Patents by Inventor Carl-Erik Sundman

Carl-Erik Sundman 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 of treating surface of fibreboard with hydrogen peroxide
    Patent number: 6653264
    Abstract: The invention relates to a method for surface treatment of board based on biological fibrous material comprising a step of contacting the surface of said board based on biological fibrous material with an aqueous solution containing hydrogen peroxide. The invention further concerns a composition suitable such treatment.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: November 25, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Carl-Erik Sundman, Pia Hellström, Pär Nilsson
  • Treatment of wood using branched-chain aliphatic carboxylic acids
    Patent number: 4380561
    Abstract: Branched-chain aliphatic carboxylic acids, or their alkali- or ammonium salts, are used for the protection of wood and other cellulose-based materials against attacks of sapstain and mould fungi. The acids contain 6 to 20 carbon atoms and are iso-acids or acids which are mono-branched in 2-position. 2-ethyl hexanoic acid, or its salts, is particularly preferred. The acids are particularly suitable for short-term protection treatment of wood. The acids can be applied in the form of water solutions or dispersions by means of dipping, coating or brushing.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: April 19, 1983
    Assignee: KenoGard A.B.
    Inventors: Carl-Erik Sundman, Bengt G. Hagglund