Patents by Inventor Andreas Elschner

Andreas Elschner 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).

  • Patent number: 6075106
    Abstract: The present invention relates to (co)polymers which contain at least one repeat chain unit selected from the group comprising the general formula (1) and (2) and optionally (3), ##STR1## in which L.sup.1 and L.sup.2 mutually independently mean a photoluminescent residue.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: June 13, 2000
    Assignee: D-51368 Bayer AG
    Inventors: Yun Chen, Burkhard Kohler, Rolf Wehrmann, Andreas Elschner, Ralf Dujardin
  • Patent number: 5917279
    Abstract: The present invention relates to intermediate layers of inorganic materials in electroluminescent arrangements which contain finely divided inorganic particles (nano-particles) dispersed in a polymer binder.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: June 29, 1999
    Assignee: Bayer Aktiengesllschaft
    Inventors: Andreas Elschner, Rolf Wehrmann, Kai Butje
  • Patent number: 5905128
    Abstract: This invention relates to (co)polymers which contain at least one repeat chain unit of the general formula (1) or (2) and optionally repeat units of the general formula (3), ##STR1## in which L.sup.1 and L.sup.2 denote a photoluminescent residue,wherein the proportion of structural units of the formulae (1) and/or (2) is in each case 0.5 to 100 mol. % and of (3) is 0 to 99.5 mol. % and the molar percentages add up to 100,to the use thereof for the production of electroluminescent arrangements and to the electroluminescent arrangements.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: May 18, 1999
    Assignee: Bayer AG
    Inventors: Yun Chen, Rolf Wehrmann, Andreas Elschner, Ralf Dujardin
  • Patent number: 5891975
    Abstract: The present invention relates to (co)polymers which contain at least one repeat chain unit of the general formula (1) or (2) and optionally repeat units of the general formula (3), ##STR1## in which L.sup.1 and L.sup.2 mutually independently mean a photoluminescent residue, to a process for the production thereof, to the use thereof in electroluminescent devices and to the electroluminescent devices.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: April 6, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Yun Chen, Burkhard Kohler, Rolf Wehrmann, Andreas Elschner, Ralf Dujardin
  • Patent number: 5874180
    Abstract: The invention relates to electroluminescent arrangements (layers) containing special styrenes and to their use.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: February 23, 1999
    Assignee: Bayer AG
    Inventors: Rolf Wehrmann, Andreas Elschner, Siegfried Thurm, Hans Jurgen Rosenkranz, Ralf Dujardin
  • Patent number: 5807945
    Abstract: This invention relates to (co)polymers which contain at least one repeat chain unit of the general formula (1) or (2) and optionally repeat units of the general formula (3), ##STR1## in which L.sup.1 and L.sup.2 denote a photoluminescent residue,wherein the proportion of structural units of the formulae (1) and/or (2) is in each case 0.5 to 100 mol. % and of (3) is 0 to 99.5 mol. % and the molar percentages add up to 100,to the use thereof for the production of electroluminescent arrangements and to the electroluminescent arrangements.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: September 15, 1998
    Assignee: Bayer AG
    Inventors: Yun Chen, Rolf Wehrmann, Andreas Elschner, Ralf Dujardin
  • Patent number: 5766515
    Abstract: Mixtures ofA) neutral polythiophenes of formula (I), ##STR1## wherein R.sub.1 and R.sub.2 separately from one another represent hydrogen or a C.sub.1-4 alkyl group or together form an optionally substituted C.sub.1-4 alkylene radical, preferably a methylene radical optionally substituted by alkyl groups, an ethylene-1,2 radical optionally substituted by C.sub.1-12 alkyl or phenyl groups, or a cyclohexylene-1,2 radical, andB) organic compounds containing dihydroxy or polyhydroxy and/or carboxyl groups or amide groups or lactam groups,as well as transparent, electrically conducting coatings made therefrom and electroluminescent systems containing a conductive layer produced from the abovementioned mixtures as the electrode.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: June 16, 1998
    Assignee: Bayer Aktiengessellschaft
    Inventors: Friedrich Jonas, Alexander Karbach, Bavo Muys, Etienne van Thillo, Rolf Wehrmann, Andreas Elschner, Ralf Dujardin
  • Patent number: 5552226
    Abstract: In order to improve the adhesion of coatings, especially metal coatings, to the surfaces of plastic components, the latter are pretreated in low-pressure plasma with a process gas containing sulphur hexafluoride (SF.sub.6) which is substantially free of oxygen, the plastic surfaces being kept free of fluorine deposits or inclusions during the pretreatment.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 3, 1996
    Assignee: Bayer AG
    Inventors: Siegfried Thurm, Klaus Sommer, Peter Bier, Andreas Elschner, Manfred Kowitz, Axel Sandquist
  • Patent number: 5487810
    Abstract: In order to improve the adhesion of coatings, especially metal coatings, to the surfaces of plastic components, the latter are pretreated in low-pressure plasma with a process gas containing sulphur hexafluoride (SF.sub.6) which is substantially free of oxygen, the plastic surfaces being kept free of fluorine deposits or inclusions during the pretreatment.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: January 30, 1996
    Assignee: Bayer AG
    Inventors: Siegfried Thurm, Klaus Sommer, Peter Bier, Andreas Elschner, Manfred Kowitz, Axel Sandquist