Patents by Inventor Katsuhisa Nitta

Katsuhisa Nitta 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: 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
  • 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
  • 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
  • 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
  • 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: 20100045163
    Abstract: The invention relates to a phosphor element comprising Cr(III)-activated aluminium oxide (ruby), to the production thereof, and to the use thereof as LED conversion phosphor for white LEDs or so-called colour-on-demand applications.
    Type: Application
    Filed: October 25, 2007
    Publication date: February 25, 2010
    Inventors: Holger Winkler, Klaus Ambrosius, Thomas Juestel, Katsuhisa Nitta, Kaiman Shimizu
  • Publication number: 20080314284
    Abstract: [Problem] To provide highly anti-corrosive thin platelet-like metal pigments which have high corrosion resistance and good dispersibility even in a strong alkaline atmosphere thereby maintaining the inherent metallic luster of thin platelet-like metal substrates. [Solution] The highly anti-corrosive thin platelet-like metal pigments in which the surface of thin platelet-like metal substrates are treated with phosphoric acid compounds and/or boric acid compounds, and further coated with a layer containing hydrated tin oxide.
    Type: Application
    Filed: December 16, 2005
    Publication date: December 25, 2008
    Inventors: Bangyin Li, Nobuaki Nakamura, Katsuhisa Nitta, Norio Takahashi
  • Patent number: 7419538
    Abstract: Highly anti-corrosive thin-platelet like metal pigments having high corrosion resistance and good dispersibility characterized in that the inherent metallic luster of the thin-platelet like metal substrates is maintained without demanding the original surface smoothness are provided. The highly anti-corrosive thin-platelet like metal pigments comprising, on the surface of thin-platelet like metal substrates treated with phosphoric acid compounds and/or boric acid compounds, one or more coated layers containing one or more hydrated metal oxides of one or more metals selected from the group consisting of silicon, aluminum, zirconium, titanium and tin.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: September 2, 2008
    Assignee: Merck Patent GmbH
    Inventors: Bangyin Li, Nobuaki Nakamura, Katsuhisa Nitta
  • Patent number: 7384664
    Abstract: A positive-electrode active material for non-aqueous electrolyte secondary cells which combine improved discharge property and operational safety, and a process for preparing the same are provided. The positive-electrode active material comprises a base and one or more layers for coating the base, wherein at least one of the layers is a coating layer comprising one or more metallic components and one or more components selected from the group consisting of sulfur, selenium, and tellurium.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: June 10, 2008
    Assignee: Merck Patent GmbH
    Inventors: Ruediger Oesten, Ryuta Suzuki, Katsuhisa Nitta
  • Publication number: 20060047018
    Abstract: Disclosed are colored interference pigments having metallic luster that have, on the surface of a thin platelet-like metal substrate, a layer of an anti-corrosive treatment in a non-aqueous system, and, thereon (1) an intermediate binder layer that contains hydrated tin oxide (first layer); and, thereon, (2) a hydrated iron oxide layer (second layer),and a process for producing the same and their use. The pigments exhibit a reddish color and improved adhesion and denseness of the hydrated iron oxide layer.
    Type: Application
    Filed: January 7, 2005
    Publication date: March 2, 2006
    Inventors: Bangyin Li, Nobuaki Nakamura, Katsuhisa Nitta
  • Patent number: 6929690
    Abstract: A pigment with a metallic luster, comprising a wafer-like substrate made of aluminium dioxide having a thickness of more than 250 nm and less than 1 ?m, which is fully enveloped by a metal layer.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: August 16, 2005
    Assignee: Merck Patent GmbH
    Inventors: Reiner Vogt, Gerhard Pfaff, Stephanie Andes, Michael Uhlig, Martin Friz, Katsuhisa Nitta
  • Publication number: 20050153206
    Abstract: A positive-electrode active material for non-aqueous electrolyte secondary cells which combine improved discharge property and operational safety, and a process for preparing the same are provided. The positive-electrode active material comprises a base and one or more layers for coating the base, wherein at least one of the layers is a coating layer comprising one or more metallic components and one or more components selected from the group consisting of sulfur, selenium, and tellurium.
    Type: Application
    Filed: February 26, 2003
    Publication date: July 14, 2005
    Inventors: Ruediger Oesten, Ryuta Suzuki, Katsuhisa Nitta
  • Patent number: 6858072
    Abstract: This invention provides a highly orientated surface-modified pearl pigment excellent in plane orientation (leafing effect). Disclosed are: a surface-modified pearl pigment wherein fine polymer particles adhere, without being mutually aggregated, to hydrated metal oxides via chemical bonding; a process for producing the same: and use thereof for inks, coatings and plastics.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: February 22, 2005
    Assignee: Merck Patent GmbH
    Inventors: Bangyin Li, Katsuhisa Nitta