Patents by Inventor Greta K. Fossum

Greta K. Fossum 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 the acid bleaching of cellulose pulp with peroxides
    Patent number: 4222819
    Abstract: A process is provided for the acid bleaching of cellulose pulp with peroxides at a pH within the range from about -0.5 to about 3, followed immediately by aqueous alkaline extraction of the dissolvable lignin without intermediate washing.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: September 16, 1980
    Assignee: Mo och Domsjo Aktiebolag
    Inventors: Greta K. Fossum, Sten L. Haggstrom