Patents by Inventor Anna Asplund

Anna Asplund 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 production of paper
    Patent number: 7442280
    Abstract: A process for the production of paper from a suspension containing cellulosic fibers, and optional fillers, which comprises adding to the suspension a drainage and retention aid comprising a cationic organic polymer, forming and dewatering the suspension on a wire, wherein the cationic organic polymer has an aromatic group and the suspension which is dewatered on the wire has a conductivity of at least 2.0 mS/cm.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: October 28, 2008
    Assignee: Akzo Nobel NV
    Inventors: Bore Klemets, Hans Hallstrom, Anna Asplund, Rein Sikkar
  • Process for the production of paper
    Patent number: 6103064
    Abstract: The invention relates to a process for the production of paper from a suspension of cellulose containing fibres, and optional fillers, which comprises adding a water-soluble cationic or amphoteric branched acrylamide-based polymer and an anionic aluminium-containing silica sol to the suspension and forming and draining the suspension on a wire.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: August 15, 2000
    Assignee: Eka Chemicals AB
    Inventors: Anna Asplund, Kjell Andersson, Erik Lindgren