Patents by Inventor Shinji Umeki
Shinji Umeki 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: 20210101446Abstract: A temperature adjustment device controller is configured to determine a temperature adjustment control basic value from a necessary temperature adjustment control amount calculated based on a parameter including environmental information, set a target blowing temperature of temperature adjustment air based on the temperature adjustment control basic value, and set a target blowing amount of the temperature adjustment air based on the temperature adjustment control basic value, an open-closed state of a movable roof, and a vehicle speed.Type: ApplicationFiled: October 5, 2020Publication date: April 8, 2021Applicants: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Toshiki Nakanishi, Kozo Matsumoto, Takashi Kubokura, Motoki Tatara, Hiroshi Yamaguchi, Shinji Umeki, Kenji Ishida, Shunsuke Tanaka, Naoki Mizutani
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Patent number: 4451502Abstract: A method for manufacturing a magnetic recording medium including the steps of applying a magnetic coating containing magnetic particles therein to a support, subjecting said support having the magnetic coating thereon to magnetic orientation treatment while the magnetic coating is still in fluid condition and thereafter drying the magnetic coating, characterized in that said magnetic orientation is effected by passing said support having the magnetic coating thereon through a magnetic orientation field generated from magnetic field generating means which comprises one or more permanent or DC magnets and an array of a plurality of parallel elongated members of a soft magnetic material arranged substantially in a plane close and parallel to said support and adapted to be magnetized by said magnet or magnets.Type: GrantFiled: August 20, 1982Date of Patent: May 29, 1984Inventors: Kazuo Takada, Shinji Umeki
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Patent number: 4363831Abstract: A magnetic iron oxide powder which has high coercive force and stable magnetic characteristics is produced by forming a surface layer of the magnetic iron oxide powder which comprises a cobalt compound as a main component. The magnetic iron oxide powder is treated with an aqueous solution of a cobalt ion for two times or more to form at least two surfaces comprising the cobalt compound.Type: GrantFiled: September 26, 1980Date of Patent: December 14, 1982Assignee: TDK Electronics Co., Ltd.Inventors: Shinji Umeki, Kazuo Takada
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Patent number: 4323464Abstract: A hydrated iron oxide comprising a silicon component and a phosphorus component is produced by adding a silicate and a phosphate in an aqueous solution of a base and mixing it with an aqueous solution of a ferrous if necessary with a small amount of zinc ion and oxidizing it under controlling pH in a range of 5.5 to 7.5.Type: GrantFiled: April 24, 1980Date of Patent: April 6, 1982Assignee: TDK Electronics Co., Ltd.Inventor: Shinji Umeki
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Patent number: 4321302Abstract: A magnetic iron oxide powder having high coercive force is produced by dispersing a magnetic iron oxide comprising a silicon component and a phosphorus component in an aqueous solution of a cobalt ion and adding a base to the dispersion to be an alkaline condition and heat-treating the dispersion whereby the cobalt ion is adsorbed and diffused in the surface layer of the magnetic iron oxide. A zinc component can be also incorporated in the crystal. The silicon component and the phosphorus component are preferably incorporated in the crystalline structure.Type: GrantFiled: April 24, 1980Date of Patent: March 23, 1982Assignee: TDK Electronics Co., Ltd.Inventors: Shinji Umeki, Toshihiro Hamabata, Kazuaki Onuki, Kazuo Takada
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Patent number: 4311684Abstract: In a process for producing an iron oxide having magnetite as a main component by heating to reduce a powder of an iron oxide or a hydrated iron oxide in an atmosphere for reduction, an improvement characterized in that said atmosphere for reduction comprises an inert gas, steam and a gas of an organic compound for reducing an iron oxide.Type: GrantFiled: April 24, 1980Date of Patent: January 19, 1982Assignee: TDK Electronics Co., Ltd.Inventor: Shinji Umeki
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Patent number: 4305921Abstract: In a process for producing an iron oxide having magnetite as a main component by heating to reduce a powder of an oxide or a hydrated iron oxide comprising an iron oxide as a main component in an atmosphere for reduction, an improvement characterized in that said atmosphere for reduction is formed by passing an industrial liquefied nitrogen gas.Type: GrantFiled: April 24, 1980Date of Patent: December 15, 1981Assignee: TDK Electronics Co., Ltd.Inventor: Shinji Umeki
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Patent number: 4302510Abstract: A magnetic recording medium having more than 550 Oersted of a coercive force, less than 1.8 of a ratio of a coercive force at -196.degree. C. to a coercive force at 25.degree. C., less than 1.0 wt. % of a content of Fe.sup.2+ is prepared by incorporating a magnetic powder obtained by dispersing acicular .gamma.-Fe.sub.2 O.sub.3 in an aqueous solution of a cobalt salt and reducing it with a reducing agent to deposit a cobalt compound on the acicular .gamma.-Fe.sub.2 O.sub.3.Type: GrantFiled: April 25, 1980Date of Patent: November 24, 1981Assignee: TDK Electronics Co., Ltd.Inventors: Shinji Umeki, Kazuaki Onuki, Fumio Maruta
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Patent number: 4255409Abstract: An alkali hydroxide is added to an aqueous solution of ferrous salt to form a precipitate and a part of the solution is separated to control a ratio of an anion to a ferrous component to less than 1 and the ferrous component is oxidized to acicular goethite with an alkali metal chlorate such as potassium chlorate.Type: GrantFiled: December 11, 1979Date of Patent: March 10, 1981Assignee: TDK Electronics Company LimitedInventors: Toshihiro Hamabata, Shinji Umeki
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Patent number: 4251504Abstract: An alkali hydroxide is added to an aqueous solution of ferrous salt to form a precipitate and a part of the solution is separated to control a ratio of an anion to a ferrous component to less than 1 and the ferrous component is oxidized to acicular goethite by bubbling air through the supernatant and precipitate.Type: GrantFiled: September 20, 1979Date of Patent: February 17, 1981Assignee: TDK Electronics, Co. Ltd.Inventors: Toshihiro Hamabata, Shinji Umeki
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Patent number: 4112184Abstract: A magnetic recording medium is prepared by depositing magnetic particles of ferromagnetic, acicular iron oxide upon whose surface is adsorbed cobalt hydroxide, on a supporting substrate.Type: GrantFiled: October 7, 1976Date of Patent: September 5, 1978Assignee: TDK Electronic CompanyInventors: Shinji Umeki, Tatsuo Uebori, Minoru Motegi
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Patent number: 4069367Abstract: A powder magnetic material for use as a magnetic recording medium and a method of its manufacture are disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electric resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, manganese, nickel, zinc and iron is deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3 to provide a powdered magnetic material of high coercivity, high magnetic flux density and low electric resistance.Type: GrantFiled: January 12, 1973Date of Patent: January 17, 1978Assignee: TDK Electronics Company, LimitedInventors: Shinji Umeki, Kazuhide Aue, Yasumichi Tokuoka
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Patent number: 4067755Abstract: A method of producing a powder magnetic material for use as a magnetic recording medium is disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electrical resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, maganese, nickel, zinc and iron are deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3. Powdered magnetic material of high coercivity, high magnetic flux density and low electrical resistance is obtained.Type: GrantFiled: September 23, 1975Date of Patent: January 10, 1978Assignee: TDK Electronics Company, Ltd.Inventors: Shinji Umeki, Kazuhide Aue, Yasumichi Tokuoka
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Patent number: 4010310Abstract: An improved magnetic powder characterized by high coercive force and high magnetic flux density which is formed by admixing a cobalt compound with a magnetic iron oxide, and adding to said admixture a complex forming agent which complexes with the cobalt compound to promote adsorption of cobalt onto the surface of the magnetic iron oxide.Type: GrantFiled: July 21, 1975Date of Patent: March 1, 1977Assignee: TDK Electronics Company, LimitedInventors: Yuichi Kubota, Shinji Umeki, Yasumichi Tokuoka
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Patent number: 3977985Abstract: A magnetic recording medium is disclosed as comprising powdered magnetic particles upon which there is deposited a ferro-magnetic metal or alloy such as cobalt or a cobalt alloy. Each magnetic particle is a spiculate magnetite and the deposite of cobalt or a cobalt alloy is in the range of 0.5 wt.% to 30 wt.%. The particles are heat treated in either a reducing or inert atmosphere to a sufficient temperature to improve the magnetic characteristics of the particles including their coercive force, Br/.rho. and Bm/.rho.. A layer of the recording medium is disposed on a support layer of polyester to form a magnetic tape.Type: GrantFiled: December 13, 1974Date of Patent: August 31, 1976Assignee: TDK Electronics Company, LimitedInventors: Shinji Umeki, Fujio Shibata, Kazuo Takada
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Patent number: 3958068Abstract: A process is disclosed for the production of powdered magnetic material for use in magnetic recording materials. The process comprises the steps of dispersing finely divided particles of a ferromagnetic oxide into an aqueous solution, dissolving therein salts of one or more ferromagnetic metals and a water soluble reducing agent, and then heating the dispersion while stirring to form and deposit a coating of the ferromagnetic metal (or alloy) on the surface of the finely divided particles of ferromagnetic oxide.Type: GrantFiled: May 30, 1972Date of Patent: May 18, 1976Assignee: TDK Electronics Company, LimitedInventors: Shinji Umeki, Fujio Shibata
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Patent number: 3953656Abstract: The magnetic recording medium having a magnetic recording layer containing magnetic iron oxide having a cobalt content of 0.5 - 10 wt.% and a ratio of Fe.sup.2.sup.+ /Fe.sup.3.sup.+ of 0.1 - 0.35; wherein the half-value width of the differential curve of the residual magnetization curve is less than 60% of the half-value width of the differential curve of the residual magnetization curve of non-treated magnetic recording layer.Type: GrantFiled: February 28, 1974Date of Patent: April 27, 1976Assignee: TDK Electronic CompanyInventors: Yasumichi Tokuoka, Shinji Umeki, Yuichi Kubota