Patents by Inventor Eckhard Hanelt

Eckhard Hanelt 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).

  • Mixture comprising pigments having a liquid-crystalline structure with a chiral phase and its use
    Patent number: 6224664
    Abstract: The invention relates to mixtures containing pigments which comprise oriented three-dimensionally crosslinked substances having a liquid-crystalline structure with a chiral phase, and to the use of such mixtures. Pigment and matrix are matched to one another in such a way that on application of the mixture at different temperatures to a substrate, the lowest application temperature and highest application temperature differing by at least 10° C. and by not more than 150° C., there are no visually perceptible color differences of the pigmented paint on the substrate after drying.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: May 1, 2001
    Assignee: Wacker-Chemie GmbH
    Inventors: Christoph Müller-Rees, Eckhard Hanelt, Franz-Heinrich Kreuzer, Jürgen Küpfer, Horst Leigeber
  • Process for the production of three-dimensionally crosslinked polymeric materials having broad cholesteric reflection bands, and filters, reflectors and polarizers produced by this process
    Patent number: 6071438
    Abstract: The invention relates to a process for the preparation of three-dimensionally crosslinked polymeric materials having a broad cholesteric reflection band, which comprises bringing polymeric materials having cholesteric properties and an extractable material content into contact with a solvent or solvent mixture.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: June 6, 2000
    Assignee: Consortium fur elektrochemische Industrie GmbH
    Inventors: Horst Leigeber, Eckhard Hanelt, Franz-Heinrich Kreuzer
  • Liquid-crystal mixtures, process for their preparation and their use
    Patent number: 5827449
    Abstract: Liquid-crystalline materials having a cholesteric phase with a pitch of less than 400 nm, comprising a) liquid-crystalline organosiloxanes containing dianhydrohexitol derivatives as chiral groups, and b) chiral monomeric additives which induce the same helicality as the respective liquid-crystalline organo-siloxanes.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: October 27, 1998
    Assignee: Consortium fur elektrochemische Industrie GmbH
    Inventors: Eckhard Hanelt, Christian Schierlinger, Franz-Heinrich Kreuzer