janson, Ingegerd Forssk.ang.hl, Taina Korhonen