Patents by Inventor Seppo V. Kauliomaki

Seppo V. Kauliomaki 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).

  • Process for bleaching organic peroxyacid cooked material with an alkaline solution of hydrogen peroxide
    Patent number: 4793898
    Abstract: A lignocellulosic raw material is pulped with a cooking liquor containing organic peroxyacids, such as peroxyformic acid or peroxyacetic acid, and the defibered pulp is bleached with an alkaline solution containing hydrogen peroxide, the pH of which is at least 10 in the beginning of the treatment, and which is provided by adding to a sodium hydroxide solution, hydrogen peroxide in an amount which if calculated as a percent of the dry weight of the material coming to the treatment corresponds to from 0.20 to 0.80, preferably from 0.25 to 0.70 and most preferably from 0.45 to 0.65 times the kappa number of the pulp obtained from the previous stage of the process.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: December 27, 1988
    Assignee: Oy Keskuslaboratorio - Centrallaboratorium Ab
    Inventors: Lauri A. Laamanen, Jorma J. Sundquist, Ilkka Y. P. Wartiovaara, Seppo V. Kauliomaki, Kristiina J. Poppius