Patents by Inventor Johanna Niinimäki

Johanna Niinimäki 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 producing microcrystalline titanium oxide
    Patent number: 8268203
    Abstract: A method for producing microcrystalline titanium dioxide in the rutile form having a crystal size below 15 nm by an aqueous method, and a titanium dioxide product doped with silicon obtained by the method. The method generally includes adding a silicon containing compound during crystal formation to provide said titanium dioxide product with a small crystal size.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 18, 2012
    Assignee: Sachtleben Pigments Oy
    Inventors: Ralf-Johan Lamminmäki, Johanna Niinimäki
  • Method of preparing a well-dispersable microcrystalline titanium dioxide product, the product, and the use thereof
    Patent number: 8182602
    Abstract: The invention relates to a method of preparing a well-dispersable, rutile-structured, microcrystalline titanium dioxide product, a product prepared by the method, and an effect paint and a lacquer provided by means of the product. In the method, the titanium dioxide starting material is first treated with a base to have an alkaline pH value, after which it is treated with an acid to have a hydrochloric acid content of 8 to 30 g/l, neutralized, processed, and calcinated. In particular, the preparation method is characterized by the use of a pretreatment chemical before the calcination stage to improve the dispersability.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: May 22, 2012
    Assignee: Sachtleben Pigments Oy
    Inventors: Ralf-Johan Lamminmäki, Esa Latva-Nirva, Riitta Linho, Johanna Niinimäki, Visa Vehmanen
  • METHOD OF PREPARING A WELL-DISPERSABLE MICROCRYSTALLINE TITANIUM DIOXIDE PRODUCT, THE PRODUCT, AND THE USE THEREOF
    Publication number: 20110192322
    Abstract: The invention relates to a method of preparing a well-dispersable, rutile-structured, microcrystalline titanium dioxide product, a product prepared by the method, and an effect paint and a lacquer provided by means of the product. In the method, the titanium dioxide starting material is first treated with a base to have an alkaline pH value, after which it is treated with an acid to have a hydrochloric acid content of 8 to 30 g/l, neutralized, processed, and calcinated. In particular, the preparation method is characterized by the use of a pretreatment chemical before the calcination stage to improve the dispersability.
    Type: Application
    Filed: August 15, 2008
    Publication date: August 11, 2011
    Inventors: Ralf-Johan Lamminmäki, Esa Latva-Nirva, Riitta Linho, Johanna Niinimäki, Visa Vehmanen
  • METHOD FOR PRODUCING MICROCRYSTALLINE TITANIUM OXIDE
    Publication number: 20110180769
    Abstract: A method for producing microcrystalline titanium dioxide in the rutile form having a crystal size below 15 nm by an aqueous method, and a titanium dioxide product doped with silicon obtained by the method. The method generally includes adding a silicon containing compound during crystal formation to provide said titanium dioxide product with a small crystal size.
    Type: Application
    Filed: June 30, 2009
    Publication date: July 28, 2011
    Applicant: SACHTLEBEN PIGMENTS OY
    Inventors: Ralf-Johan Lamminmäki, Johanna Niinimäki