Patents by Inventor Katsumi Kuriyama
Katsumi Kuriyama 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: 8292996Abstract: An oily inkjet ink comprises a pigment, a dispersant, and an organic solvent. The organic solvent contains an ester solvent and/or an alcohol solvent. A containing quantity of a water-soluble ingredient in the pigment is equal to at most 0.15% by mass.Type: GrantFiled: December 28, 2010Date of Patent: October 23, 2012Assignee: Riso Kagaku CorporationInventors: Katsumi Kuriyama, Kengo Sugaya, Kenji Yamada
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Publication number: 20120210908Abstract: An oil-based inkjet ink includes at least a pigment, a dispersant and an organic solvent, wherein a calcium content in the ink is 8 ppm or less, and a magnesium content in the ink is 3 ppm or less.Type: ApplicationFiled: July 15, 2010Publication date: August 23, 2012Applicant: RISO KAGAKU CORPORATIONInventors: Toshihiro Endo, Masakatsu Arai, Kenji Yamada, Katsumi Kuriyama, Atsushi Tanaka, Kazuya Kawakami, Shin-ichiro Shimura, Shotaro Kon, Yoshiaki Matsuzawa, Kohji Nomura
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Publication number: 20110226157Abstract: An oily inkjet ink comprises a pigment, a dispersant, and an organic solvent. The organic solvent contains an ester solvent and/or an alcohol solvent. A containing quantity of a water-soluble ingredient in the pigment is equal to at most 0.15% by mass.Type: ApplicationFiled: December 28, 2010Publication date: September 22, 2011Applicant: RISO KAGAKU CORPORATIONInventors: Katsumi KURIYAMA, Kengo SUGAYA, Kenji YAMADA
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Patent number: 5922808Abstract: A PVA-base copolymer is obtained by subjecting a lactone, whose ring is formed of 3 to 10 carbon atoms, to ring-opening polymerization in the presence of polyvinyl alcohol (PVA). The copolymer comprises a PVA chain and an aliphatic polyester grafted as a ring-opened polymer of the lactone on the PVA chain. Further, the copolymer has a PVA content of 2 to 98 wt. %, a polyester content of 98 to 2 wt. %, and a number average molecular weight of 10,000 to 500,000.Type: GrantFiled: June 25, 1997Date of Patent: July 13, 1999Assignees: Dainichiseika Color&Chemicals Mfg. Co., Ltd, Ukima Colour&Chemicals Mfg. Co., LtdInventors: Kazuyuki Hanada, Katsumi Kuriyama
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Patent number: 5904974Abstract: A PVA-base copolymer is obtained by subjecting a lactone, whose ring is formed of 3 to 10 carbon atoms, to ring-opening polymerization in the presence of polyvinyl alcohol (PVA). The copolymer comprises a PVA chain and an aliphatic polyester grafted as a ring-opened polymer of the lactone on the PVA chain. Further, the copolymer has a PVA content of 2 to 98 wt. %, a polyester content of 98 to 2 wt. %, and a number average molecular weight of 10,000 to 500,000.Type: GrantFiled: June 25, 1997Date of Patent: May 18, 1999Assignees: Dainichiseika Color & Chemicals Mfg.Co., Ltd, Ukima Colour & Chemicals Mfg. Co., LtdInventors: Kazuyuki Hanada, Katsumi Kuriyama
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Patent number: 5621042Abstract: Coating compositions are described. They contain, as a film-forming component, a fluoropolymer with a silane-coupling agent containing at least one free isocyanate group. The fluoropolymer may also have been modified with a reaction product of a polysiloxane or fluorine compound containing a reactive organic functional group with an organic polyisocyanate, which reaction product contains at least one free isocyanate group.Type: GrantFiled: July 20, 1995Date of Patent: April 15, 1997Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg, Co., Ltd.Inventors: Kazuyuki Hanada, Setsuo Hirose, Katsumi Kuriyama
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Patent number: 5571623Abstract: Fine polyurethane particles or fine polyurethane gel particles, which have been surface-covered with colloidal polyurea particles, are provided. They are produced by emulsion polymerization of a polyisocyanate compound and an active-hydrogen-containing compound in an inert liquid while using colloidal polyurea particles as an emulsifier.Type: GrantFiled: September 27, 1994Date of Patent: November 5, 1996Assignees: Dainichiseika Color & Chemical Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg, Co., Ltd.Inventors: Katsumi Kuriyama, Takao Endoh, Teruo Akita
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Patent number: 5485016Abstract: A mass spectrometer for analyzing trace impurities on a level between ppt and ppb contained in silicon material gas such as monosilane gas. The mass spectrometer includes an ion formation region, reaction region, and mass analysis region. Ion formation gas is introduced into the ion formation region and sample gas (silicon material gas) is introduced into the reaction region. The ion formation region ionizes ion formation gas by an ionizer and forms primary ions. When the pressure of ion formation gas is made higher than the pressure of sample gas, the ion formation gas flows into the reaction region from the ion formation region together with primary ions and is mixed with the sample gas. In the reaction region, an ion-molecule reaction is produced between the primary ions and trace impurities contained in the sample gas and the trace impurities contained in the sample gas are ionized.Type: GrantFiled: April 25, 1994Date of Patent: January 16, 1996Assignees: Hitachi, Ltd., Hitachi Tokyo Electronics Co., Ltd.Inventors: Takashi Irie, Yasuhiro Mitsui, Kazuaki Mizokami, Katsumi Kuriyama
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Patent number: 5384365Abstract: A release agent comprising a resin containing siloxane segments is described. The resin has been modified with a silane coupling agent containing at least one free isocyanate group and contains one or more hydrolyzable silyl groups in side chains of its molecule.Type: GrantFiled: December 29, 1993Date of Patent: January 24, 1995Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Kazuyuki Hanada, Iwao Misaizu, Masashi Saito, Katsutoshi Torii, Katsumi Kuriyama
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Patent number: 5321083Abstract: Disclosed herein are coating compositions comprising a fluoropolymer modified with a modifier. The modifier is a reaction product of at least one compound selected from polysiloxane compounds, fluorine-containing compounds and silane coupling agents, each containing at least one reactive organic functional group, with an organic polyisocyanate; and contains at least one free isocyanate group.Type: GrantFiled: May 12, 1992Date of Patent: June 14, 1994Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Kazuyuki Hanada, Iwao Misaizu, Katsumi Kuriyama
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Patent number: 5262492Abstract: Siloxane-modified polyester resins are disclosed. These resins comprise a copolymer of a siloxane compound, which contains at least one active hydrogen atom, and a lactone compound. The copolymer is substantially free of unreacted siloxane compound. The siloxane-modified polyester resins are useful for the production of heat-sensitive recording material, magnetic recording media and release agents. Processes for the production of the siloxane-modified polyester resins are also disclosed.Type: GrantFiled: April 9, 1992Date of Patent: November 16, 1993Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Kazuyuki Hanada, Iwao Misaizu, Akihiko Shibuya, Katsumi Kuriyama
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Patent number: 5192736Abstract: A heat-sensitive recording material comprises a base sheet material, a heat-sensitive recording layer provided on one side of the base sheet material and a heat-resistant layer provided on the other side of the base sheet material. The heat-resistant layer is formed of a resin which is modified with a silane coupling agent, which contains at least one free isocyanate group, and containing one or more hydrolyzable silyl groups in side chains of its molecule.Type: GrantFiled: December 24, 1991Date of Patent: March 9, 1993Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Kazuyuki Hanada, Iwao Misaizu, Masashi Saito, Katsutoshi Torii, Katsumi Kuriyama
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Patent number: 5068295Abstract: A water and oil repellant contains a copolymer of a first vinyl monomer having a perfluoroalkyl group, a second vinyl monomer having a polyorganosiloxane chain and a third vinyl monomer having an isocyanate group or blocked isocyanate group as essential components. As an alternative, a water and oil repellant contains a copolymer of a first vinyl monomer having a polyorganosiloxane chain and a second vinyl monomer having an isocyanate group or blocked isocyanate group, in combination with a water and oil repellant compound having a perfluoroalkyl group.Type: GrantFiled: February 9, 1990Date of Patent: November 26, 1991Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Iwao Misaizu, Kazuyuki Hanada, Akihiko Shibuya, Katsumi Kuriyama
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Patent number: 5024893Abstract: A polyurethane resin is composed of a polyol component, a polyisocyanate component and optionally, a chain extender component. At least a portion of the polyol component or chain extender component is a siloxane polyol component represented by the following formula (1) and/or formula (2): ##STR1## wherein R means an alkyl group, R' denotes a hydrogen atom or C.sub.1-5 alkyl group, k, l and m stand for 1-250, 0-5 and 0-50 respectively, and n is an integer of 1-3 in the formula (1) and an integer of 2-3 in the formula (2). A thermal recording material containing the polyurethane resin as a heat-resistant layer is also disclosed.Type: GrantFiled: May 2, 1990Date of Patent: June 18, 1991Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co. Ltd.Inventors: Kazuyuki Hanada, Kohichi Kuroda, Iwao Misaizu, Masashi Kashimura, Tomoko Goto, Katsumi Kuriyama
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Patent number: 4996422Abstract: A mass spectrometer, including an evacuable vessle, mass separation means provided in the evacuable vessel for separating ions in accordance with the mass thereof, and ion detection means provided in the evacuable vessel for detecting ions emitted from the mass separation means to convert the emitted ions into an electric signal, in which the ion detection means includes an electron-multiplier for detecting positive ions and a photo-multiplier for detecting negative ions. According to this mass spectrometer, positive ions can be detected at high sensitivity, and negative ions are readily detected.Type: GrantFiled: June 1, 1989Date of Patent: February 26, 1991Assignees: Hitachi, Ltd., Hitachi Tokyo Electronics Co., Ltd.Inventors: Yasuhiro Mitsui, Keiji Hasumi, Shinichiro Watase, Katsumi Kuriyama, Kazuo Nakano
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Patent number: 4972855Abstract: A shredded tobacco leaf pellet is composed of tobacco leaf shreds bound together with a nicotine-non-absorptive thermoplastic binder while retaining air permeability. The pellet is produced by mixing tobacco leaf shreds and a nicotine-non-absorptive thermoplastic binder, forming the resultant mixture into a desired shape while retaining air permeability, and then subjecting the thus-formed mixture to a heat treatment. A cigarette-like snuff is composed of at least one shredded tobacco leaf pellet of the above-described type and an outer envelope surrounding the pellet therein.Type: GrantFiled: April 26, 1989Date of Patent: November 27, 1990Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Kowa Display Company, Inc.Inventors: Katsumi Kuriyama, Shigeru Ogawa, Mizuho Ohtomo, Kohichi Kuroda, Tadashi Saito
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Patent number: 4942212Abstract: A polyurethane resin is composed of a polyol component, a polyisocyanate component and optionally, a chain extender component. At least a portion of the polyol component or chain extender component is a siloxane polyol component represented by the following formula (1) and/or formula (2): ##STR1## wherein R means an alkyl group, R' denotes a hydrogen atom or C.sub.1-5 alkyl group, k, l and m stand for 1-250, 0-5 and 0-50 respectively, and n is an integer of 1-3 in the formula (1) and an integer of 2-3 in the formula (2). A thermal recording material containing the polyurethane resin as a heat-resistant layer is also disclosed.Type: GrantFiled: December 6, 1988Date of Patent: July 17, 1990Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Kazuyuki Hanada, Kohichi Kuroda, Iwao Misaizu, Masashi Kashimura, Tomoko Goto, Katsumi Kuriyama
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Patent number: 4853418Abstract: A polyurethane emulsion is composed of an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains and water emulsified in the organic solvent solution. A sheet-like porous material having a porous layer of a polyurethane resin provided on a base material is produced by using the above polyurethane emulsion to form the porous layer.Type: GrantFiled: August 8, 1988Date of Patent: August 1, 1989Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Kazuyuki Hanada, Iwao Misaizu, Masashi Kashimura, Tomoko Goto, Katsumi Kuriyama
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Patent number: 4837198Abstract: A heat-sensitive recording medium is composed of a base sheet, a heat-sensitive recording layer provided on one side of the base sheet and a heat-resistant layer provided on the other side of the base sheet. The heat-resistant layer is made of a film-forming resin modified with a modifier, which is a reaction product of a fluorine compound containing at least one reactive organic functional group and an organic polyisocyanate.Type: GrantFiled: August 27, 1987Date of Patent: June 6, 1989Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemiclas Mfg. Co., Ltd.Inventors: Katsumi Kuriyama, Kazuyuki Hanada, Susumu Nakamura, Iwao Misaizu, Masashi Kashimura, Tomoko Goto
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Patent number: 4746684Abstract: A polyurethane dispersion contains (A) an organic solvent, (B) a polyurethane resin having a molecular weight of 20,000-500,000, and (C) fine particles obtained from an active-hydrogen containing polyfunctional compound, which contains functional groups having a molecular weight of 50 or smaller per functional group, and an organic polyisocyanate. The dispersion can be converted into an emulsion by emulsifying water therein. A sheet-like porous material is also obtained by impregnating and/or coating a base material with the emulsion, causing the thus-coated emulsion to gel and then drying the resultant base material. The dispersion has excellent stability. The emulsion can be gelatinized at a relatively high temperature in a rather short period time, thereby permitting efficient production of the sheet-like porous material. The sheet-like material has a very fine porous structure, is excellent in various properties and has superb water vapor transmission characteristics.Type: GrantFiled: May 13, 1987Date of Patent: May 24, 1988Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Katsumi Kuriyama, Misao Ichihara, Iwao Misaizu, Masashi Kashimura