Patents by Inventor Doreen Warthe
Doreen Warthe 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).
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Patent number: 9611390Abstract: The present invention relates to pigments which comprise a substrate and an iron(II) silicate-containing coating applied thereto, to a process for the preparation of these pigments, and to the use thereof.Type: GrantFiled: October 2, 2009Date of Patent: April 4, 2017Assignee: MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNGInventors: Johann Dietz, Doreen Warthe, Ute Honeit
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Patent number: 8337611Abstract: 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: GrantFiled: February 17, 2010Date of Patent: December 25, 2012Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Johann Dietz, Sabine Schoen, Doreen Warthe
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Publication number: 20110300200Abstract: 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: ApplicationFiled: August 15, 2011Publication date: December 8, 2011Inventors: Gerhard Pfaff, Johann Dietz, Cornelia Foerderer, Xenia Petsitis, Doreen Warthe, Veronika Hochstein
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Publication number: 20110196046Abstract: The present invention relates to pigments which comprise a substrate and an iron(II) silicate-containing coating applied thereto, to a process for the preparation of these pigments, and to the use thereof.Type: ApplicationFiled: October 2, 2009Publication date: August 11, 2011Applicant: MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNGInventors: Johann Dietz, Doreen Warthe, Ute Honeit
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Publication number: 20100151047Abstract: 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: ApplicationFiled: February 17, 2010Publication date: June 17, 2010Inventors: Gerhard PFAFF, Johann Dietz, Sabine Schoen, Doreen Warthe
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Patent number: 7691196Abstract: 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: GrantFiled: June 7, 2007Date of Patent: April 6, 2010Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Johann Dietz, Sabine Schoen, Doreen Warthe
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Publication number: 20090220557Abstract: 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: ApplicationFiled: November 7, 2006Publication date: September 3, 2009Inventors: Gerhard Pfaff, Johann Dietz, Cornelia Foerderer, Xenia Petsitis, Doreen Warthe, Veronika Hochstein
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Publication number: 20080047470Abstract: 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: ApplicationFiled: June 7, 2007Publication date: February 28, 2008Inventors: Gerhard Pfaff, Johann Dietz, Sabine Schoen, Doreen Warthe
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Patent number: 7255736Abstract: Effect pigments having improved optical properties based on SiO2 flakes coated with one or more layers, where the SiO2 flakes have a thickness of from 50 nm to 150 nm; processes for the preparation thereof; and use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity cards, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations; are disclosed.Type: GrantFiled: October 11, 2005Date of Patent: August 14, 2007Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Doreen Warthe, Johann Dietz, Cornelia Foerderer
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Patent number: 7169223Abstract: The present invention relates to effect pigments having a color flop comprising metal oxide-coated SiO2 flakes having a uniform layer thickness, where the color flop runs through all four quadrants of the a,b color coordinate system (CIELAB L,a,b system). The present invention likewise relates to processes for the preparation of these pigments in which SiO2 flakes having a uniform layer thickness are coated with metal oxides, and to the use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity papers, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations.Type: GrantFiled: January 17, 2006Date of Patent: January 30, 2007Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Cornelia Foerderer, Doreen Warthe, Johann Dietz
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Patent number: 7156913Abstract: The present invention relates to intensely colored red effect pigments comprising iron oxide-coated SiO2 flakes, where the total thickness of the effect pigments is not greater than 500 nm (+/?30 nm). The present invention likewise relates to processes for the preparation of these pigments in which SiO2 flakes are coated with iron oxide, where the thicknesses of the SiO2 flakes and of the iron-oxide layers are selected in such a way that the total thickness of the red effect pigments is not greater than 500 nm (+/?30 nm), and to the use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity papers, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations.Type: GrantFiled: January 13, 2006Date of Patent: January 2, 2007Assignee: Merck Patent GmbHInventors: Gerhard Pfaff, Cornelia Foerderer, Doreen Warthe, Johann Dietz
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Publication number: 20060156949Abstract: The present invention relates to intensely colored red effect pigments comprising iron oxide-coated SiO2 flakes, where the total thickness of the effect pigments is not greater than 500 nm (+/?30 nm). The present invention likewise relates to processes for the preparation of these pigments in which SiO2 flakes are coated with iron oxide, where the thicknesses of the SiO2 flakes and of the iron-oxide layers are selected in such a way that the total thickness of the red effect pigments is not greater than 500 nm (+/?30 nm), and to the use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity papers, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations.Type: ApplicationFiled: January 13, 2006Publication date: July 20, 2006Inventors: Gerhard Pfaff, Cornelia Foerderer, Doreen Warthe, Johann Dietz
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Publication number: 20060112859Abstract: Effect pigments having improved optical properties based on SiO2 flakes coated with one or more layers, where the SiO2 flakes have a thickness of from 50 nm to 150 nm; processes for the preparation thereof; and use of these pigments in cosmetics, paints, coatings, plastics, films, in security printing, in security features in documents and identity cards, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations; are disclosed.Type: ApplicationFiled: October 11, 2005Publication date: June 1, 2006Inventors: Gerhard Pfaff, Doreen Warthe, Johann Dietz, Cornelia Foerderer
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Publication number: 20060005742Abstract: The present invention relates to pearl essence-analogous pearlescent pigments prepared by enzymatic reaction of nucleosides and/or nucleotides, to processes for the preparation thereof, and to the use of the pearl essence-analogous pearlescent pigments.Type: ApplicationFiled: September 18, 2003Publication date: January 12, 2006Inventors: Gernot Moeschl, Doreen Warthe