Patents by Inventor Gerhard Pfaff

Gerhard Pfaff 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).

  • Publication number: 20220251403
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings, printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.
    Type: Application
    Filed: April 21, 2022
    Publication date: August 11, 2022
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Noriyuki MATSUDA, Katsuhisa NITTA
  • Publication number: 20220243076
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings, printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.
    Type: Application
    Filed: April 14, 2022
    Publication date: August 4, 2022
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Noriyuki MATSUDA, Katsuhisa NITTA
  • Patent number: 11180659
    Abstract: A blended composition containing uncoated Al2O3 flakes having a thickness of ?500 nm and a D50-value of 15-30 ?m and a D90-value of 30-45 ?m, and/or coated Al2O3 flakes having a thickness of ?500 nm and a D50-value of 15-30 ?m and a D90-value of 30-45 ?m, which have been coated with at least one layer of a metal oxide, mixtures of at least two metal oxides, metal, metal sulphide, titanium suboxide, titanium oxynitride, FeO(OH), metal alloys and/or rare earth compounds, and their use in various formulations.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: November 23, 2021
    Assignee: Merck Patent GmbH
    Inventors: Ryuta Suzuki, Gerhard Pfaff, Sabine Schoen, Fumiko Sasaki, Satoru Kobayashi, Koshiro Kunii, Yuji Takenaka, Katsuhisa Nitta
  • Patent number: 11142649
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments. and organic dyes.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: October 12, 2021
    Assignee: Merck Patent GmbH
    Inventors: Ryuta Suzuki, Gerhard Pfaff, Sabine Schoen, Fumiko Sasaki, Satoru Kobayashi, Koshiro Kunii, Yuji Takenaka, Katsuhisa Nitta
  • Publication number: 20200339820
    Abstract: The present invention relates to effect pigments which are based on flake-form substrates having a circular form factor of 1.2-2 and are coated with at least one high-refractive-index layer, and to the use thereof, inter alia in paints, coatings, printing inks, plastics and in cosmetic formulations.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 29, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Gerhard PFAFF, Stephanie ANDES, Klaus AMBROSIUS, Ralf PETRY, Michael ROESLER, Sabine SCHOEN
  • Publication number: 20200231827
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings, printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.
    Type: Application
    Filed: April 8, 2020
    Publication date: July 23, 2020
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Noriyuki MATSUDA, Katsuhisa NITTA
  • Publication number: 20200231828
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings, printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.
    Type: Application
    Filed: April 8, 2020
    Publication date: July 23, 2020
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Noriyuki MATSUDA, Katsuhisa NITTA
  • Patent number: 10647861
    Abstract: Alpha-Alumina flakes having a particle thickness of 130-400 nm, a D50-value of 15-30 ?m, a D90-value of 30-45 ?m and a D10-value of <9.5 ?m. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: May 12, 2020
    Assignee: MERCK PATENT GMBH
    Inventors: Ryuta Suzuki, Gerhard Pfaff, Sabine Schoen, Noriyuki Matsuda, Katsuhisa Nitta
  • Publication number: 20190330475
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments. and organic dyes.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 31, 2019
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Fumiko SASAKI, Satoru KOBAYASHI, Koshiro KUNII, Yuji TAKENAKA, Katsuhisa NITTA
  • Patent number: 10457812
    Abstract: Alpha-Alumina flakes having a particle thickness of 550-1000 nm, a D50-value of 15-30 ?m, a D90-value of 30-45 ?m and a D10-value of ?9.0 ?m. Use of the alumina flakes in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations. Also, use of the alumina flakes as a substrate for effect pigments and in organic dyes.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: October 29, 2019
    Assignee: Merck Patent GmbH
    Inventors: Ryuta Suzuki, Gerhard Pfaff, Sabine Schoen, Fumiko Sasaki, Satoru Kobayashi, Koshiro Kunii, Yuji Takenaka, Katsuhisa Nitta
  • Publication number: 20190322871
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments. and organic dyes.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 24, 2019
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Fumiko SASAKI, Satoru KOBAYASHI, Koshiro KUNII, Yuji TAKENAKA, Katsuhisa NITTA
  • Patent number: 10280308
    Abstract: The present invention relates to silver-colored effect pigments having a strong sparkle effect based on Al2O3 flakes and to the use thereof in paints, button pastes, automotive paints, automotive refinish paints, powder coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, paper, for coating seed, in security applications, as dopant for the laser marking of plastics and papers, as additive for the laser welding of plastics, in cosmetic formulations and for the preparation of pigment preparations and dry preparations.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: May 7, 2019
    Assignee: MERCK PATENT GMBH
    Inventors: Johann Dietz, Cornelia Foerderer, Nicole Haferkorn, Gerhard Pfaff, Doreen McFarlane
  • Publication number: 20170130054
    Abstract: The present invention relates to silver-coloured effect pigments having a strong sparkle effect based on Al2O3 flakes and to the use thereof in paints, button pastes, automotive paints, automotive refinish paints, powder coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, paper, for coating seed, in security applications, as dopant for the laser marking of plastics and papers, as additive for the laser welding of plastics, in cosmetic formulations and for the preparation of pigment preparations and dry preparations.
    Type: Application
    Filed: March 11, 2015
    Publication date: May 11, 2017
    Applicant: MERCK PATENT GMBH
    Inventors: Johann DIETZ, Cornelia FOERDERER, Nicole HAFERKORN, Gerhard PFAFF, Doreen MCFARLANE
  • Publication number: 20160068683
    Abstract: The present invention relates to effect pigments which are based on flake-form substrates having a circular form factor of 1.2-2 and are coated with at least one high-refractive-index layer, and to the use thereof, inter alia in paints, coatings, printing inks, plastics and in cosmetic formulations.
    Type: Application
    Filed: September 8, 2015
    Publication date: March 10, 2016
    Inventors: Gerhard PFAFF, Stephanie ANDES, Klaus AMBROSIUS, Ralf PETRY, Michael ROESLER, Sabine SCHOEN
  • Patent number: 8906504
    Abstract: The present invention relates to pigments comprising a substrate and, applied thereto, an iron-containing coating comprising metallic iron, process for the preparation of the pigments according to the invention, and the use thereof.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: December 9, 2014
    Assignee: Merck Patent GmbH
    Inventors: Helge Bettina Kniess, Gerhard Pfaff
  • Publication number: 20140322534
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments. and organic dyes.
    Type: Application
    Filed: April 25, 2014
    Publication date: October 30, 2014
    Applicant: Merck Patent GmbH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Fumiko SASAKI, Satoru KOBAYASHI, Koshiro KUNII, Yuji TAKENAKA, Katsuhisa NITTA
  • Publication number: 20140322536
    Abstract: The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings, printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.
    Type: Application
    Filed: April 29, 2014
    Publication date: October 30, 2014
    Applicant: MERCK PATENT GMBH
    Inventors: Ryuta SUZUKI, Gerhard PFAFF, Sabine SCHOEN, Noriyuki MATSUDA, Katsuhisa NITTA
  • Patent number: 8337611
    Abstract: Disclosed are yellowing-stable, silver-white effect pigments having high whiteness based on synthetic mica flakes and to the use thereof in paints, lacquers, printing inks, plastics, button pastes, ceramic materials, glasses, for coloring seed, as dopant in laser markings of plastics and papers, as additive for laser welding of plastics, as additive for coloring in the foods and pharmaceuticals sectors and in cosmetic formulations, and for the preparation of pigment compositions and dry preparations.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: December 25, 2012
    Assignee: Merck Patent GmbH
    Inventors: Gerhard Pfaff, Johann Dietz, Sabine Schoen, Doreen Warthe
  • Publication number: 20110300200
    Abstract: The present invention relates to intensely coloured and light-stable effect pigments based on transparent, undoped SiO2 flakes, which are distinguished by the fact that they are covered with an iron-oxide layer having a thickness of 30-150 nm, and all SiO2 flakes have an identical thickness, and the thickness of the SiO2 flakes is 250-400 nm, and to the use thereof in pigment mixtures, in cosmetic formulations and for colouring foods and pharmaceutical products.
    Type: Application
    Filed: August 15, 2011
    Publication date: December 8, 2011
    Inventors: Gerhard Pfaff, Johann Dietz, Cornelia Foerderer, Xenia Petsitis, Doreen Warthe, Veronika Hochstein
  • Publication number: 20100151047
    Abstract: Disclosed are yellowing-stable, silver-white effect pigments having high whiteness based on synthetic mica flakes and to the use thereof in paints, lacquers, printing inks, plastics, button pastes, ceramic materials, glasses, for coloring seed, as dopant in laser markings of plastics and papers, as additive for laser welding of plastics, as additive for coloring in the foods and pharmaceuticals sectors and in cosmetic formulations, and for the preparation of pigment compositions and dry preparations.
    Type: Application
    Filed: February 17, 2010
    Publication date: June 17, 2010
    Inventors: Gerhard PFAFF, Johann Dietz, Sabine Schoen, Doreen Warthe