Patents by Inventor Gunvor Karlsson

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
  • Patent number: 7534760
    Abstract: The present invention relates to a clear and stable, highly alkaline composition with controlled foaming, containing a high amount of surface active nonionic alkylene oxide adduct and a hexyl glycoside as a hydrotrope. This composition has a very good wetting and cleaning ability and can be used for cleaning of hard surfaces, in a mercerization process and for a cleaning, desizing or scouring process of fibres and fabrics.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: May 19, 2009
    Assignee: Akzo Nobel N.V.
    Inventors: Ingegard Johansson, Bo Karlsson, Christine Strandberg, Gunvor Karlsson, Karin Hammarstrand
  • 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
  • Publication number: 20050215462
    Abstract: The present invention relates to a clear and stable, highly alkaline composition with controlled foaming, containing a high amount of surface active nonionic alkylene oxide adduct and a hexyl glycoside as a hydrotrope. This composition has a very good wetting and cleaning ability and can be used for cleaning of hard surfaces, in a mercerization process and for a cleaning, desizing or scouring process of fibres and fabrics.
    Type: Application
    Filed: May 13, 2005
    Publication date: September 29, 2005
    Inventors: Ingegard Johansson, Bo Karlsson, Christine Strandberg, Gunvor Karlsson, Karin Hammarstrand
  • Patent number: 6639066
    Abstract: This invention relates to a suspension of a water-soluble, nonionic cellulose ether having a fairly low content of an electrolytic salt exhibiting a high stability and a low viscosity. The suspension having a pH-value of below 8.0, contains 10-30% by weight of a water-soluble, nonionic cellulose ether, and 10-22% by weight of an electrolytic salt, wherein the electrolytic salt contains a) 10-90% by weight of a salt of polyphosphate having 3-12 phosphate groups, and b) 10-90% by weight of a salt selected from the group consisting of ortophosphate, pyrophosphate, sulphate, carbonate and a mixture thereof. The suspension is advantageously produced by adding a dry blend containing the water-soluble cellulose ether in cross-linked form and the electrolytic salt to water.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: October 28, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Peter Boström, Gunvor Karlsson
  • Publication number: 20030162686
    Abstract: The present invention relates to a clear and stable, highly alkaline composition with controlled foaming, containing a high amount of surface active nonionic alkylene oxide adduct and a hexyl glycoside as a hydrotrope. This composition has a very good wetting and cleaning ability and can be used for cleaning of hard surfaces, in a mercerization process and for a cleaning, desizing or scouring process of fibres and fabrics.
    Type: Application
    Filed: January 15, 2003
    Publication date: August 28, 2003
    Inventors: Ingegard Johansson, Bo Karlsson, Christine Strandberg, Gunvor Karlsson, Karin Hammarstrand
  • Patent number: 6541442
    Abstract: The present invention relates to a clear and stable, highly alkaline composition with controlled foaming, containing a high amount of surface active nonionic alkylene oxide adduct and a hexyl glycoside as a hydrotrope. This composition has a very good wetting and cleaning ability and can be used for cleaning of hard surfaces, in a mercerization process and for a cleaning, desizing or scouring process of fibres and fabrics.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: April 1, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Ingegard Johansson, Bo Karlsson, Christine Strandberg, Gunvor Karlsson, Karin Hammarstrand
  • Publication number: 20020121224
    Abstract: This invention relates to a suspension of a water-soluble, nonionic cellulose ether having a fairly low content of an electrolytic salt exhibiting a high stability and a low viscosity. The suspension having a pH-value of below 8.
    Type: Application
    Filed: December 12, 2001
    Publication date: September 5, 2002
    Inventors: Peter Bostrom, Gunvor Karlsson
  • Patent number: 6080716
    Abstract: The present invention relates to the use of an amphoteric compound as solubilizer and discloses an alkaline concentrate in the form of a clear aqueous solution which, after diluting with water, is suitable for use as detergent and which contains as least 4% by weight of a nonionic alkoxylate surfactant containing 2-12, preferably 3-10 alkyleneoxy groups having 2-4 carbon atoms, at least 50% of the alkyleneoxy groups being ethyleneoxy groups, at least 13% of a complexing agent, and 1-15% by weight of an amphoteric compound.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: June 27, 2000
    Assignee: Akzo Nobel N.V.
    Inventors: Rolf Skold, Gunvor Karlsson, Karin Hammarstrand
  • 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