Patents by Inventor Naotoshi Kinoshita
Naotoshi Kinoshita 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: 9693965Abstract: Provided are functional drug-containing particles which can be compressed into tablets and in particular, to orally disintegrating tablets by employing any of a dry molding method, a wet molding method, or a humidifying drying method. The functional drug-containing particles comprise substantially spherical drug-containing particles essentially including drug and a binder, the functional drug-containing particles including a functional polymer film selected from the group consisting of an enteric film, a release control film, and a bitter taste masking film, an average particle diameter of said functional drug-containing particles being 400 ?m or less, a particle diameter ratio D90/D10 of the functional drug-containing particles with respect to particle size distribution calculated on a volumetric basis being 1.65 or more, or a coefficient of variation in particle diameters being 24% or more.Type: GrantFiled: May 8, 2013Date of Patent: July 4, 2017Assignees: POWEREX CORPORATION, ZENSEI PHARMACUETICAL INDUSTRIES CO., LTD.Inventors: Tomohiro Hayashida, Junji Yamazaki, Yoshio Nakano, Masaya Hizaki, Naotoshi Kinoshita
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Publication number: 20160120813Abstract: Provided are functional drug-containing particles which can be compressed into tablets and in particular, to orally disintegrating tablets by employing any of a dry molding method, a wet molding method, or a humidifying drying method. The functional drug-containing particles comprise substantially spherical drug-containing particles essentially including drug and a binder, the functional drug-containing particles including a functional polymer film selected from the group consisting of an enteric film, a release control film, and a bitter taste masking film, an average particle diameter of said functional drug-containing particles being 400 ?m or less, a particle diameter ratio D90/D10 of the functional drug-containing particles with respect to particle size distribution calculated on a volumetric basis being 1.65 or more, or a coefficient of variation in particle diameters being 24% or more.Type: ApplicationFiled: May 8, 2013Publication date: May 5, 2016Applicants: POWREX CORPORATION, ZENSEI PHARMACEUTICAL INDUSTRIES CO., LTD.Inventors: Tomohiro HAYASHIDA, Junji YAMAZAKI, Yoshio NAKANO, Masaya HIZAKI, Naotoshi KINOSHITA
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Patent number: 9266142Abstract: A partition portion includes a proximal portion fixed to the outer periphery of the peripheral wall portion and a sealing member mounted to the proximal portion in a manner that the sealing member is allowed to move in inner and outer circumferential directions of the peripheral wall portion. When receiving a force toward an outer circumferential direction, the sealing member is moved in the outer circumferential direction, and a distal end portion thereof is held in press-contact with a sliding contact portion of a ventilation member with a force generated along with the above-mentioned force.Type: GrantFiled: September 6, 2012Date of Patent: February 23, 2016Assignee: KABUSHIKI KAISHA POWREXInventors: Koji Hasegawa, Yasuhiro Hotta, Naotoshi Kinoshita, Tarou Endou, Shuichiro Fukuda, Kazuhiro Uchida, Yosuke Tomita, Hitoshi Kamada, Kazunori Wakabayashi
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Publication number: 20140137797Abstract: A partition portion includes a proximal portion fixed to the outer periphery of the peripheral wall portion and a sealing member mounted to the proximal portion in a manner that the sealing member is allowed to move in inner and outer circumferential directions of the peripheral wall portion. When receiving a force toward an outer circumferential direction, the sealing member is moved in the outer circumferential direction, and a distal end portion thereof is held in press-contact with a sliding contact portion of a ventilation member with a force generated along with the above-mentioned force.Type: ApplicationFiled: September 6, 2012Publication date: May 22, 2014Inventors: Koji Hasegawa, Yasuhiro Hotta, Naotoshi Kinoshita, Tarou Endou, Shuichiro Fukuda, Kazuhiro Uchida, Yosuke Tomita, Hitoshi Kamada, Kazunori Wakabayashi
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Patent number: 8216760Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.Type: GrantFiled: March 7, 2011Date of Patent: July 10, 2012Assignee: Ricoh Company, Ltd.Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
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Publication number: 20110159423Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.Type: ApplicationFiled: March 7, 2011Publication date: June 30, 2011Inventors: Naotoshi KINOSHITA, Tetsuya Tanaka, Masahiro Kawamoto
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Patent number: 7927777Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.Type: GrantFiled: February 25, 2008Date of Patent: April 19, 2011Assignee: Ricoh Company, Ltd.Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
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Patent number: 7879268Abstract: An apparatus for manufacturing a particulate resin, including: a fine nozzle opening configured to extrude a melted resin mixture including a resin; an extrusion output control mechanism for controlling an extrusion output of the melted resin mixture; a collision mechanism configured to collide the melted resin mixture extruded from the fine nozzle opening with a high-temperature gas stream having a temperature of not less than a T1/2 temperature of the resin, so that the melted resin mixture is granulated to provide a particulate resin; a heat retention mechanism configured to retain the particulate resin in an atmosphere having a temperature of not less than a Tg of the resin for 0.01 to 10 seconds; and a cooling mechanism configured to cool the particulate resin; and a method for manufacturing a particulate resin using the apparatus.Type: GrantFiled: November 12, 2007Date of Patent: February 1, 2011Assignee: Ricoh Company LimitedInventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
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Patent number: 7790344Abstract: A method of preparing a powder, including bombarding a spray gas to a liquid material through a spray nozzle to form an atomized liquid material; and solidifying the atomized liquid material, wherein 5 to 40% by weight of the spray gas are previously mixed with the liquid material to form a two-phase flow in a flow path of the spray nozzle, and 60 to 95% by weight of the spray gas is further discharged from a circumference of the flow path discharging the two-phase flow and bombarded thereto to uniformly atomize the liquid material.Type: GrantFiled: April 29, 2008Date of Patent: September 7, 2010Assignee: Ricoh Company LimitedInventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
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Patent number: 7662534Abstract: To provide a method including processing electrophotographic toner constituent material to a fibrous fine precursor and pulverizing and cutting it to obtain a uniform fibrous toner with energy efficiency in an apparatus for producing electrophotographic toner including a nozzle unit containing a nozzle having a flow path tapering toward the nozzle hole at 2° to 20° and a gas nozzle unit containing a gas nozzle and gas flow path tapering toward the nozzle hole at 15° to 33° relative to a direction of a nozzle axis, wherein the toner constituent material containing a raw material A containing a resin and pigment, and a raw material B containing one of a low melting point resin, wax and organic solvent, is extruded from the nozzle at 150° C. to 320° C., and drawn by gas flow from the gas nozzles so as to be a fibrous fluid while controlling the flow rate.Type: GrantFiled: September 10, 2007Date of Patent: February 16, 2010Assignee: Ricoh Company Ltd.Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
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Publication number: 20080305420Abstract: A method for coating particles with a coating liquid including supplying airflow to fluidize the particles; mixing the coating liquid with a spray gas in a two-fluid spray nozzle to form a two-phase flow; and atomizing the two-phase flow with the spray gas to spray a mist of the coating liquid upon the particles. A coating device including a vessel; a fluidizing device configured to supply airflow to fluidize a powder in the vessel; and a spray nozzle configured to mix the coating liquid with a spray gas to form a two-phase flow, and to atomize the two-phase flow with the spray gas to spray a mist of the coating liquid. A particulate carrier for use in electrophotographic developer including particles of a core material and a cover layer thereon and prepared by the coating method mentioned above.Type: ApplicationFiled: June 4, 2008Publication date: December 11, 2008Inventors: Naotoshi KINOSHITA, Tetsuya TANAKA, Masahiro KAWAMOTO, Hiroyuki INA, Jun HITOSUGI
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Publication number: 20080305421Abstract: There is provided a method for producing resinous particles, containing: melting a mixture containing a binder resin and at least one additive having a melting point lower than T1/2 of the binder resin so as to prepare a molten material; atomizing resinous particles from the molten material in an atmosphere having a temperature higher than Tg of the binder resin and lower than 3 times of T1/2 of the binder resin; retaining the resinous particles in an atmosphere having a temperature higher than Tg of the binder resin, and lower than 1.5 times of T1/2 of the binder resin for 1 s to 15 s; and cooling and solidifying the resinous particles.Type: ApplicationFiled: February 25, 2008Publication date: December 11, 2008Inventors: Naotoshi KINOSHITA, Tetsuya TANAKA, Masahiro KAWAMOTO
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Publication number: 20080277490Abstract: A method of preparing a powder, including bombarding a spray gas to a liquid material through a spray nozzle to form an atomized liquid material; and solidifying the atomized liquid material, wherein 5 to 40% by weight of the spray gas are previously mixed with the liquid material to form a two-phase flow in a flow path of the spray nozzle, and 60 to 95% by weight of the spray gas is further discharged from a circumference of the flow path discharging the two-phase flow and bombarded thereto to uniformly atomize the liquid material.Type: ApplicationFiled: April 29, 2008Publication date: November 13, 2008Inventors: Naotoshi KINOSHITA, Tetsuya Tanaka, Masahiro Kawamoto
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Publication number: 20080122132Abstract: An apparatus for manufacturing a particulate resin, including: a fine nozzle opening configured to extrude a melted resin mixture including a resin; an extrusion output control mechanism for controlling an extrusion output of the melted resin mixture; a collision mechanism configured to collide the melted resin mixture extruded from the fine nozzle opening with a high-temperature gas stream having a temperature of not less than a T1/2 temperature of the resin, so that the melted resin mixture is granulated to provide a particulate resin; a heat retention mechanism configured to retain the particulate resin in an atmosphere having a temperature of not less than a Tg of the resin for 0.01 to 10 seconds; and a cooling mechanism configured to cool the particulate resin; and a method for manufacturing a particulate resin using the apparatus.Type: ApplicationFiled: November 12, 2007Publication date: May 29, 2008Inventors: Naotoshi KINOSHITA, Tetsuya Tanaka, Masahiro Kawamoto
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Publication number: 20080063968Abstract: To provide a method including processing electrophotographic toner constituent material to a fibrous fine precursor and pulverizing and cutting it to obtain a uniform fibrous toner with energy efficiency in an apparatus for producing electrophotographic toner including a nozzle unit containing a nozzle having a flow path tapering toward the nozzle hole at 2° to 20° and a gas nozzle unit containing a gas nozzle and gas flow path tapering toward the nozzle hole at 15° to 33° relative to a direction of a nozzle axis, wherein the toner constituent material containing a raw material A containing a resin and pigment, and a raw material B containing one of a low melting point resin, wax and organic solvent, is extruded from the nozzle at 150° C. to 320° C., and drawn by gas flow from the gas nozzles so as to be a fibrous fluid while controlling the flow rate.Type: ApplicationFiled: September 10, 2007Publication date: March 13, 2008Inventors: Naotoshi Kinoshita, Tetsuya Tanaka, Masahiro Kawamoto
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Publication number: 20060173098Abstract: A production process characterized by fluidizing resin particles as a base powder and spraying the fluidized particles with a slurry containing a pigment dispersed therein to coat the surface of the resin particles with the pigment.Type: ApplicationFiled: March 22, 2004Publication date: August 3, 2006Inventors: Hiroyuki Tsujimoto, Chizu Ura, Naotoshi Kinoshita, Masaru Iwato, Kazuki Suhara
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Publication number: 20050191357Abstract: A strong pressure and a strong shearing force are exerted to a mixture, constituted of two kinds or more of powder materials including a drug powder, while causing the mixture to pass between a press section (26) of a press head (24) and a receiving surface (25) of a cylindrical rotator (23), thereby combining the drug powder with the other powder material. For example, at least one of a drug and a biocompatible polymer is made into a nano particle whose average particle diameter is less than 1000 nm, and the nano particle is made into a composite in accordance with a dry mechanical particle combining method, so as to form a polymer nano composite particle. Thus, it is possible to produce a composite particle, which contains a drug under a stable condition, in a short time, and it is possible to remarkably improve its handling property without losing advantages of the nano particle.Type: ApplicationFiled: September 12, 2002Publication date: September 1, 2005Inventors: Yoshiaki Kawashima, Masuo Hosokawa, Hirofumi Takeuchi, Hiromitsu Yamamoto, Masaru Iwato, Kazuki Suhara, Toyokazu Yokoyama, Hiroyuki Tsujimoto, Akira Kondo, Tsunehiro Yoshidomi, Yoshiyuki Inoue, Hisato Eitoku, Naotoshi Kinoshita