Patents by Inventor Stephan Michaelis

Stephan Michaelis 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: 12163031
    Abstract: The novel pigment preparations containing at least one metal azo pigment A) and at least one aliphatic monocarboxylic acid B) having 10 to 22 carbon atoms are suitable for the colouring of plastics and in this connection feature improved heat stability.
    Type: Grant
    Filed: October 5, 2021
    Date of Patent: December 10, 2024
    Assignee: LANXESS Deutschland GmbH
    Inventors: Stephan Michaelis, Sabine Endert, Frank Linke, Hans-Ulrich Borst
  • Publication number: 20220106487
    Abstract: The novel pigment preparations containing at least one metal azo pigment A) and at least one aliphatic monocarboxylic acid B) having 10 to 22 carbon atoms are suitable for the colouring of plastics and in this connection feature improved heat stability.
    Type: Application
    Filed: October 5, 2021
    Publication date: April 7, 2022
    Applicant: LANXESS Deutschland GmbH
    Inventors: Stephan Michaelis, Sabine Endert, Frank Linke, Hans-Ulrich Borst
  • Patent number: 10961396
    Abstract: The present invention relates to novel methine dyes, methods for the preparation thereof and use thereof for dyeing plastics, especially polyamides, so as to obtain yellow to orange colourings with improved light fastness and improved thermal stability.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: March 30, 2021
    Assignee: LANXESS Deutschland GmbH
    Inventors: Frank Linke, Stephan Michaelis, Hans-Ulrich Borst
  • Patent number: 10808129
    Abstract: The present invention relates to novel methine dyes, methods for the preparation thereof and use thereof for dyeing plastics, especially polyamides, so as to obtain yellow to orange colourings with improved light fastness and improved thermal stability. Methine dyes for example accord to the formula (I) in which R1 is hydrogen, halogen, alkyl, COOH or COOR9, R2 is oxygen or sulfur, R3 is hydrogen, halogen, COOH, COOR10 or CN, R4 is alkyl or phenyl, R5 and R6 are each independently alkyl, R7 and R8 are each independently hydrogen, halogen, alkyl or COOR11, and R9, R10 and R11 are each independently alkyl.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: October 20, 2020
    Assignee: LANXESS Deutschland GmbH
    Inventors: Hans-Ulrich Borst, Stephan Michaelis, Frank Linke
  • Patent number: 10487211
    Abstract: The present invention relates to novel methine dyes, methods for the preparation thereof and use thereof for dyeing plastics, especially polyamides, so as to obtain yellow to orange colourings with improved light fastness and improved thermal stability.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: November 26, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Hans-Ulrich Borst, Stephan Michaelis, Frank Linke
  • Patent number: 10435565
    Abstract: Novel red methine dyes, methods for the preparation thereof, and use thereof for dyeing plastics, especially vinyl polymers, provide red colourings with improved colour strengths and improved colour brilliance.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: October 8, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Hans-Ulrich Borst, Stephan Michaelis, Frank Linke
  • Patent number: 10266697
    Abstract: The present invention relates to novel methine dyes, methods for the preparation thereof and use thereof for dyeing plastics, especially polyamides, so as to obtain yellow colorings with improved light fastness and improved thermostability.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: April 23, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Hans-Ulrich Borst, Frank Linke, Stephan Michaelis
  • Patent number: 9663660
    Abstract: Yellow metal azo pigments based on adducts of at least two metal azo compounds provide improved dispersion properties and are of excellent suitability for pigmentation of pigment preparations for a broad field of use.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: May 30, 2017
    Assignee: LANXESS Deutschland GmbH
    Inventors: Stephan Michaelis, Frank Linke, Heinz-Josef Fuellman, Hans-Ulrich Borst, Sabine Endert, Dirk Pfuetzenreuter
  • Patent number: 8932786
    Abstract: The new metal azo pigments comprising the adduct of a) at least two metal azo compounds of the formula (I) or their tautomeric forms in which the substituents have the definition indicated in the description, and b) at least one compound of the formula (II) in which R6 has the definition indicated in the description, are characterized in that in the X-ray diffractogram with a lattice constant of d=10.3 (±0.2) ? the metal azo pigment has a signal S1 with an intensity I1 and in the lattice constant range from d=16.05 ? to d=11.78 ? has no signal S2 whose intensity I2 in relation to the intensity I1 of signal S1, expressed as ratio I2/I1 of the background-corrected intensities, exceeds a value of 0.02, and are outstandingly suitable for producing pigment preparations and especially for producing color filters.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: January 13, 2015
    Assignee: LANXESS Deutschland GmbH
    Inventors: Hans-Ulrich Borst, Frank Linke, Heinz-Josef Fuellmann, Stephan Michaelis, Dirk Pfuetzenreuter, Sabine Endert
  • Patent number: 8323357
    Abstract: The use of fluorine-substituted perylenes in color filters for liquid-crystal displays is described.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: December 4, 2012
    Assignee: LANXESS Deutschland GmbH
    Inventors: Ulrich Feldhues, Frank Linke, Stephan Michaelis, Dirk Pfuetzenreuter
  • Publication number: 20100264382
    Abstract: Use of fluorine-substituted perylenes in colour filters for liquid-crystal displays.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 21, 2010
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Ulrich Feldhues, Frank Linke, Stephan Michaelis, Dirk Pfuetzenreuter
  • Publication number: 20090076199
    Abstract: Mixtures have been found comprising at least one red dye of the formula (I), (C) or (CI) and at least one orange dye of the formula (L), (LI), (LII), (LIII), (LIV) or (LV) where the substituents have the definition in the description, these mixtures being suitable more particularly for the mass colouring of plastics.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Stephan Michaelis, Horst Berneth, Eberhard Kuckert
  • Patent number: 6852873
    Abstract: Process for preparing compounds of the formula (I) where R1, R2 and R3 are independently hydrogen, alkyl or cycloalkyl, characterized in that an aldehyde of the formula (II) is reacted with CH2(CN)2 in the presence of butanol.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: February 8, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef-Walter Stawitz, Stephan Michaelis, Christoph Thiebes
  • Patent number: 6846335
    Abstract: A novel crystal form of C.I. Solvent Orange 60 gives a higher space-time yield in dye synthesis and is more easily finished.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: January 25, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stephan Michaelis, Josef-Walter Stawitz
  • Patent number: 6600589
    Abstract: The invention relates to a light-protected electrochromic device containing a pair of glass or plastic sheets or plastic films. One side of at least one of said sheets or films, preferably both sheets or films, is provided with an electroconductive coating. At least one of said sheets or films and its electroconductive coating are transparent and the other can be metallized. The electroconductive coating of at least one of the two sheets or films can be divided up into separate, individually contacted surface segments. The sheets or films are joined by a sealing ring on the sides of their electroconductive coatings and the volume created by the sheets or films and the sealing ring is filled with an electrochromic medium. The invention is characterized in that the electrochromic device contains a yellow filter for which the wavelength at which absorbance in the long-wave flank reaches half of the very long-wave maximum absorbance value is between 370 and 500 nm, preferably between 380 and 470 nm.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: July 29, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Berneth, Stephan Michaelis, Ralf Neigl, Hermann Jens Womelsdorf
  • Publication number: 20030061670
    Abstract: Process for preparing compounds of the formula (I) 1
    Type: Application
    Filed: August 19, 2002
    Publication date: April 3, 2003
    Inventors: Josef-Walter Stawitz, Stephan Michaelis, Christoph Thiebes
  • Publication number: 20020193577
    Abstract: A novel crystal form of C.I. Solvent Orange 60 gives a higher space-time yield in dye synthesis and is more easily finished.
    Type: Application
    Filed: March 25, 2002
    Publication date: December 19, 2002
    Inventors: Stephan Michaelis, Josef-Walter Stawitz
  • Patent number: 6420576
    Abstract: The process for preparing arylaminohydroxyanthraquinone of the formula by reacting appropriate chlorohydroxyanthraquinone with an amine of the formula (III) H2N—Ar  (III), is characterized in that one mole of amine of the formula (III) plus an excess of 10 to 100% based on one mole of amine is used per chlorine atom in the compounds of the formula (II) and the reaction is carried out in an inert solvent in the presence of a base selected from the group consisting of the carbonates of the alkali and alkaline earth metals, the acetates of the alkali metals, the phosphates of the alkali metals and any mixtures thereof.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: July 16, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef-Walter Stawitz, Stephan Michaelis
  • Publication number: 20010020313
    Abstract: A process for bulk dyeing of plastics comprising the step of adding a dye of the formula (I) 1
    Type: Application
    Filed: February 20, 2001
    Publication date: September 13, 2001
    Inventors: Josef-Walter Stawitz, Stephan Michaelis
  • Patent number: 6121452
    Abstract: The present invention relates to a process for preparing compounds of formula (I) ##STR1## wherein A completes an unsubstituted or substituted heteroaromatic ring andB completes an unsubstituted or substituted aromatic ring, by reacting a heterocyclic compound of formula (II) ##STR2## wherein A completes an unsubstituted or substituted heteroaromatic ring, with an aromatic dicarboxylic acid of formula (III) ##STR3## or an anhydride thereof, wherein B completes an unsubstituted or substituted aromatic ring, in an organic solvent in the presence of an aliphatic or aromatic alcohol that is different from both the organic solvent and compounds (I), (II), and (III).
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: September 19, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Kalz, Stephan Michaelis, Karl-Heinz Reinhardt