Patents by Inventor Georg Schwalb

Georg Schwalb 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).

  • Invisible, machine-detectable security marking, production of the security marking, and security system comprising this security marking
    Patent number: 7401817
    Abstract: The invention relates to a security marking whose level of proof against forgery is greater than that of known security markings, comprising liquid-crystalline material with chiral phase, wherein the security marking is imperceptible to the eye and the properties of the liquid-crystalline material with chiral phase can be detected with the aid of detection systems.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: July 22, 2008
    Assignee: Sicpa Holding S.A.
    Inventors: Christoph Müller-Rees, Jürgen Küpfer, Horst Leigeber, Georg Schwalb
  • Invisible, machine-detectable security marking, production of the security marking, and security system comprising this security marking
    Publication number: 20030173539
    Abstract: The invention relates to a security marking whose level of proof against forgery is greater than that of known security markings, comprising liquid-crystalline material with chiral phase, wherein the security marking is imperceptible to the eye and the properties of the liquid-crystalline material with chiral phase can be detected with the aid of detection systems.
    Type: Application
    Filed: November 19, 2002
    Publication date: September 18, 2003
    Applicant: Consortium fuer elektrochemische Industrie GmbH
    Inventors: Christoph Muller-Rees, Jurgen Kupfer, Horst Leigeber, Georg Schwalb
  • Machine-detectable security marking with an increased level of proof against forgery, production of the security marking, and security system comprising this security marking
    Patent number: 6570648
    Abstract: The invention relates to a security marking whose level of proof against forgery is increased relative to known security markings, comprising liquid-crystalline material with chiral phase, wherein present within the security marking are at least two liquid-crystalline materials with chiral phase which differ in at least one property selected from the group consisting of handedness, color and color flop and which are arranged in the form of a structured or unstructured marking or a multilayer marking or in the form of liquid-crystalline pigments in a liquid-crystalline matrix, or wherein there is at least one liquid-crystalline material with chiral phase whose reflection band has been broadened by means of special techniques, or wherein there is at least one liquid-crystalline material with chiral phase which has a defined three-dimensional arrangement.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: May 27, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Christoph Müller-Rees, Jürgen Küpfer, Horst Leigeber, Georg Schwalb
  • Process for broadening cholesteric reflection bands of photopolymerizable cholesteric liquid crystals, and optical elements produced by this process
    Patent number: 6057008
    Abstract: Process for broadening cholesteric reflection bands of photopolymerizable cholesteric liquid crystals, and optical elements produced by this process. The invention relates to a process for broadening the cholesteric reflection bands of photopolymerizable cholesteric liquid crystals, which comprises the following process steps:1) partial polymerization of a layer containing photopolymerizable cholesteric liquid crystals by exposure to actinic light for a defined brief period at a defined temperature,2) observance of a defined waiting time without exposure (dark phase) at a defined temperature,3) fixing of the resultant layer by exposure to actinic light at a defined temperature.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: May 2, 2000
    Assignee: Consortium fur elekrochemische Industrie GmbH
    Inventors: Georg Schwalb, Mechthild Kopf, Franz-Heinrich Kreuzer