Patents by Inventor Kazuhisa Saito
Kazuhisa Saito 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: 8524122Abstract: A production method capable of producing ITO particles without using a solvent with a high boiling point as a solvent used in the producing step by a simple treatment method without through a heating process in an atmosphere which disadvantageously causes sintering among the ITO particles to coarsen the ITO particles. An ITO powder suitable for a coating material for a transparent electroconductive material, being produced by a first step of dissolving salt containing indium and salt containing tin into an organic solvent, then adding to this organic solvent, an organic solvent containing a basic precipitant, to thereby manufacture a mixture of a precursor containing indium and tin, and the organic solvent; and a second step of applying heat treatment to the mixture of the precursor containing indium and tin, and the organic solvent in a pressurizing vessel at 200° C. or more and 300° C. or less, to generate ITO particles.Type: GrantFiled: June 30, 2009Date of Patent: September 3, 2013Assignees: Tohoku University, Dowa Electronics Materials Co., Ltd.Inventors: Atsushi Muramatsu, Kiyoshi Kanie, Kazuhisa Saito, Koji Tanoue, Akira Nagatomi
-
Publication number: 20110175041Abstract: ITO powder and a producing method of the same, capable of producing ITO particles without using a solvent with a high boiling point by a simple treatment method without a heating process in an atmosphere which causes sintering. Also, an ITO powder is provided, which is suitable for a coating material for a transparent electroconductive material, the ITO powder being produced by a first step of dissolving salt containing indium and salt containing tin into an organic solvent, then adding to this organic solvent, an organic solvent containing a basic precipitant, to manufacture a precursor; and a second step of applying heat treatment to the precursor in a pressurizing vessel, to thereby generate ITO particles.Type: ApplicationFiled: June 30, 2009Publication date: July 21, 2011Applicants: TOHOKU UNIVERSITY, DOWA ELECTRONICS MATERIALS CO., LTD.Inventors: Atsushi Muramatsu, Kiyoshi Kanie, Kazuhisa Saito, Koji Tanoue, Akira Nagatomi
-
Patent number: 7575359Abstract: It is a light guide plate characterized by having a groove in a snaking pattern formed on a transparent plate made of acrylic or other materials with light transmitting characteristics. It substantially increases efficiency and its manufacturing cost can be greatly reduced.Type: GrantFiled: March 24, 2004Date of Patent: August 18, 2009Assignee: Worldvision Co., Ltd.Inventor: Kazuhisa Saito
-
Publication number: 20080211429Abstract: An improved LED lamp not suffering from excessive heat generation with bright illuminating property, includes an LED array having one or more of LED devices arranged, a mounting base for mounting the LED array thereon, and a light guide member extending to cover the LED array on the mounting base, the light guide member being made of white translucent acrylic resin having a transmittance from 60% to 88%. Where the light guide member has lens function and ultraviolet absorbing function, the light emitted from the lamp can be expanded well with containing less ultraviolet rays.Type: ApplicationFiled: May 22, 2007Publication date: September 4, 2008Applicants: Kazuhisa Saito, Kenichi YoshikawaInventor: Kazuhisa Saito
-
Patent number: 7080451Abstract: A method of manufacturing an electronic component with a contact having a terminal section for brazing and a contact section includes steps that construct a contact base member of a material that is poorly wettable, forms a primer plating layer of a material that is poorly wettable to the weld brazing material on the base member, forms a finish plating layer of a material that is highly wettable to the weld brazing material on the primer plating layer, and selectively removes a portion of the finish plating layer to obtain an exposed region of the primer plating layer that serves as an arresting region for arresting the weld brazing material from creeping up and migrating along the highly wettable finish plating layer in brazing the terminal section to the brazing pad of a wiring board.Type: GrantFiled: November 26, 2003Date of Patent: July 25, 2006Assignee: Japan Aviation Electronics Industry LimitedInventors: Kazuhisa Saito, Asuka Hosoda, Hiroshi Akimoto
-
Publication number: 20060146575Abstract: It is a light guide plate characterized by having a groove in a snaking pattern formed on a transparent plate made of acrylic or other materials with light transmitting characteristics. It substantially increases efficiency and its manufacturing cost can be greatly reduced.Type: ApplicationFiled: March 24, 2004Publication date: July 6, 2006Inventor: Kazuhisa Saito
-
Publication number: 20040121659Abstract: An electronic component is obtained by forming a primer plating layer of a material which is poorly wettable to a weld brazing material 3 on a base member 11X of a contact 11 having a terminal section 111 for brazing and a contact section 112, and then forming a finish plating layer of a material which is highly wettable to the weld brazing material on the primer plating layer. An exposed region of the poorly wettable primer plating layer is formed thereafter by selectively removing a portion of the finish plating layer at the terminal section 111 and served as an arresting region for arresting the weld brazing material 3 from creeping up and migrating along the highly wettable plating layer in brazing the terminal section 111 to the brazing pad 22 of a wiring board 2.Type: ApplicationFiled: November 26, 2003Publication date: June 24, 2004Applicant: Japan Aviation Electronics Industry LimitedInventors: Kazuhisa Saito, Asuka Hosoda, Hiroshi Akimoto
-
Patent number: 6712625Abstract: An electronic component is obtained by forming a primer plating layer of a material which is poorly wettable to a weld brazing material 3 on a base member 11X of a contact 11 having a terminal section 111 for brazing and a contact section 112, and then forming a finish plating layer of a material which is highly wettable to the weld brazing material on the primer plating layer. An exposed region of the poorly wettable primer plating layer is formed thereafter by selectively removing a portion of the finish plating layer at the terminal section 111 and served as an arresting region for arresting the weld brazing material 3 from creeping up and migrating along the highly wettable plating layer in brazing the terminal section 111 to the brazing pad 22 of a wiring board 2.Type: GrantFiled: April 27, 2001Date of Patent: March 30, 2004Assignee: Japan Aviation Electronics Industry LimitedInventors: Kazuhisa Saito, Asuka Hosoda, Hiroshi Akimoto
-
Patent number: 6506264Abstract: A ferromagnetic powder containing iron as the principal component and containing more than 5 to 50 at. % Co, 0.1 to 30 at. % Al, 0.1 to 10 at. % of a rare earth element inclusive of Y, 0.05% by weight or less of an element belonging to Group 1a of the Periodic Table, and 0.1% by weight or less (inclusive of 0% by weight) of an element belonging to Group 2a of the Periodic Table, the powder comprising flat acicular particles having a mean major axis length of 0.01 to 0.40 &mgr;m and a crystallite diameter as determined by X-ray diffraction (Dx) of 50 to 250 angstrom, provided that the cross section diameter in the minor axis direction cut perpendicular to the major axis has a larger width and a smaller width, and that this cross section ratio in the minor axis direction, which is a larger width to smaller width ratio, uniformly yields a value of greater than 1, preferably 1.5 or higher, and the powder yielding a &sgr;s/Dx ratio of 0.Type: GrantFiled: August 10, 2000Date of Patent: January 14, 2003Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Kazushi Sano, Akio Sawabe, Akito Inoue, Kenichi Inoue
-
Patent number: 6440545Abstract: A powder for use in the lower layer of a coating magnetic recording medium, comprising acicular particles with a mean major axis length in a range of from 0.01 to 0.5 &mgr;m and a mean minor axis length in a range of from 0.01 to 0.05 &mgr;m, provided that the acicular particles are flat acicular particles which, when cut in a direction perpendicular to the major axis, uniformly exhibit a cross section having a larger width to smaller width ratio of greater than 1, and that the quantity of discharged H2O at 100° C. is in a range of from 0.1 to 2.0% by weight.Type: GrantFiled: August 9, 2000Date of Patent: August 27, 2002Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Kazushi Sano, Yoshichika Horikawa
-
Publication number: 20020049008Abstract: An electronic component is obtained by forming a primer plating layer of a material which is poorly wettable to a weld brazing material 3 on a base member 11X of a contact 11 having a terminal section 111 for brazing and a contact section 112, and then forming a finish plating layer of a material which is highly wettable to the weld brazing material on the primer plating layer. An exposed region of the poorly wettable primer plating layer is formed thereafter by selectively removing a portion of the finish plating layer at the terminal section 111 and served as an arresting region for arresting the weld brazing material 3 from creeping up and migrating along the highly wettable plating layer in brazing the terminal section 111 to the brazing pad 22 of a wiring board 2.Type: ApplicationFiled: April 27, 2001Publication date: April 25, 2002Applicant: Japan Aviation Electronics Industry LimitedInventors: Kazuhisa Saito, Asuka Hosoda, Hiroshi Akimoto
-
Patent number: 6171692Abstract: Iron oxyhydroxide particles that are composed of acicular particles having an average major axis of 0.01 to 0.5 &mgr;m and containing not less than 0.1 wt. % and not more than 30 wt. % of Al in the iron oxyhydroxide and that release not less than 0.1 wt. % and not more than 2 wt. % of H2O at 100° C. are used as particles of a lower layer of a coating type magnetic recording medium having a multi-layer structure. The acicular particles include ones having two or more branches whose branching direction is skewed toward a two-dimensional orientation.Type: GrantFiled: February 11, 2000Date of Patent: January 9, 2001Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Kazushi Sano, Shinichi Konno, Yoshichika Horikawa, Yasuhiko Aihara
-
Patent number: 6040043Abstract: Iron oxyhydroxide particles that are composed of acicular particles having an average major axis of 0.01 to 0.5 .mu.m and containing not less than 0.1 wt. % and not more than 30 wt. % of Al in the iron oxyhydroxide and that release not less than 0.1 wt. % and not more than 2 wt. % of H.sub.2 O at 100.degree. C. are used as particles of a lower layer of a coating type magnetic recording medium having a multi-layer structure. The acicular particles include ones having two or more branches whose branching direction is skewed toward a two-dimensional orientation.Type: GrantFiled: November 20, 1997Date of Patent: March 21, 2000Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Kazushi Sano, Shinichi Konno, Yoshichika Horikawa, Yasuhiko Aihara
-
Patent number: 5902676Abstract: A coating type magnetic recording medium having a multilayer structure exhibits excellent strength, surface smoothness, and weather resistance is formed on a substrate, and comprises a magnetic layer of magnetic particles dispersed in a resinous binder, and a non-magnetic layer of non-magnetic particles dispersed in a resinous binder. The magnetic particles are composed of acicular ferromagnetic metal particles of Fe containing Co, Al, rare earth elements, periodic table group 1a and 2a elements. The non-magnetic particles are composed of acicular particles of .alpha.-FeOOH.Type: GrantFiled: August 27, 1997Date of Patent: May 11, 1999Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Kazushi Sano, Shinichi Konno, Yoshichika Horikawa, Yasuhiko Aihara
-
Patent number: 5591535Abstract: There is provided an accicular ferromagnetic metal powder with which one can produce magnetic media for high-density recording that are improved in storage stability and magnetic characteristics.The improved ferromagnetic metal powder essentially consists of iron and 50 atm % based on the amount of iron of cobalt and at least one of aluminum and yttrium or any other rare earth element and contains no more than 0.05 wt % of an element of Group Ia of the periodic table (Li, Na, K). The amount of aluminum is in the range of 0.1-30 atm %, the amount of yttrium or any other rare earth element is in the range of and 0.1-10 atm %, each being based on the total quantity of the metal elements present. In either of these cases, the residue of an element of Group IIa of the periodic table (Mg, Ca, Sr, Ba) is preferably 0.1 wt % or less.Type: GrantFiled: May 1, 1995Date of Patent: January 7, 1997Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Satoshi Aizawa, Kazushi Sano, Kazuyuki Matsumoto, Kenji Murata
-
Patent number: 5534361Abstract: There is provided a metallic magnetic powder with which one can produce magnetic media for high-density recording that are improved in storage stability and magnetic characteristics.The improved ferromagnetic metal powder contains no more than 0.05 wt % of an element of Group Ia of the periodic table. The powder may optionally contain 0.1-30 atm % of aluminum and/or 0.1-10 atm % of Y or any other rare earth element based on the total quantity of the metal elements present. In either of these cases, the residue of an element of Group IIa of the periodic table is preferably 0.1 wt % or less.Type: GrantFiled: June 27, 1994Date of Patent: July 9, 1996Assignee: Dowa Mining Co., Ltd.Inventors: Seiichi Hisano, Kazuhisa Saito, Satoshi Aizawa, Kazushi Sano, Kazuyuki Matsumoto, Kenji Murata
-
Patent number: 5030282Abstract: A carbon fiber-reinforced cementitious composite having high strength, which comprises continuous carbon fibers and a cured cement composition, comprising cement particles having an average particle size up to about the average diameter of the carbon fibers, the cured cement composition being substantially interposed between the individual carbon fibers; and a method for producing it.Type: GrantFiled: July 10, 1989Date of Patent: July 9, 1991Assignees: Toho Rayon Co., Ltd., Taisei CorporationInventors: Toshikazu Matsuhashi, Kuniomi Suzuki, Kazuhisa Saito, Hiroyasu Ogawa, Masahide Aga, Teruo Yamamiya, Kenji Sugimoto, Yutaka Tsuruta
-
Patent number: 4401533Abstract: A method for producing carbon fibers exhibiting excellent adhesive properties to resins and having high strength and heat-oxidation resistance, comprising electrically treating high strength carbon fiber in an aqueous solution of a sulfuric acid salt under conditions such that the current density is from about 0.05 to 0.5 A/m.sup.2 and the product of current density, voltage, and processing time is from about 0.02 to 8 A-V-min/m.sup.2, while continuously moving the carbon fiber as an anode in the aqueous solution.Type: GrantFiled: March 5, 1981Date of Patent: August 30, 1983Assignee: Toho Belson Co., Ltd.Inventors: Kazuhisa Saito, Hiroyasu Ogawa, Tetsuro Shigei
-
Patent number: 4397831Abstract: An acrylonitrile based fiber is disclosed which is composed of copolymers comprising at least 96 mole % of acrylonitrile and 1.times.10.sup.-2 to 70.times.10.sup.-2 mole % of a vinyl component or vinyl components containing acidic groups, and containing a specific amount of zinc. The fiber is used in production of oxidized or flame resistant fiber. The oxidized or flame resistant fiber is produced by heat-treating or oxidizing the acrylonitrile based fiber in an oxidation furnace equipped with a plurality of roller units while limiting the shrinkage of the acrylonitrile based fiber within specific limits as the oxidation proceeds. On carbonizing the above oxidized or flame resistant fiber while limiting the shrinkage thereof a carbon fiber which is of high strength and low fluffing is obtained.Type: GrantFiled: October 27, 1980Date of Patent: August 9, 1983Assignee: Toho Belson Co., Ltd.Inventors: Kazuhisa Saito, Hiroyasu Ogawa
-
Patent number: 4304746Abstract: A process for producing preoxidized fiber spun yarns is described comprising subjecting an acrylonitrile fiber tow to a preoxidation, applying a surface active agent, stretch cutting without crimping, crimping to form slivers, processing in a gilling step, and spinning; according to this process, short fibers and powders of fibers are formed to a lesser extent, and nebs, slubs and flies, etc. are caused to a lesser extent, and preoxidized fiber spun yarns having high quality are obtained in a high yield.Type: GrantFiled: December 8, 1980Date of Patent: December 8, 1981Assignee: Toho Beslon Co., Ltd.Inventors: Kozo Yamada, Takenobu Hasebe, Kazuhisa Saito