Patents by Inventor Birgit Tora Gunvor Karlsson

Birgit Tora Gunvor Karlsson 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).

  • Patent number: 9523014
    Abstract: The invention relates to a process for grinding cellulose ether comprising the steps of: a) grinding a cellulose ether comprising 20 to 90 wt % of water, based on the total weight of cellulose ether and water, and a cationic surfactant in a mill; and b) optionally drying the mixture while grinding, prior to or following the step of grinding.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: December 20, 2016
    Assignee: AKZO NOBEL N.V.
    Inventors: Lars Erik Berglund, Birgit Tora Gunvor Karlsson
  • Publication number: 20080207893
    Abstract: The invention relates to a process for grinding cellulose ether comprising the steps of: a) grinding a cellulose ether comprising 20 to 90 wt % of water, based on the total weight of cellulose ether and water, and a cationic surfactant in a mill; and b) optionally drying the mixture while grinding, prior to or following the step of grinding.
    Type: Application
    Filed: May 9, 2006
    Publication date: August 28, 2008
    Inventors: Lars Erik Berglund, Birgit Tora Gunvor Karlsson
  • Patent number: 4018696
    Abstract: A liquid aqueous detergent composition is provided which contains a surface active portion, and a complexing agent, as well as, if desired, other components customarily included in detergent compositions, characterized in that the surface active portion mainly containsA. 30-70% of a surface active nonionic alkylene oxide adduct having the formulaRO(A).sub.x Hwhere R represents a hydrocarbon group of 8-24 carbon atoms, each A represents independently an oxyalkylene group derived from an alkylene oxide with 2-4 carbon atoms, x represents an integer from 5-50, the number of from ethylene oxide derived oxyalkylene groups being at least 60% of the total number of oxyalkylene groups; andB. 30-70% of a surface active phosphoric acid ester having the common formula(R'O).sub.y PO(OM).sub.3.sub.-ywhere R' is a straight or branched alkyl chain with 9-11 carbon atoms, y is an integer of 1 or 2 and M represents a monovalent cation.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: April 19, 1977
    Assignee: Berol Kemi AB
    Inventors: Karl Martin Edvin Hellsten, Birgit Tora Gunvor Karlsson