Patents by Inventor Sverre Storebraten

Sverre Storebraten 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 delignification of chemical wood pulp using sodium sulphite or bisulphite prior to oxygen-alkali treatment
    Patent number: 4560437
    Abstract: In the delignification of chemical wood pulp with oxygen and alkali a larger reduction of the kappa number may be obtained without an increase in the charge of oxygen or alkali, provided the pulp is pretreated with a solution of sulphite or bisulphite in order to introduce hydrophilic groups in the sulphate lignin in the chemical wood pulp.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: December 24, 1985
    Assignee: M. Peterson & Son A/S
    Inventors: Peder J. Kleppe, Sverre Storebraten