Patents by Inventor Christian Poetisch

Christian Poetisch 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).

  • Method of making highly uniform low-stress single crystals with reduced scattering
    Publication number: 20060201412
    Abstract: The method produces highly uniform, low-stress single crystals, especially of calcium fluoride. A single crystal drawn from a melt apparatus with a suitable process is cooled and subsequently subjected to a tempering step. The method is characterized by rapid cooling in a temperature range between less than or equal to 1300° C. and greater than or equal to 1050° C. with a cooling rate of greater than or equal to 10 K/h and preferably less than or equal to 60 K/h.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 14, 2006
    Inventors: Christian Poetisch, Gunther Wehrhahn, Lutz Parthier, Hans-Joerg Axmann, Joerg Staeblein