Patents by Inventor Leif Elsby

Leif Elsby 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 reducing discoloration and/or tackiness in processing waste paper fibers
    Patent number: 4710267
    Abstract: Waste paper fibers containing tacky impurities processed for the preparation of recycle paper fiber products in the presence of a surface-active tertiary amine or tertiary or quaternary ammonium compound, thereby reducing discoloration and tackiness.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: December 1, 1987
    Assignee: Berol Kemi AB
    Inventors: Leif Elsby, Agneta Carlsson