Patents by Inventor Lauri Maatta

Lauri Maatta 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).

  • Method for the preparation of a reducing agent composition
    Patent number: 8133460
    Abstract: The invention relates to a method for preparing a reducing agent composition, which is used in the selective catalytic reduction of nitrogen oxides and which contains from 20 to 40% by weight of urea, from 20 to 40% by weight of ammonium formate, and water. The composition is prepared by adding urea to the aqueous solution of ammonium formate that is prepared in situ, and by preparing the aqueous solution of ammonium formate using, as starting materials, a source of ammonium, a source of formate, and water.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: March 13, 2012
    Assignee: Kemira Oyj
    Inventors: Jouko Arvola, Timo Härmä, Eero Hätälä, Lauri Määttä, Timo Nissinen, Pentti Pekonen
  • Method and arrangement for the preparation of percarboxylic acid
    Patent number: 7915445
    Abstract: The invention relates to a method and an arrangement in which a percarboxylic acid product is prepared and used. Conventional methods include refrigerated transport and double storage of the percarboxylic acid product before the consumption thereof at its site of use. These expensive stages have now been eliminated carrying out the preparation in connection with the use.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: March 29, 2011
    Assignee: Kemira Oyj
    Inventors: Lauri Maatta, Seppo Pohjanvesi
  • METHOD FOR THE PREPARATION OF A REDUCING AGENT COMPOSITION
    Publication number: 20100084606
    Abstract: The invention relates to a method for preparing a reducing agent composition, which is used in the selective catalytic reduction of nitrogen oxides and which contains from 20 to 40% by weight of urea, from 20 to 40% by weight of ammonium formate, and water. The composition is prepared by adding urea to the aqueous solution of ammonium formate that is prepared in situ, and by preparing the aqueous solution of ammonium formate using, as starting materials, a source of ammonium, a source of formate, and water.
    Type: Application
    Filed: February 14, 2008
    Publication date: April 8, 2010
    Inventors: Jouko Arvola, Timo Harma, Eero Hatala, Lauri Maatta, Timo Nissinen, Pentti Pekonen
  • Method and arrangement for the preparation of percarboxylic acid
    Publication number: 20050014970
    Abstract: The invention relates to a method and an arrangmement in which a percarboxylic acid product is prepared and used. Conventional methods include refrigerated transport and double storage of the percarboxylic acid product before the consumption thereof at its site of use. These expensive stages have now been eliminated carrying out the preparation in connection with the use.
    Type: Application
    Filed: April 11, 2002
    Publication date: January 20, 2005
    Inventors: Lauri Maatta, Seppo Pohjanvesi