Patents by Inventor Ari Kärki

Ari Kärki 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).

  • Separation of sugars, sugar alcohols, carbohydrates and mixtures thereof
    Patent number: 7361273
    Abstract: The present invention relates to a method of separating sugars and sugar alcohols from each other. More particularly the present invention relates to the use of a weakly basic anion exchange resin in a chromatographic separation process. The advantage of the present invention compared with the prior art is that it is especially suitable for separating reducing sugars in acidic conditions as well as for example in weakly acidic conditions. The method using chromatographic separation comprises at least one step where a weakly basic anion exchange resin is used in a chromatographic column or in a part of a column.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: April 22, 2008
    Assignee: SaniscoSweetners Oy
    Inventors: Heikki Heikkilä, Päivi Sarmala, Ari Kärki, Nina Nurmi, Hannu Paananen
  • Separation system and process
    Patent number: 7060188
    Abstract: The invention relates to a system and a process for fractionating a solution into two or more fractions. The system of the invention comprises at least two compartments having a diameter of at least about one meter and including a uniform packing of a polymer-based ion exchange resin with a bead size in the range of about 50 to about 250 ?m. The mixing volume of the fluid fronts in the system of the invention is not more than 5% of the volume of the compartment.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: June 13, 2006
    Assignee: Finnfeeds Finland Oy
    Inventors: Hannu Paananen, Jarmo Kuisma, Heikki Heikkilä, Vili Ravanko, Jari Lewandowski, Ari Kärki
  • Use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates
    Patent number: 6924371
    Abstract: The invention relates to the use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates. In the invention the hydrophilic/hydrophobic interaction of carbohydrates, sugars and sugar alcohols with the weakly acid cation exchange resin is utilized. The weakly acid cation exchange resin is used for separation of hydrophobic saccharides, such as deoxy, methyl and anhydrosugars and anhydrosugaralcohols from more hydrophilic saccharides.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: August 2, 2005
    Assignee: Danisco Sweeteners Oy
    Inventors: Ari Kärki, Heikki Heikkilä, Juho Jumppanen, Jari Tiihonen, Tiina Tervala, Nina Mäyrä, Vili Ravanko, Hannu Paananen, Erkki Paatero
  • Sulphonated polymer resin and preparation thereof
    Patent number: 6664340
    Abstract: The invention relates to sulphonated polymer resins, particularly polymer resins with a sulphonated shell layer, and the preparation thereof. Resins according to the invention are prepared by sulphonating a polymer in a non-swollen state with substantially pure gaseous sulphur trioxide substantially in the shell layer of the polymer particles. The polymer to be sulphonated can be for example a styrene-DVB copolymer. The resins according to the invention can be used for example as chromatographic resins, ion-exchange resins and catalyst resins.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: December 16, 2003
    Assignee: Danisco Finland Oy
    Inventors: Ari Kärki, Erkki Paatero, Heikki Heikkilä, Heikki Mononen, Hannu Paananen, Jari Tiihonen