Patents by Inventor H{dot over (a)}kan Engqvist

H{dot over (a)}kan Engqvist 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: 8709149
    Abstract: Non-aqueous hydraulic cement compositions comprise a non-aqueous mixture of a powder composition and a non-aqueous water-miscible liquid. In one embodiment, powder composition is a Brushite or Monetite-forming calcium phosphate powder composition. In another embodiment, the powder composition comprises porous ?-tricalcium phosphate (?-TCP) granules and at least one additional calcium phosphate powder. In another embodiment, the powder composition comprises calcium silicate powder. In a further embodiment, the powder composition comprises calcium aluminate powder. In another embodiment, the powder composition is a cement composition and comprises nanopowders having a grain size of less than 1 micron. Hardened cements are formed from such hydraulic cement compositions, and methods of producing hardened cements, kits, and articles of manufacture employ such hydraulic cement compositions.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: April 29, 2014
    Assignee: Ossdsign AB
    Inventors: H{dot over (a)}kan Engqvist, Jonas Aberg
  • Patent number: 7351281
    Abstract: Powdered material, the binder phase of which mainly consists of a cement-based system, which powdered material has the capacity following saturation with a liquid reacting with the binder phase to hydrate to a chemically bonded ceramic material, preferably for dental purposes. According to the invention the powdered material has a composition and/or structure suitable for giving the ceramic material translucence in the hydrated state. The invention also relates to the ceramic material produced by hydration of the powdered material.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: April 1, 2008
    Assignee: Doxa Aktiebolag
    Inventors: Leif Hermansson, Lars Kraft, H{dot over (a)}kan Engqvist, Irmeli Hermansson, Nils-Otto Ahnfelt, Gunilla Gomez-Ortega