Patents by Inventor Marja Koljonen

Marja Koljonen 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 of enhancing the delignification and/or bleaching of pulp
    Patent number: 5683911
    Abstract: The present invention relates to novel xylanases purified from the microorganism, Microtetraspora flexuosa. Each biochemically unique xylanase is thermostable and has optimal activity in alkaline conditions. The present invention is also directed to methods that utilize either the whole enzyme system or one or more of the above purified thermostable xylanases obtained from Microtetraspora flexuosa. These enzymes are excellent candidates for enhancing the delignification and bleaching of pulp. Furthermore, treating the pulp with the above enzymes prior to bleaching may reduce the amount of chlorine containing and/or peroxide chemicals required in the bleaching process.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: November 4, 1997
    Assignee: Genencor International, Inc.
    Inventors: Elizabeth A. Bodie, William A. Cuevas, Marja Koljonen
  • Five thermostable xylanases from microtetraspora flexuosa for use in delignification and/or bleaching of pulp
    Patent number: 5437992
    Abstract: Five xylanases are purified from the microorganism, Microtetraspora flexuosa,preferably strain ATCC 35864. Each biochemically unique xylanase is thermostable and has optimal activity in alkaline conditions. These enzymes are excellent candidates for enhancing the delignification and bleaching of pulp. Furthermore, treating the pulp with the above enzymes prior to bleaching may reduce the amount of chlorine containing and/or peroxide chemicals required in the bleaching process.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: August 1, 1995
    Assignee: Genencor International, Inc.
    Inventors: Elizabeth A. Bodie, William A. Cuevas, Marja Koljonen