Patents by Inventor Masayasu Nonogaki

Masayasu Nonogaki 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: 10328722
    Abstract: An image forming method is provided. The method includes the steps of: applying a liquid composition, comprising a pigment, water, a resin, and an organic solvent, to a recording medium having water-absorptivity to form an image thereon; and winding up the recording medium in a roll form after the applying, wherein the following formulae are satisfied: 1.00×10?3?A?4.00×10?1 0.010?B/A?0.100 where B (mg/cm2) represents an amount of the organic solvent contained in the image after the winding and A (mg/cm2) represents a total amount of the organic solvent contained in the image and the recording medium after the winding.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: June 25, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Keita Katoh, Hiroshi Gotou, Masayasu Nonogaki, Kazuhiko Umemura, Masaki Kudo
  • Publication number: 20180339525
    Abstract: An image forming method is provided. The method includes the steps of: applying a liquid composition, comprising a pigment, water, a resin, and an organic solvent, to a recording medium having water-absorptivity to form an image thereon; and winding up the recording medium in a roll form after the applying, wherein the following formulae are satisfied: 1.00×10?3?A?4.00×10?1 0.010?B/A?0.100 where B (mg/cm2) represents an amount of the organic solvent contained in the image after the winding and A (mg/cm2) represents a total amount of the organic solvent contained in the image and the recording medium after the winding.
    Type: Application
    Filed: May 18, 2018
    Publication date: November 29, 2018
    Inventors: Keita KATOH, Hiroshi Gotou, Masayasu Nonogaki, Kazuhiko Umemura, Masaki Kudo
  • Patent number: 9752037
    Abstract: An inkjet recording ink, including: water; a water-soluble organic solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer contains a structural unit represented by the following General Formula (1) and a structural unit represented by the following General Formula (2): where R1 denotes a hydrogen atom or a methyl group; M+ denotes an alkali metal ion, an organic amine ion, or a hydrogen ion; half or more of M+ in the copolymer is the alkali metal ion or the organic amine ion, the remainder of M+ is the hydrogen ion; n and m each denote an integer of 0 to 6, provided that both of n and m are not 0; and a block of (C2H4O) and a block of (C3H6O) may be exchanged with each other, where R2 denotes a hydrogen atom or a methyl group.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: September 5, 2017
    Assignees: Ricoh Company, Ltd., GOO CHEMICAL CO., LTD.
    Inventors: Minoru Hakiri, Mitsuru Naruse, Masayasu Nonogaki, Keita Katoh, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka, Masato Matsumura, Takuya Furuta
  • Patent number: 9688871
    Abstract: An inkjet recording ink, including: water; a water-soluble solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer includes a structural unit represented by the following general formula (1) and a structural unit represented by the following general formula (2): wherein, in the general formula (1), R1 represents either of a hydrogen atom and a methyl group; and M+ represents any of an alkali metal ion, an organic amine ion and a hydrogen ion, one-half or more of the M+ in the copolymer is an alkali metal ion or an organic amine, and the remainder is a hydrogen ion; wherein, in the general formula (2), R2 represents either of a hydrogen atom and a methyl group.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: June 27, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masayasu Nonogaki, Keita Katoh, Minoru Hakiri, Mitsuru Naruse, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka, Nobuyuki Sakamoto, Yosuke Matsuoka, Masatomo Takahashi
  • Patent number: 9617439
    Abstract: An ink composition contains (a) a pigment represented by chemical formula 1a or chemical formula 1b, (b) a polymer having a structure unit having a diphosphonic acid group and represented by Chemical formula 2, (c) a hydrosoluble solvent, and (d) water.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: April 11, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akihiko Matsuyama, Shigeyuki Harada, Keita Katoh, Masayuki Fukuoka, Mitsuru Naruse, Kazukiyo Nagai, Yuusuke Koizuka, Masayasu Nonogaki
  • Patent number: 9597891
    Abstract: An inkjet ink contains water, a hydrosoluble organic solvent, a pigment, polyvinyl pyrolidone, and a copolymer, wherein the copolymer contains a structure unit represented by Chemical formula 1, where R1 represents a hydrogen atom or a methyl group, R2 is an alkyl group having one to four carbon atoms, M1+, M2+, M3+, and M4+ each, independently represent protons, alkali metal ions, or organic ammonium ions, and a structure unit represented by Chemical formula 2, where R3 represents a hydrogen atom or a methyl group, a structure unit represented by Chemical formula 3, where R4 represents a hydrogen atom or a methyl group, or a structure unit represented by Chemical formula 4, where R5 represents a hydrogen atom or a methyl group.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: March 21, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayasu Nonogaki, Mitsuru Naruse, Akihiko Matsuyama, Keita Katoh, Kazukiyo Nagai, Yuusuke Koizuka
  • Patent number: 9598589
    Abstract: An inkjet ink is provided. The inkjet ink includes water; a penetrant, a pigment, and a polymer compound. The polymer compound includes a unit (A) including a functional group having the below-mentioned formula (1) or (2), and another unit (B) including a carboxyl group. The unit (A) is included in the polymer compound in an amount of from 30% to 90% by weight based on the total weight of the polymer compound.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: March 21, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Mitsuru Naruse, Minoru Hakiri, Masayasu Nonogaki
  • Patent number: 9441129
    Abstract: An ink for inkjet recording contains water, an organic solvent, a pigment, and a compound represented by the following Chemical formula 1: In Chemical formula 1, M+'s each, independently represent protons, cations of alkali metals, ammonium ions, or organic ammonium ions.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: September 13, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keita Katoh, Mitsuru Naruse, Masayasu Nonogaki, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka
  • Patent number: 9359522
    Abstract: An ink composition contains a pigment; a copolymer containing a phosphoric acid group or phosphonic acid group; a hydrosoluble solvent; and water, wherein the pigment is represented by the following chemical formula 1 and satisfies the following relation 1: Y<X<0.8, where X represents a peak intensity at a Bragg (2?±0.2°) angle in a range of 2? of from 5.5° to 6.0° and Y represents a peak intensity at a Bragg (2?±0.2°) angle in a range of 2? of from 26.5° to 27.5° to a CuK? X-ray having a wavelength of 1.541 ?. where R each, independently represents monovalent groups selected from hydrogen atoms, methyl groups, or chlorine atoms.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: June 7, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akihiko Matsuyama, Mitsuru Naruse, Masayasu Nonogaki, Keita Katoh, Kazukiyo Nagai, Yuusuke Koizuka
  • Patent number: 9321926
    Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent; a pigment; and a copolymer including a phosphonic acid group. The copolymer including a phosphonic acid group includes structural units having the following formulae (1) and (2): wherein R1 represents a hydrogen atom or a methyl group; and M represents a hydrogen atom, an alkali metal or an organic ammonium; and wherein R2 represents a hydrogen atom or a methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; and each of n and m represents 0 or an integer of from 1 to 30, provided n+m is from 2 to 30.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: April 26, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Keita Katoh, Shigeyuki Harada, Masayuki Fukuoka, Mitsuru Naruse, Masayasu Nonogaki, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka
  • Patent number: 9309427
    Abstract: An ink composition contains a pigment; a copolymer comprising a phosphoric acid group or phosphonic acid group; a hydrosoluble solvent; and water, wherein the pigment is represented by the following chemical formula 1 and satisfies the following relation 1: Y/X?0.20??Relation 1 where X represents a peak intensity at a Bragg (2?±0.2°) angle in a range of 2? of from 26.5° to 27.5° and Y represents a peak intensity at a Bragg (2?±0.2°) angle in a range of 2? of from 11.0° to 11.5° to a CuK? X-ray having a wavelength of 1.541 ?.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: April 12, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Mitsuru Naruse, Masayasu Nonogaki, Kazukiyo Nagai, Keita Katoh, Yuusuke Koizuka
  • Patent number: 9267046
    Abstract: Inkjet ink contains a pigment, a hydrosoluble solvent, and water, wherein the pigment is represented by the following chemical formula 1 and has a CuK? X-ray diffraction spectrum having a wavelength of 1.541 ? such that no main peak is observed at a Bragg (2?±0.2°) angle in a range of 2? of from 28.0° to 29.0°, wherein R represents a hydrogen atom, a methyl group, or a chlorine atom.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: February 23, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Mitsuru Naruse, Masayasu Nonogaki, Minoru Hakiri, Keita Katoh
  • Patent number: 9234110
    Abstract: An ink for inkjet recording, which is used for recording on a paper having a concentration of an eluted Ca ion of from 1.0×10?4 to 5.0×10?4 g/g when dipped in pure water. The ink includes at least a pigment, a pigment dispersant, a water-soluble organic solvent and water. The pigment dispersant is a copolymer synthesized using at least (1) unsaturated ethylene monomer having a phosphoric acid group or a phosphonic acid group and (2) unsaturated ethylene monomer having an alkyl group having 12 to 22 carbon atoms.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: January 12, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keita Katoh, Mitsuru Naruse, Akihiko Matsuyama, Masayasu Nonogaki, Minoru Hakiri, Kazukiyo Nagai, Yuusuke Koizuka
  • Publication number: 20150376425
    Abstract: An inkjet recording ink, including: water; a water-soluble organic solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer contains a structural unit represented by the following General Formula (1) and a structural unit represented by the following General Formula (2): where R1 denotes a hydrogen atom or a methyl group; M+ denotes an alkali metal ion, an organic amine ion, or a hydrogen ion; half or more of M+ in the copolymer is the alkali metal ion or the organic amine ion, the remainder of M+ is the hydrogen ion; n and m each denote an integer of 0 to 6, provided that both of n and m are not 0; and a block of (C2H4O) and a block of (C3H6O) may be exchanged with each other, where R2 denotes a hydrogen atom or a methyl group.
    Type: Application
    Filed: February 27, 2014
    Publication date: December 31, 2015
    Inventors: Minoru HAKIRI, Mitsuru NARUSE, Masayasu NONOGAKI, Keita KATOH, Akihiko MATSUYAMA, Kazukiyo NAGAI, Yuusuke KOIZUKA, Masato MATSUMURA, Takuya FURUTA
  • Patent number: 9217089
    Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent, a pigment, and a copolymer including a salt of a diphosphonic acid group. The copolymer including a salt of a diphosphonic acid group includes structural units having the following formulae (1) and (2): X represents an alkylene group having 1 to 3 carbon atoms, each of R1 and R2 represents a hydrogen atom or a methyl group, M+ represents an alkali metal ion, an organic ammonium ion or a proton and Z1 represents a hydrocarbon group having 6 to 22 carbon atoms. The alkali metal ion or the organic ammonium ion and the proton may be mixed, and half or more of the M+ are alkali metal ions or the organic ammonium ions.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: December 22, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazukiyo Nagai, Yuusuke Koizuka, Mitsuru Naruse, Masayasu Nonogaki, Akihiko Matsuyama, Keita Katoh, Shigeyuki Harada, Masayuki Fukuoka
  • Patent number: 9217091
    Abstract: An inkjet recording ink, including: water; a water-soluble solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer includes a structural unit represented by the following general formula (1) and a structural unit represented by the following structural formula (1): wherein, in the general formula (1), R1 represents either of a hydrogen atom and a methyl group; and M+ represents any of an alkali metal ion, an organic ammonium ion, an organic amine ion and a hydrogen ion, one-half or more of the M+ in the copolymer is an alkali metal ion, an organic ammonium ion or an organic amine, and the remainder is a hydrogen ion:
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: December 22, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keita Katoh, Mitsuru Naruse, Akihiko Matsuyama, Masayasu Nonogaki, Minoru Hakiri, Yuusuke Koizuka, Kazukiyo Nagai, Nobuyuki Sakamoto, Yosuke Matsuoka, Masatomo Takahashi
  • Patent number: 9200169
    Abstract: An inkjet recording ink, including: water; a wetting agent; a colorant; and polymer microparticles, wherein the polymer microparticles are each a copolymer of a monomer represented by the following structural formula (1) or the following general formula (2), a monomer represented by the following general formula (3), and a macromonomer represented by the following general formula (4): where “R1” is an alkyl group having 1 to 4 carbon atoms, where “Rs” are independently an alkyl group having 1 to 4 carbon atoms, where “l” is the number of repeating units, and an integer of 1 to 100.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 1, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayasu Nonogaki, Mitsuru Naruse, Minoru Hakiri, Keita Katoh
  • Publication number: 20150307734
    Abstract: An inkjet ink contains water, a hydrosoluble organic solvent, a pigment, polyvinyl pyrolidone, and a copolymer, wherein the copolymer contains a structure unit represented by Chemical formula 1, where R1 represents a hydrogen atom or a methyl group, R2 is an alkyl group having one to four carbon atoms, M1+, M2+, M3+, and M4+ each, independently represent protons, alkali metal ions, or organic ammonium ions, and a structure unit represented by Chemical formula 2, where R3 represents a hydrogen atom or a methyl group, a structure unit represented by Chemical formula 3, where R4 represents a hydrogen atom or a methyl group, or a structure unit represented by Chemical formula 4, where R5 represents a hydrogen atom or a methyl group.
    Type: Application
    Filed: March 31, 2015
    Publication date: October 29, 2015
    Inventors: Masayasu NONOGAKI, Mitsuru Naruse, Akihiko Matsuyama, Keita Katoh, Kazukiyo Nagai, Yuusuke Koizuka
  • Publication number: 20150291817
    Abstract: An ink for inkjet recording includes water; a hydrosoluble solvent; a pigment; and a copolymer including a phosphonic acid group. The copolymer including a phosphonic acid group includes structural units having the following formulae (1) and (2): wherein R1 represents a hydrogen atom or a methyl group; and M represents a hydrogen atom, an alkali metal or an organic ammonium; and wherein R2 represents a hydrogen atom or a methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; and each of n and m represents 0 or an integer of from 1 to 30, provided n+m is from 2 to 30.
    Type: Application
    Filed: April 1, 2015
    Publication date: October 15, 2015
    Inventors: Keita KATOH, Shigeyuki HARADA, Masayuki FUKUOKA, Mitsuru NARUSE, Masayasu NONOGAKI, Akihiko MATSUYAMA, Kazukiyo NAGAI, Yuusuke KOIZUKA
  • Patent number: 9150745
    Abstract: Inkjet ink contains a pigment, a hydrosoluble solvent, and water, wherein the pigment is represented by the following chemical formula 1 and has a CuK? X-ray diffraction spectrum having a wavelength of 1.541 ? such that no main peak is observed at a Bragg (2?±0.2°) angle in a range of 2? of from 28.0° to 29.0°, wherein R represents a hydrogen atom, a methyl group, or a chlorine atom.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: October 6, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Matsuyama, Mitsuru Naruse, Masayasu Nonogaki, Minoru Hakiri, Keita Katoh