Patents by Inventor Hans-Jurgen Limburg

Hans-Jurgen Limburg 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).

  • Zinc sulfide electroluminophores and method for production thereof
    Patent number: 7252790
    Abstract: Zinc sulfide electroluminophores are prepared from solutions of zinc salts with hydrogen sulfide. The zinc sulfide compounds are mixed with activator and coactivator compounds to produce luminophores, and the mixtures are fired in the presence of fixing agents. These fired materials are then treated in an acid bath, washed, neutralized, and optionally filtered and dried.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: August 7, 2007
    Assignees: Leuchtstoffwerk Breitungen GmbH, Bundesdruckerei GmbH
    Inventors: Frank Kappe, Benedikt Ahlers, Arnim Franz-Burgholz, Hans-Jurgen Limburg, Detlef Starick, Monika Voh
  • Zinc sulfide electroluminophores and method for production thereof
    Publication number: 20060230980
    Abstract: Zinc sulfide electroluminophores are prepared from solutions of zinc salts with hydrogen sulfide. The zinc sulfide compounds are mixed with activator and coactivator compounds to produce luminophores, and the mixtures are fired in the presence of fixing agents. These fired materials are then treated in an acid bath, washed, neutralized, and optionally filtered and dried.
    Type: Application
    Filed: May 10, 2006
    Publication date: October 19, 2006
    Applicants: (1) LEUCHTSOFFWERK BREITUNGEN GMBH, (2) BUNDESDRUCKEREI GMBH
    Inventors: Frank Kappe, Benedikt Ahlers, Arnim Franz-Burgholz, Hans-Jurgen Limburg, Detlef Starick, Monika Voh
  • Zinc sulfide electroluminophores and method for production thereof
    Patent number: 7067071
    Abstract: Zinc sulfide electroluminophores are prepared from solutions of zinc salts with hydrogen sulfide. The zinc sulfide compounds are mixed with activator and coactivator compounds to produce luminophores, and the mixtures are fired in the presence of fixing agents. These fired materials are then treated in an acid bath, washed, neutralized, and optionally filtered and dried.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: June 27, 2006
    Assignees: Bundesdruckeri GmbH, Leuchtstoffwerk Breitungen GmbH
    Inventors: Frank Kappe, Benedikt Ahlers, Arnim Franz-Burgholz, Hans-Jürgen Limburg, Detlef Starick, Monika Voh