Patents by Inventor Nils-Otto Ahnfelt

Nils-Otto Ahnfelt 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).

  • System for a dental filling material or implant material, and powdered material, hydration liquid, implant material and method of achieving bonding
    Patent number: 7699925
    Abstract: A system for a dental filling material or an implant material, alternatively a system for bonding between a tooth or a bone and a dental filling material and a implant material, respectively, which system comprises a water based hydration liquid and a powdered material, the binder phase of which powdered material essentially consisting of a calcium based cement system, which powdered material has the capacity following saturation with the liquid reacting with the binder phase to hydrate to a chemically bonded ceramic material. According to the invention, said powdered material and/or said hydration liquid comprises water soluble phosphate or a phase that has the capacity to form water soluble phosphate, whereby the system exhibits the capacity during hydration to form apatite. The invention also relates to the powdered material and the hydration liquid as such, an implant material and a method of achieving bonding.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: April 20, 2010
    Assignee: Doxa AB
    Inventors: Håkan Engqvist, Leif Hermansson, Nils-Otto Ahnfelt, Jesper Loof, Lars Kraft, Jan-Erik Schulz-Walz
  • Powdered material and ceramic material manufactured therefrom
    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
  • System for a chemically bonded ceramic material, a powdered material and a hydration liquid therefore, the ceramic material, a method for its production and a device
    Publication number: 20060167148
    Abstract: A system for a chemically bonded ceramic material, comprising an aqueous hydration liquid and a powdered material, the binder phase of which essentially consisting of a cement system, which powdered material has the capacity following saturation with the hydration liquid reacting with the binder phase to hydrate to a chemically bonded ceramic material. According to the invention, the powdered material comprises a first part component for the formation of an organic phase in the ceramic material and the hydration liquid comprises a second part component for the formation of said organic phase. The invention also relates to the powdered material and the hydration liquid, respectively, the formed ceramic material, a method for the production of the material and a device for storing the powdered material and mixing it with the hydration liquid.
    Type: Application
    Filed: June 11, 2003
    Publication date: July 27, 2006
    Inventors: Hakan Engqvist, Leif Hermansson, Jesper Loof, Nils-Otto Ahnfelt
  • Powdered material and ceramic material manufactured therefrom
    Publication number: 20040206273
    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: Application
    Filed: March 25, 2004
    Publication date: October 21, 2004
    Inventors: Leif Hermansson, Lars Kraft, Hakan Engqvist, Irmeli Hermansson, Nils-Otto Ahnfelt, Gunilla Gomez-Ortega