Patents by Inventor Shigeru Kusakata

Shigeru Kusakata 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: 8680175
    Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1; Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 25, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeo Hatada, Keishi Taniguchi, Shigeru Kusakata, Ichiroh Fujii, Akihiko Matsuyama, Yuuki Yokohama
  • Publication number: 20130023614
    Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1; Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 24, 2013
    Inventors: Shigeo HATADA, Keishi TANIGUCHI, Shigeru KUSAKATA, Ichiroh FUJII, Akihiko MATSUYAMA, Yuuki YOKOHAMA
  • Patent number: 8317913
    Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1: Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: November 27, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeo Hatada, Keishi Taniguchi, Shigeru Kusakata, Ichiroh Fujii, Akihiko Matsuyama, Yuuki Yokohama
  • Publication number: 20090047431
    Abstract: The present invention provides an inkjet ink containing at least a colorant, water, a water insoluble resin, a fluorine surfactant, and a polyether-modified silicone oil, wherein the polyether-modified silicone oil has a hydrophobic value of 0.40 to 1.5, and the hydrophobic value is expressed by Equation 1: Hydrophobic value=A/B??Equation 1 where “A” represents an integration value of a peak area from 0 ppm to 0.3 ppm in a 1H-NMR spectrum of the polyether-modified silicone oil using tetramethylsilane as a reference substance; and “B” represents an integration value of a peak area from 3.5 ppm to 4.0 ppm in the 1H-NMR spectrum.
    Type: Application
    Filed: August 13, 2008
    Publication date: February 19, 2009
    Inventors: Shigeo HATADA, Keishi Taniguchi, Shigeru Kusakata, Ichiroh Fujii, Akihiko Matsuyama, Yuuki Yokohama
  • Patent number: 7378458
    Abstract: The invention provides a method for preparing an ink having constituents of a water-soluble dye having a water-soluble solubilizing group of at least one of a sulfonic group and a carboxyl group, water, a water-soluble substance that is condensation-polymerized in the absence of the water, a water-soluble medium and an additive including at least one of an organic acid salt and an inorganic acid salt. This method includes a first mixing step of mixing at least the dye and the water-soluble substance out of the constituents of the ink excluding the additive; a second mixing step of mixing a mixture obtained in the first mixing step and the additive; and a pH adjusting step, performed before the second mixing step, of preparing a solution including the mixture or a solution including the additive while adjusting the solution to a given pH range by using a pH adjuster.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: May 27, 2008
    Assignees: Matsushita Electric Industrial Co., Ltd., Ricoh Company, Ltd.
    Inventors: Hidekazu Arase, Mamoru Soga, Masaichiro Tatekawa, Shigeru Kusakata, Tsutomu Matsuda, Masashi Itoh
  • Patent number: 7368007
    Abstract: An ink-jet recording ink contains at least a colorant, a moisturizer, water and a water-soluble substance capable of undergoing polycondensation along with vaporization of the water, in which the colorant is a chelate azo dye.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: May 6, 2008
    Assignees: Ricoh Company, Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeru Kusakata, Tsutomu Matsuda, Masashi Itoh, Mamoru Soga, Hidekazu Arase, Masaichiro Tatekawa
  • Publication number: 20050005817
    Abstract: An ink-jet recording ink contains at least a colorant, a moisturizer, water and a water-soluble substance capable of undergoing polycondensation along with vaporization of the water, in which the colorant is a chelate azo dye.
    Type: Application
    Filed: May 28, 2004
    Publication date: January 13, 2005
    Inventors: Shigeru Kusakata, Tsutomu Matsuda, Masashi Itoh, Mamoru Soga, Hidekazu Arase, Masaichiro Tatekawa
  • Publication number: 20040198867
    Abstract: The invention provides a method for preparing an ink having constituents of a water-soluble dye having a water-soluble solubilizing group of at least one of a sulfonic group and a carboxyl group, water, a water-soluble substance that is condensation-polymerized in the absence of the water, a water-soluble medium and an additive including at least one of an organic acid salt and an inorganic acid salt. This method includes a first mixing step of mixing at least the dye and the water-soluble substance out of the constituents of the ink excluding the additive; a second mixing step of mixing a mixture obtained in the first mixing step and the additive; and a pH adjusting step, performed before the second mixing step, of preparing a solution including the mixture or a solution including the additive while adjusting the solution to a given pH range by using a pH adjuster.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 7, 2004
    Inventors: Hidekazu Arase, Mamoru Soga, Masaichiro Tatekawa, Shigeru Kusakata, Tsutomu Matsuda, Masashi Itoh
  • Patent number: 5691099
    Abstract: The object of the present invention is to provide a novel and useful thermal developing type diazo copying material wherein an initial image quality and an initial image reliability are maintained, while undesired coloring can be avoided and long-term preservation characteristics can be improved. The present invention comprises a support, a photosensitive layer formed on said support, said photosensitive layer including a diazo compound, and a coupler layer formed on said support, said coupler layer including a coupler component, said coupler layer having a copolymer including a monomer having a carboxylic acid and water-soluble guanidine salt.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: November 25, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeru Kusakata, Masanori Rimoto, Kazuo Matsuda, Naohito Shimota
  • Patent number: 5556733
    Abstract: A thermal development diazo copying material is composed of a support, a diazo layer which contains a diazo compound, and a coupler layer which contains a coupling component, an alkali-soluble resin and a thermofusible material, which are overlaid on the support.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: September 17, 1996
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeru Kusakata, Masanori Rimoto
  • Patent number: 5478689
    Abstract: A thermal development diazo copying material is composed of a support, and a photosensitive layer formed thereon, which includes a diazo compound, a coupler, an alkali-soluble resin, and a sensitizer, with only the coupler being contained in microcapsules made of the alkali-soluble resin.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: December 26, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Masanori Rimoto, Shigeru Kusakata
  • Patent number: 5084593
    Abstract: Leuco dyes of the formula (I) are disclosed, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent an alkyl group having 1 to 10 carbon atoms; X represents hydrogen, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or a halogen; and Y represents R.sub.5 --Z--SO.sub.2 NH--, R.sub.6 --Z--CONH--, or ##STR2## in which Z represents ##STR3## R.sub.5 and R.sub.6 each represent hydrogen, an alkyl group having 1 to 10 carbon atoms, or a halogen; and R.sub.7 and R.sub.8 each represent hydrogen, a cyano group, or --COR.sub.9, in which R.sub.9 represents a lower alkyl group, a lower alkoxyl group, a phenyl group which may be substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, or a halogen; a naphthyl group which may be substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a halogen with the proviso that R.sub.7 and R.sub.8 are not both hydrogen.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: January 28, 1992
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotoh, Shigeru Kusakata, Isao Shiojima
  • Patent number: 5057154
    Abstract: A leuco dye of the formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 each represent a lower alkyl group; A represents ##STR2## in which R.sup.9 and R.sup.10 each represent hydrogen, provided that both R.sup.9 and R.sup.10 may not be hydrogen, --CN or --COR.sup.14 in which R.sup.14 represents a phenyl group which is unsubstituted or is substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, or a halogen, a naphthyl group which is unsubstituted or is substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a halogen, or a lower alkoxyl group, ##STR3## in which ##STR4## represents a phenyl group or a naphthyl group, R.sup.11 represents hydrogen, a lower alkyl group, a halogen, an amino group, which is unsubstituted or is substituted by an alkyl group having 1 to 4 carbon atoms, or a nitro group, or ##STR5## in which R.sup.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: October 15, 1991
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeru Kusakata, Hiroshi Gotoh, Isao Shiojima
  • Patent number: 5008238
    Abstract: Leuco dyes of the formula (I) are disclosed, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent an alkyl group having 1 to 10 carbon atoms; X represents hydrogen, an alkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms or a halogen; and Y represents R.sub.5 --Z--SO.sub.2 NH--, R.sub.6 --Z--CONH--, or ##STR2## in which Z represents ##STR3## R.sub.5 and R.sub.6 each represent hydrogen, an alkyl group having 1 to 10 carbon atoms, or a halogen; and R.sub.7 and R.sub.8 each represent hydrogen, provided that both R.sub.7 and R.sub.8 may not be hydrogen, a cyano group, or --COR.sub.9, in which R.sub.9 represents a lower alkyl group, a lower alkoxyl group, a phenyl group which may be substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, or a halogen; a naphthyl group which may be substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a halogen.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: April 16, 1991
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotoh, Shigeru Kusakata, Isao Shiojima
  • Patent number: 4939117
    Abstract: A leuco dye of the formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 each represent a lower alkyl group; A represents ##STR2## in which R.sup.9 and R.sup.10 each represent hydrogen, provided that both R.sup.9 and R.sup.10 may not be hydrogen, --CN or --COR.sup.14 in which R.sup.14 represents a phenyl group which is unsubstituted or is substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, or a halogen, a naphthyl group which is unsubstituted or is substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a halogen, or a lower alkoxyl group, ##STR3## in which ##STR4## represents a phenyl group or a naphthyl group, R.sup.11 represents hydrogen, a lower alkyl group, a halogen, an amino group, which is unsubstituted or is substituted by an alkyl group having 1 to 4 carbon atoms, or a nitro group, or ##STR5## in which R.sup.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: July 3, 1990
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeru Kusakata, Hiroshi Gotoh, Isao Shiojima
  • Patent number: 4847385
    Abstract: A cyanine dye having formula (I): ##STR1## wherein R.sup.1 represents Cl, Br or hydrogen; R.sup.2 represents Cl, Br, hydrogen, or a nitro group; R.sup.3 and R.sup.4 each represent a methyl group, an ethyl group, a propyl group or --(CH.sub.2).sub.n OR.sup.5 (in which n is an integer of 2 or 3, and R.sup.5 represents hydrogen or an acetyl group), and X.sup..crclbar. represents an acid anion, provided that the case where R.sup.3 and R.sup.4 are both an identical alkyl group, and R.sup.1 and R.sup.2 are an identical group, is excluded; andan optical information recording medium including a recording layer comprising the above cyanine dye.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: July 11, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeru Kusakata, Aimi Suzuki, Isao Shiojima
  • Patent number: 4400456
    Abstract: A thermo-developable type diazo copying material is disclosed comprising a substrate and a photosensitive layer, formed thereon, consisting essentially of a diazo compound, a coupler and a color assistant, wherein said color assistant is at least a member selected from the group consisting of fatty acid amides having the general formula I:R.sup.1 CONH.sub.2(wherein, R.sup.1 is a saturated or unsaturated aliphatic hydrocarbon group having 5 to 24 carbon atoms), N-substituted fatty acid amides having the general formula II:R.sup.1 CONHR.sup.2(wherein, R.sup.1 is the same as defined above and R.sup.2 is an alkyl group having 1 to 5 carbon atoms, substituted or non-substituted phenyl group or substituted or non-substituted cyclohexyl group) and N-substituted fatty acid amides having the general formula III:R.sup.1 NHCOR.sup.2(wherein, R.sup.1 and R.sup.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: August 23, 1983
    Assignee: Ricoh Co., Ltd.
    Inventors: Tsutomu Matsuda, Shigeru Kusakata
  • Patent number: 4179407
    Abstract: Catalyst bed for use in decomposition of ammonia gas, which comprises a mixture of catalysts for use in decomposition of ammonia gas and granules of catalytically inert substances.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: December 18, 1979
    Assignee: Ricoh Co., Ltd.
    Inventors: Kiyotaka Iiyama, Takeshi Matsui, Shigeru Kusakata, Hideo Watanabe, Michihisa Takahashi
  • Patent number: 4056824
    Abstract: A developing chamber and inlet and outlet chambers leading to and from the developing chamber respectively are uniformly heated in such a manner that ammonia gas used as a developing agent and water vapor are prevented from being condensed and contaminating copy sheets.
    Type: Grant
    Filed: September 1, 1976
    Date of Patent: November 1, 1977
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotaka Iiyama, Takeshi Matsui, Shigeru Kusakata, Michihisa Takahashi