Patents by Inventor Erkki Malmsten

Erkki Malmsten 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 controlling an oxygen bleaching
    Patent number: 4840703
    Abstract: A method for controlling an oxygen-bleaching process of lignocellulosic pulp to a desired degree of delignification.The pulp is passed at a substantially constant temperature into a bleaching reactor wherein the pulp has a substantially constant level at its outlet. The hydrostatic pressure is measured and the quantity of oxygen fed into the reactor is adjusted to reach a desired degree of delignification.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: June 20, 1989
    Assignee: Rauma-Repola Oy
    Inventor: Erkki Malmsten