Patents by Inventor Jonas A. I. Lindhal

Jonas A. I. Lindhal 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 producing improved high-yield pulps
    Patent number: 4938843
    Abstract: Improved chemimechanical, particularly chemithermomechanical, pulp (CTMP), is produced by defibrating or refining wood chips to produce pulp, and then screening the pulp and separating out at least 30% by weight of the incoming fiber suspension as a first long-fiber fraction, and also separating out a first fine-fiber fraction, screening the first fine fiber fraction a second time, and separating out a second long-fiber fraction which is combined with the first long-fiber fraction to form a long-fiber fraction of improved properties, and a second fine-fiber fraction of improved properties.
    Type: Grant
    Filed: February 20, 1985
    Date of Patent: July 3, 1990
    Assignee: Mo och Domsjo Aktiebolag
    Inventor: Jonas A. I. Lindhal