Patents by Inventor Hirokazu Kitayama
Hirokazu Kitayama 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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Publication number: 20150286169Abstract: [Object] To provide: a sublimation transfer printing method of a dry developing system, particularly a dry nonmagnetic developing system, still particularly a dry nonmagnetic one -component developing system, said sublimation transfer printing method being capable of achieving a high color depth and inhibiting the staining of non-image areas of a printed product; a printed product obtained by the printing method; an intermediate recording medium which is to be used in the printing method; and a toner.Type: ApplicationFiled: November 6, 2013Publication date: October 8, 2015Inventors: Makoto Teranishi, Yuji Suzuki, Hirokazu Kitayama, Yoshihiro Takai, Kousuke Takai
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Publication number: 20150275425Abstract: [Object] To provide: a sublimation transfer printing method of a dry developing system, particularly a dry nonmagnetic developing system, still particularly a dry nonmagnetic one-component developing system, said sublimation transfer printing method being capable of achieving a high color depth and suppressing the staining of non-image areas of a printed product and the unevenness of printing thereof; a printed product obtained by the printing method; an intermediate recording medium which is to be used in the printing method; and a toner.Type: ApplicationFiled: November 6, 2013Publication date: October 1, 2015Inventors: Makoto Teranishi, Yuji Suzuki, Hirokazu Kitayama, Yoshihiro Takai, Kousuke Takai
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Publication number: 20150056543Abstract: [Problem] To provide a sublimation transfer dyeing method capable of highly efficient dyeing of a product to be dyed by an electrophotographic process using a toner, and a dyed product dyed highly efficiently by the dyeing method. [Solution] A sublimation transfer dyeing method attaches a toner to an intermediate recording medium using an electrophotographic process and sublimation-transfers to a dyed product a dye contained in the toner attached to the intermediate recording medium. A dyed product dyed with high efficiency could be provided by a sublimation transfer dyeing method in which the intermediate recording medium has a density of greater than 1.00 g/cm3.Type: ApplicationFiled: March 13, 2013Publication date: February 26, 2015Inventors: Yuji Suzuki, Makoto Teranishi, Hirokazu Kitayama, Yoshihiro Takai, Kousuke Takai
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Publication number: 20100126377Abstract: The present invention relates to an ink composition containing a phthalocyanine coloring matter represented by the following formula (1): (wherein, each of the rings A to D independently represents a benzene ring or a pyridine ring, M represents a metal atom or the like, X represents a carbonyl group or the like, Y represents a hydrogen atom; a nitro group; a hydroxy group; a sulfo group; a carboxy group; an amino group; an alkoxy group, an alkylthio group, an alkylsulfonyl group which may be substituted; an aryloxy group, an arylthio group, an arylsulfonyl group, a heteroaryloxy group, a heteroarylthio group, a heteroarylsulfonyl group or an amino group, which may be substituted; or the like, and L is from 2 to 8) or a salt thereof; and said ink composition gives, in inkjet printing on plain paper, printed matters exhibiting an extremely excellent water fastness.Type: ApplicationFiled: July 3, 2008Publication date: May 27, 2010Applicant: Nippon Kayaku Kabushiki KaishaInventors: Takashi Yoneda, Takafumi Fujii, Shinsuke Shimizu, Hirokazu Kitayama
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Patent number: 7419537Abstract: The present invention relates to a phthalocyanine colorant characterized in that it has, as substituents, at least one unsubstituted sulfamoyl group and at least one substituted sulfamoyl group, the total number of these groups being 2 to 4, the substituent on the substituted sulfamoyl group has a substituted triazinyl group bonded thereto through a crosslinking group, and the unsubstituted sulfamoyl group and the substituted sulfamoyl group are bonded to the phthalocyanine ring at the ?-position. Said phthalocyanine colorant is suitable for use in an ink, especially a cyan ink, for an ink-jet printer. A printed matter obtained by printing with said ink is excellent in light fastness, ozone fastness and moisture fastness.Type: GrantFiled: March 29, 2004Date of Patent: September 2, 2008Assignee: Nippon Kayaku Kabushiki KaishaInventors: Takafumi Fujii, Hirokazu Kitayama, Shinichi Namba
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Patent number: 7387668Abstract: An azo compound which is reduced in the copper ion content and exhibits hue and clarity suitable for ink-jet recording and which can give records having excellent light fastness, water resistance, and moisture proofness, and such ozone resistance as to control the fading and the discoloration; and water-base yellow inks containing the same.Type: GrantFiled: September 29, 2004Date of Patent: June 17, 2008Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hirokazu Kitayama, Yasuo Shirasaki, Takahiko Matsui, Hiroaki Ohno
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Publication number: 20070119341Abstract: An azo compound which is reduced in the copper ion content and exhibits hue and clarity suitable for ink-jet recording and which can give records having excellent light fastness, water resistance, and moisture proofness, and such ozone resistance as to control the fading and the discoloration; and water-base yellow inks containing the same. In particular, the azo compound represented by the formula (12) having a content of impurity copper ions of 100 ppm or below or salts thereof; and inks containing the same.Type: ApplicationFiled: September 29, 2004Publication date: May 31, 2007Inventors: Hirokazu Kitayama, Yasuo Shirasaki, Takahiko Matsui, Hiroaki Ohno
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Publication number: 20070022903Abstract: The present invention relates to a phthalocyanine colorant characterized in that it has, as substituents, at least one unsubstituted sulfamoyl group and at least one substituted sulfamoyl group, the total number of these groups being 2 to 4, the substituent on the substituted sulfamoyl group has a substituted triazinyl group bonded thereto through a crosslinking group, and the unsubstituted sulfamoyl group and the substituted sulfamoyl group are bonded to the phthalocyanine ring at the ?-position. Said phthalocyanine colorant is suitable for use in an ink, especially a cyan ink, for an ink-jet printer. A printed matter obtained by printing with said ink is excellent in light fastness, ozone fastness and moisture fastness.Type: ApplicationFiled: March 29, 2004Publication date: February 1, 2007Inventors: Takafumi Fujii, Hirokazu Kitayama, Shinichi Namba
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Publication number: 20070006772Abstract: The present invention relates to a phthalocyanine colorant characterized in that it has, as substituents, at least one unsubstituted sulfamoyl group and at least one substituted sulfamoyl group, the total number of these groups being 2 to 4, and the unsubstituted sulfamoyl group and the substituted sulfamoyl group are bonded to the phthalocyanine ring at the ?-position. Said phthalocyanine colorant is suitable for use in an ink, especially a cyan ink, for an ink-jet printer. A printed matter obtained by printing with said ink is excellent in light fastness, ozone fastness and moisture fastness.Type: ApplicationFiled: March 23, 2004Publication date: January 11, 2007Inventors: Takafumi Fujii, Hirokazu Kitayama, Shinichi Namba
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Patent number: 7056374Abstract: An aqueous ink composition which comprises a compound represented by the formula (1) or the salt thereof: (1) wherein R1 and R2 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkanoylamino group, an alkoxyalkoxy group, a sulfonic acid group, a carboxyl group or an ureido group, m and n independently represent 1 or 2, and M1 represents a cation from a hydrogen atom, an alkali metal, an alkaline earth metal or an organic amine, or an ammonium ion. The composition has a hue and clarity suitable for the ink-jet recording, and can provide a recorded matter which is excellent in light resistance, water resistance and moisture resistance and can be controlled with respect to the degree of the discoloration or fading by the action of ozone.Type: GrantFiled: April 1, 2002Date of Patent: June 6, 2006Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hirokazu Kitayama, Yasuo Shirasaki, Toru Tabei
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Publication number: 20060005744Abstract: The present invention relates a yellow dye composition, liquid dye composition, and ink composition which each contains compounds represented by the formulae (1) and (2): Wherein, M and L each represents hydrogen, an alkali metal, alkaline earth metal, cation of an organic amine, or ammonium ion. They have satisfactory long-term storage stability in an aqueous solution having a dyestuff concentration as high as 6 to 10%. They have a hue and vividness which are suitable for ink-jet recording, and are characterized by giving prints high in fastness regarding light fastness, etc.Type: ApplicationFiled: September 20, 2002Publication date: January 12, 2006Inventors: Hirokazu Kitayama, Yasuo Shirasaki
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Patent number: 6814776Abstract: An iron-based rare-earth alloy powder includes: a first iron-based rare-earth alloy powder, which has a mean particle size of 10 &mgr;m to 70 &mgr;m and of which the powder particles have aspect ratios of 0.4 to 1.0; and a second iron-based rare-earth alloy powder, which has a mean particle size of 70 &mgr;m to 300 &mgr;m and of which the powder particles have aspect ratios of less than 0.3. The first and second iron-based rare-earth alloy powders are mixed at a volume ratio of 1:49 to 4:1. In this manner, an iron-based rare-earth alloy powder with increased flowability and a compound to make a magnet are provided.Type: GrantFiled: July 30, 2003Date of Patent: November 9, 2004Assignee: Neomax Co., Ltd.Inventors: Hirokazu Kanekiyo, Hirokazu Kitayama, Satoshi Hirosawa, Toshio Miyoshi
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Publication number: 20040099180Abstract: An aqueous ink composition which comprises a compound represented by the formula (1) or the salt thereof: (1) wherein R1 and R2 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkanoylamino group, an alkoxyalkoxy group, a sulfonic acid group, a carboxyl group or an ureido group, m and n independently represent 1 or 2, and M1 represents a cation from a hydrogen atom, an alkali metal, an alkaline earth metal or an organic amine, or an ammonium ion. The composition has a hue and clarity suitable for the ink-jet recording, and can provide a recorded matter which is excellent in light resistance, water resistance and moisture resistance and can be controlled with respect to the degree of the discoloration or fading by the action of ozone.Type: ApplicationFiled: December 17, 2003Publication date: May 27, 2004Inventors: Hirokazu Kitayama, Yasuo Shirasaki, Toru Tabei
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Publication number: 20040079449Abstract: An iron-based rare-earth alloy powder includes: a first iron-based rare-earth alloy powder, which has a mean particle size of 10 &mgr;m to 70 &mgr;m and of which the powder particles have aspect ratios of 0.4 to 1.0; and a second iron-based rare-earth alloy powder, which has a mean particle size of 70 &mgr;m to 300 &mgr;m and of which the powder particles have aspect ratios of less than 0.3. The first and second iron-based rare-earth alloy powders are mixed at a volume ratio of 1:49 to 4:1. In this manner, an iron-based rare-earth alloy powder with increased flowability and a compound to make a magnet are provided.Type: ApplicationFiled: July 30, 2003Publication date: April 29, 2004Inventors: Hirokazu Kanekiyo, Hirokazu Kitayama, Satoshi Hirosawa, Toshio Miyoshi
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Patent number: 6645283Abstract: The present invention relates to a novel anthrapyridone compound represented by Formula (1) as described below or the salt thereof which has hue and vividness suitable for ink-jet printing and give a print excellent in fastness to light and water, a water-based magenta ink composition containing any of the compounds or salt thereof, an ink-jet printing method using the ink composition and a new intermediate. wherein, R1 is hydrogen atom, an alkyl group etc; R2 is hydrogen atom, methyl etc; X and Y represent independently chlorine atom, hydroxy, etc.Type: GrantFiled: March 7, 2001Date of Patent: November 11, 2003Assignee: Nippon Kayaku Kabushiki KaishaInventors: Hiroyuki Matsumoto, Takafumi Fujii, Yasuo Shirasaki, Hirokazu Kitayama
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Publication number: 20030164114Abstract: The present invention relates to a cyan dye mixture, an ink composition containing the mixture and a method of ink-jet recording with the ink composition. The print obtained by the method is characterized by discoloring or fading little even when allowed to stand in a well ventilated shade or in an ozone gas. The cyan dye mixture comprises compounds which are obtained by chlorosulfonating, as a starting material, copper phthalocyanine or a sulfonated copper phthalocyanine and then aminating the chlorosulfonation product with an aminating agent used in an amount of at least 2.Type: ApplicationFiled: January 17, 2003Publication date: September 4, 2003Inventors: Hirokazu Kitayama, Shinichi Namba, Takafumi Fujii, Junji Otani, Junko Yoshioka, Yasuo Shirasaki
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Patent number: 6589325Abstract: An object of the present invention is to provide a novel phthalocyanine compound or the salt thereof as a black colorant that has a hue suitable for ink-jet recording and can provide a recorded material with strong light fastness and water fastness, an ink composition containing the compound, an ink-jet recording method using the ink composition, a tank containing the ink composition, an ink-jet printer set with the tank, and a colored product colored by the colorant. The novel phthalocyanine compound or the salt thereof can be easily obtained by reacting an aminophthalocyanine with (meth)acrylic acid.Type: GrantFiled: October 9, 2001Date of Patent: July 8, 2003Assignee: Nippon Kayaku Kabushiki KaishaInventors: Yoshinori Katoh, Hirokazu Kitayama, Yasuo Shirasaki
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Patent number: 5662943Abstract: The purpose of this invention is to present fabrication methods and equipment for granulated powders whereby, the reaction between the R--Fe--B-type or R--Co-type rare earth containing alloy powders and the binder is controlled, the residual oxygen and carbon content of the sintered products after sintering is reduced, and whereby it is possible to obtain isotropic or anisotropic granulated powders having good powder flowability and lubrication properties when molding. After stirring a slurry of rare earth containing alloy powders formed by adding a binder consisting of water and at least one of either methyl cellulose, polyacryl amide or polyvinyl alcohol, and mixing, oriented liquid droplets are formed by applying a magnetic field to the slurry to orientate the said powder particles and spraying within the chamber of a spray dryer apparatus.Type: GrantFiled: April 30, 1996Date of Patent: September 2, 1997Assignee: Sumitomo Special Metals Company LimitedInventors: Osamu Yamashita, Tsunekazu Saigo, Seiichi Kohara, Hirokazu Kitayama, Hiroshi Hashikawa
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Patent number: 5575830Abstract: The purpose of this invention is to present fabrication methods and equipment for granulated powders whereby, the reaction between the R-Fe-B-type or R-Co-type rare earth containing alloy powders and the binder is controlled, the residual oxygen and carbon content of the sintered products after sintering is reduced, and whereby it is possible to obtain isotropic or anisotropic granulated powders having good powder flowability and lubrication properties when molding. After stirring a slurry of rare earth containing alloy powders formed by adding a binder consisting of water and at least one of either methyl cellulose, polyacryl amide or polyvinyl alcohol, and mixing, oriented liquid droplets are formed by applying a magnetic field to the slurry to orientate the said powder particles and spraying within the chamber of a spray dryer apparatus.Type: GrantFiled: December 21, 1994Date of Patent: November 19, 1996Assignee: Sumitomo Special Metals Co., Ltd.Inventors: Osamu Yamashita, Tsunekazu Saigo, Seiichi Kohara, Hirokazu Kitayama, Hiroshi Hashikawa
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Patent number: 5529603Abstract: It is an object of the present invention to provide a fire resistance bond magnet having superior temperature properties and most suitable for convergence use in picture tubes for display and high precision television, and alloy powders for bond magnet, without containing Co which is restricted in resources. The flame retardancy bond magnet having superior temperature properties and most suitable for convergence use in picture tubes for display and high precision television can be provided at low cost without containing Co, by using the alloy powders for bond magnet consisting of Al-Ni-Cu-(Ti, Nb)-Fe without Co, and having an isotropy and mean particle sizes of 10 .mu.m to 200 .mu.m, and kneading, molding and curing the 20 wt % to 80 wt % alloy powders together with a chlorine flame retardant, a flame retardant assistant such as antimony trioxide and zinc boric acid and a binder.Type: GrantFiled: June 17, 1994Date of Patent: June 25, 1996Assignee: Sumitomo Special Metals Company LimitedInventors: Michio Yamashita, Hirokazu Kitayama, Yoshihiko Nishino, Toshihiro Hurukawa