Patents by Inventor Detlef Lötzsch

Detlef Lötzsch 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).

  • ELECTRICALLY CONTROLLED INTERFERENCE COLOR FILTER AND THE USE THEREOF
    Publication number: 20170371224
    Abstract: The invention relates to an electrically controlled interference colour filter comprising at least two transparent electrodes, at least one nematic liquid crystal layer and alignment layers for alignment of the liquid crystals. When an electrical field is applied the liquid crystals can be realigned and thus the transmission wavelength range of the interference colour filter can be shifted.
    Type: Application
    Filed: December 13, 2015
    Publication date: December 28, 2017
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Arno SEEBOTH, Detlef LÖTZSCH, Christian RABE, Peter FRACH, Matthias GITTNER, Hagen BARTZSCH, René DE LA BARRÉ, Roland BARTMANN, Michael VERGÖHL, Stefan BRUNS, Thomas NEUBERT, Johanna FISCHER, Gerhard SCHOTTNER
  • Thermochromic material, molded article comprising said material and use thereof
    Patent number: 9193863
    Abstract: The invention relates to a thermochromic material comprising at least one biopolymer, at least one natural dye and at least one reaction medium, selected from the group of fatty acids and derivatives thereof, gallic acid and derivatives thereof and mixtures thereof. The thermochromic material according to the invention is completely based on non-toxic, natural products. Processing into materials or molded articles can occur, according to the invention, by means of conventional extrusion technology in the form of flat film, blown film or sheets or multi-wall sheets. The thermochromic material can be used in particular in the food industry and medical technology.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: November 24, 2015
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Detlef Lötzsch, Ralf Ruhmann, Arno Seeboth
  • THERMOCHROMIC MATERIAL, MOLDED ARTICLE COMPRISING SAID MATERIAL AND USE THEREOF
    Publication number: 20150247001
    Abstract: The invention relates to a thermochromic material comprising at least one biopolymer, at least one natural dye and at least one reaction medium, selected from the group of fatty acids and derivatives thereof, gallic acid and derivatives thereof and mixtures thereof. The thermochromic material according to the invention is completely based on non-toxic, natural products. Processing into materials or molded articles can occur, according to the invention, by means of conventional extrusion technology in the form of flat film, blown film or sheets or multi-wall sheets. The thermochromic material can be used in particular in the food industry and medical technology.
    Type: Application
    Filed: August 8, 2013
    Publication date: September 3, 2015
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Detlef Lötzsch, Ralf Ruhmann, Arno Seeboth