Patents by Inventor G. P. Hellmann

G. P. Hellmann 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).

  • Moulded bodies consisting of core-shell particles
    Patent number: 7241502
    Abstract: The invention relates to mouldings having an optical effect which essentially consist of core/shell particles whose shell forms a matrix and whose core is essentially solid and has an essentially monodisperse size distribution, where a difference exists between the refractive indices of the core material and of the shell material. The mouldings are characterized in that they are obtainable by a process in which the core/shell particles are heated to a temperature at which the shell is flowable, and the flowable core/shell particles are subjected to the action of a mechanical force.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: July 10, 2007
    Assignee: Merck Patentgesellschaft
    Inventors: Ralf Anselmann, Holger Winkler, G. P. Hellmann, Tillmann Ruhl, Günther Vulpius, Harald Dörr
  • Moulded bodies consisting of core-shell particles
    Publication number: 20040253443
    Abstract: The invention relates to mouldings having an optical effect which essentially consist of core/shell particles whose shell forms a matrix and whose core is essentially solid and has an essentially monodisperse size distribution, where a difference exists between the refractive indices of the core material and of the shell material. The mouldings are characterised in that they are obtainable by a process in which the core/shell particles are heated to a temperature at which the shell is flowable, and the flowable core/shell particles are subjected to the action of a mechanical force.
    Type: Application
    Filed: March 12, 2004
    Publication date: December 16, 2004
    Inventors: Ralf Anselmann, Holger Winkler, G P Hellmann, Tilmann Ruhl, Gunther Vulpius, Harald Dorr