Patents by Inventor Pekka Vapaaoksa

Pekka Vapaaoksa 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: 6492551
    Abstract: A method for manufacturing alkali metal or alkaline-earth metal formate, starting from a formate anion comprises at least the following sequential steps: A) conversion of a solid anion exchanger to formate form by feeding into it a solution containing a formate anion, B) exchanging the formate anion in the anion exchanger for a replacing anion by feeding into it an alkali metal or alkaline-earth metal salt solution of this replacing anion, C) recovering the alkali metal or alkaline-earth metal formate solution eluted from the anion exchanger during the exchange of the formate anion. The anion exchanger is converted to formate form by feeding into it a sodium formate solution, a formic acid solution or a solution which contains both sodium formate and formic acid. The method can be used for production of potassium formate or calcium formate.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: December 10, 2002
    Assignee: Kemira Chemicals OY
    Inventors: Erkki Paatero, Marko Lahtinen, Kari Saari, Pekka Vapaaoksa
  • Patent number: 5776474
    Abstract: Skin or hair care product contains an agent acting cosmetically on the hair or skin, for example thioglycolic acid. The product is fibrous material, wherein the cosmetically acting material is absorbed, the absorbed material containing amino groups. A cellulose-based fiber containing polysilicic acid is used as the fibrous material, preferably viscose fiber, and the active agent is bound to the material through the polysilicic acid.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: July 7, 1998
    Assignee: Carefibres Oy
    Inventors: Maija Laurila, Pekka Vapaaoksa
  • Patent number: 5417752
    Abstract: A product contains silicon dioxide in the form of polysilicic acid in a supporting structure of cellulose. The polysilicic acid contains aluminum silicate sites. In the preparation of the product the cellulose and the silicon dioxide in the form of polysilicic acid are blended to obtain the product in solid form. The obtained blended product is modified with a compound containing aluminum, such as a solution aluminate, which causes the formation of aluminum silicate sites on the polysilicic acid. The cellulose used is viscose cellulose.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: May 23, 1995
    Assignee: Kemira Fibres Oy
    Inventors: Aarto Paren, Pekka Vapaaoksa