Patents by Inventor Pavol Barla

Pavol Barla 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).

  • Papermaking process
    Patent number: 7682485
    Abstract: The present invention relates to a process for improving the absorption rate for paper products. The process comprises treating a cellulosic fiber web comprising applying to said cellulosic fiber web at least one polymer; and colloidal particles.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: March 23, 2010
    Assignee: Akzo Nobel N.V.
    Inventor: Pavol Barla
  • Papermaking process
    Publication number: 20070131369
    Abstract: The present invention relates to a process for improving the absorption rate for paper products. The process comprises treating a cellulosic fibre web comprising applying to said cellulosic fibre web at least one polymer; and colloidal particles.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 14, 2007
    Applicant: AKZO NOBEL N.V.
    Inventor: Pavol Barla
  • 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
  • Papermaking process
    Patent number: 4980025
    Abstract: In a process for making paper from an aqueous paper pulp, especially a pulp containing bleached/unbleached mechanical pulps or unbleached chemical pulps, a combination of chemicals is added for improving drainage and retention. As drainage-and retention-improving aids are added a cationic polyacrylamide and a sol of colloidal inorganic particles having at least one surface layer of aluminium silicate or aluminum-modified silicic acid.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: December 25, 1990
    Assignee: Eka Nobel AB
    Inventors: Kjell R. Andersson, Pavol Barla, Johnny Yrjans