Patents by Inventor Cecilia Elgelid

Cecilia Elgelid 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).

  • Iron powder and method for the preparation thereof
    Patent number: 6562458
    Abstract: The invention concerns a process for the preparation of an insulated soft magnetic powder comprising the steps of mixing particles of a soft magnetic iron base powder with an acidic, aqueous insulating-layer forming solution, in which MgO has been dissolved; and drying the obtained mixture to obtain an electrically insulating Mg containing layer on the particle surfaces. The invention also concerns the powder per se as well as compressed soft magnetic powder cores prepared from the powder.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: May 13, 2003
    Assignee: Höganäs AB
    Inventors: Cecilia Elgelid, Anne Larsson-Westberg, Lars-Åke Larsson
  • Compressed soft magnetic materials
    Patent number: 6419877
    Abstract: The invention concerns a process for the preparation of a compressed soft magnetic powder core comprising the steps of compacting an iron based powder the particles of which are insulated by a chromium containing layer, at a pressure between 300 and 1500 Mpa. The compacted body is then heated to a temperature sufficient for achieving stress relief and recrystallization of the iron base material.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: July 16, 2002
    Assignee: Höganäs AB
    Inventors: Cecilia Elgelid, Anne Larsson-Westberg, Lars-Åke Larsson
  • Iron powder and method for the preparation thereof
    Publication number: 20010019771
    Abstract: The invention concerns a process for the preparation of an insulated soft magnetic powder comprising the steps of mixing particles of a soft magnetic iron base powder with an acidic, aqueous insulating-layer forming solution, in which MgO has been dissolved; and drying the obtained mixture to obtain an electrically insulating Mg containing layer on the particle surfaces. The invention also concerns the powder per se as well as compressed soft magnetic powder cores prepared from the powder.
    Type: Application
    Filed: January 16, 2001
    Publication date: September 6, 2001
    Inventors: Cecilia Elgelid, Anne Larsson-Westberg, Lars-Ake Larsson