Patents by Inventor Rosa Mattsson

Rosa Mattsson 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 sizing paper and sizing composition
    Patent number: 6869471
    Abstract: The present invention relates to a process for sizing paper comprising providing an aqueous suspension comprising cellulosic fibres, dewatering said aqueous suspension thereby forming a paper web, said process comprising adding to the cellulosic suspension an aqueous composition comprising aggregates comprising a sizing agent, the composition obtainable by mixing in any order prior to the addition to the aqueous suspension, (i) an aqueous solution comprising at least one coagulation agent, and (ii) an aqueous dispersion comprising a sizing agent, wherein the zeta potential of the composition is less than 20 mV. The invention also refers to an aqueous sizing composition.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: March 22, 2005
    Assignee: Akzo Nobel N.V.
    Inventors: Lars Ödberg, Rosa Mattsson, Pavol Barla
  • Process for sizing paper and sizing composition
    Publication number: 20030127205
    Abstract: The present invention relates to a process for sizing paper comprising providing an aqueous suspension comprising cellulosic fibres, dewatering said aqueous suspension thereby forming a paper web, said process comprising adding to the cellulosic suspension an aqueous composition comprising aggregates comprising a sizing agent, the composition obtainable by mixing in any order prior to the addition to the aqueous suspension, (i) an aqueous solution comprising at least one coagulation agent, and (ii) an aqueous dispersion comprising a sizing agent, wherein the zeta potential of the composition is less than 20 mV. The invention also refers to an aqueous sizing composition.
    Type: Application
    Filed: November 19, 2002
    Publication date: July 10, 2003
    Inventors: Lars Odberg, Rosa Mattsson, Pavol Barla