Patents by Inventor Minoru Kakuda
Minoru Kakuda 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: 7078562Abstract: The adamantane derivatives of the present invention which are represented by the general formula (1): wherein X is a hydrogen atom, alkyl, halogen-containing alkyl, halogen, or hydroxyl-, halogen-, nitrile- or ether-containing hydrocarbyl, and a plurality of X groups, if any, may be the same or different from each other; n1 is an integer of 1 to 14; R1 to R4 may be the same or different from each other and are independently alkyl or halogen-containing alkyl; and Y1 and Y2 may be the same or different from each other and are independently a hydrogen atom or a group represented by the general formula (2): wherein R5 to R7 may be the same or different from each other and are independently a hydrogen atom, alkyl, halogen or halogen-containing alkyl, are excellent in optical properties, heat resistance and acid-dissociating property, and useful as crosslinking-type resins, optical materials such as optical fibers, light wave guides, optical disk substrates and photoresists as well as raw materials thereofType: GrantFiled: January 11, 2005Date of Patent: July 18, 2006Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kikuo Furukawa, Minoru Kakuda, Yoshio Nishimura, Toshiaki Yamada
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Patent number: 7067692Abstract: In the present invention, an adamantyl acrylate compound is produced by a process comprising a first step and a second step without using acid halide. In the first step, a 2-adamantanone compound is reacted with a hydrocarbyl halide in the presence of lithium metal to form an adamantanolate intermediate that is then reacted with an acrylic ester compound in the second step to produce the aimed adamantyl acrylate compound.Type: GrantFiled: April 16, 2004Date of Patent: June 27, 2006Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kikuo Furukawa, Minoru Kakuda, Yoshio Nishimura, Takehiko Isobe, Mitsuharu Suzuki
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Publication number: 20060127862Abstract: It is a major object of the present invention to reduce the time required for bleaching discolored teeth by using a photocatalyst to thereby provide a bleaching material which is simple to use. The present invention relates to a bleaching material for bleaching teeth by applying a solution or paste comprising BiVO4 photocatalyst and a compound which generates hydrogen peroxide in an aqueous solution onto the surface of discolored teeth, and irradiating the surface with light, thereby bleaching the teeth by resultant photocatalytic action. The present invention provides a bleaching material for discolored teeth comprising as active ingredients BiVO4 photocatalyst and a compound which generates hydrogen peroxide in an aqueous solution; and a method of bleaching discolored teeth using the above material.Type: ApplicationFiled: December 8, 2005Publication date: June 15, 2006Inventors: Minoru Kakuda, Hiroshi Kurata
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Publication number: 20050158662Abstract: The adamantane derivatives of the present invention which are represented by the general formula (1): wherein X is a hydrogen atom, alkyl, halogen-containing alkyl, halogen, or hydroxyl-, halogen-, nitrile- or ether-containing hydrocarbyl, and a plurality of X groups, if any, may be the same or different from each other; n1 is an integer of 1 to 14; R1 to R4 may be the same or different from each other and are independently alkyl or halogen-containing alkyl; and Y1 and Y2 may be the same or different from each other and are independently a hydrogen atom or a group represented by the general formula (2): wherein R5 to R7 may be the same or different from each other and are independently a hydrogen atom, alkyl, halogen or halogen-containing alkyl, are excellent in optical properties, heat resistance and acid-dissociating property, and useful as crosslinking-type resins, optical materials such as optical fibers, light wave guides, optical disk substrates and photoresists as well as raw materials thereofType: ApplicationFiled: January 11, 2005Publication date: July 21, 2005Inventors: Kikuo Furukawa, Minoru Kakuda, Yoshio Nishimura, Toshiaki Yamada
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Patent number: 6843981Abstract: The bleaching compositions of discolored teeth comprise titanium dioxide initiating photocatalyst action with light irradiation, chemical compounds generating hydrogen peroxide in an aqueous solution and thickening agents. Further the bleaching methods of discolored teeth comprising applying the bleaching composition onto the surface area of the teeth and then initiating photocatalyst action by irradiating the applied surfaces area with light. Therefore, the present invention shows remarkable bleaching results due to easy application of the compositions onto discolored teeth and keeping the original activity of the photocatalyst without its deterioration.Type: GrantFiled: July 3, 2000Date of Patent: January 18, 2005Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Takuro Ishibashi, Emi Higashiizumi, Ryuji Sotoaka, Fukusaburo Ishihara, Minoru Kakuda, Masumi Ogasawara, Kouzo Ishibashi
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Publication number: 20040210082Abstract: In the present invention, an adamantyl acrylate compound is produced by a process comprising a first step and a second step without using acid halide. In the first step, a 2-adamantanone compound is reacted with a hydrocarbyl halide in the presence of lithium metal to form an adamantanolate intermediate that is then reacted with an acrylic ester compound in the second step to produce the aimed adamantyl acrylate compound.Type: ApplicationFiled: April 16, 2004Publication date: October 21, 2004Inventors: Kikuo Furukawa, Minoru Kakuda, Yoshio Nishimura, Takehiko Isobe, Mitsuharu Suzuki
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Patent number: 6570042Abstract: Adamantanediols are produced by the hydroxylation of adamantane compounds in a water/organic solvent two-phase system in the presence of a ruthenium compound and a hypochlorite. Throughout the hydroxylation, the hypochlorite concentration in the water phase is regulated within a narrow limited range, for example, by monitoring the pH of the reaction system. With such a control of the hypochlorite concentration, the adamantanediols are produced in a high selectivity and a high yield.Type: GrantFiled: September 19, 2001Date of Patent: May 27, 2003Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Minoru Kakuda, Takashi Onozawa, Hiroshi Kurata, Kikuo Furukawa
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Patent number: 6521781Abstract: A 2-hydrocarbyl-2-adamantyl acrylate compound represented by the following Formula 6: is produced easily and stably with high yields by reacting a 2-adamantanone compound represented by the following Formula 1: with at least one organometallic compound represented by the following Formula 2 or 3: R1MgX (2) R1Li (3) and at least one acrylic compound represented by the following Formula 4 or 5: wherein, R1, R2, R3, X, Y and n in the above formulae being as defined in the disclosure.Type: GrantFiled: December 6, 2001Date of Patent: February 18, 2003Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Minoru Kakuda, Yoshihisa Arai, Kikuo Furukawa, Takehiko Isobe
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Publication number: 20020077499Abstract: A 2-hydrocarbyl-2-adamantyl acrylate compound represented by the following Formula 6: 1Type: ApplicationFiled: December 6, 2001Publication date: June 20, 2002Inventors: Minoru Kakuda, Yoshihisa Arai, Kikuo Furukawa, Takehiko Isobe
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Publication number: 20020040170Abstract: Adamantanediols are produced by the hydroxylation of adamantane compounds in a water/organic solvent two-phase system in the presence of a ruthenium compound and a hypochlorite. Throughout the hydroxylation, the hypochlorite concentration in the water phase is regulated within a narrow limited range, for example, by monitoring the pH of the reaction system. With such a control of the hypochlorite concentration, the adamantanediols are produced in a high selectivity and a high yield.Type: ApplicationFiled: September 19, 2001Publication date: April 4, 2002Applicant: Mitsubishi Gas Chemical Company, Inc.Inventors: Minoru Kakuda, Takashi Onozawa, Hiroshi Kurata, Kikuo Furukawa
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Patent number: 6333438Abstract: A process for efficiently separating and recovering a ruthenium compound used as the catalyst in the production of adamantanols. The adamantanols are produced by hydroxylating an adamantane compound in the presence of a ruthenium compound and a salt of hypochlorous acid in a water/organic solvent two-phase system. The hydroxylation product liquid is added with an oxidizing agent to allow the ruthenium compound to be extracted into the organic phase. The ruthenium compound is separated and recovered from the organic phase. Alternatively, the ruthenium compound is back-extracted into the aqueous phase by adding an aqueous alkali solution to the organic phase. Then, the ruthenium compound is separated and recovered from the aqueous phase.Type: GrantFiled: July 14, 2000Date of Patent: December 25, 2001Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Minoru Kakuda, Takanobu Okamoto, Takashi Onozawa, Hiroshi Kurata
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Patent number: 6248226Abstract: In producing deionized water by electrodeionization according to the present invention, feed water and concentrating water are flowed into the ion depletion compartments and the concentration compartments, respectively, in such a way that the current direction of feed water being fed into the ion depletion compartments is opposite to the current direction of concentrating water being fed into the concentration compartments. Further, feed water flowed into each ion depletion compartment is first passed through an anion exchange material layer, and subsequently passed through other ion exchange material layer(s). The migration of anions into the concentration compartments is promoted in the portions of such anion exchange material layers through which feed water is first passed. As a result, the silica removal rate is improved.Type: GrantFiled: February 23, 1999Date of Patent: June 19, 2001Assignee: Organo CorporationInventors: Yasutaka Shinmei, Minoru Kakuda
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Patent number: 6187967Abstract: Adamantanols are produced in high selectivity and high yields by hydroxylation of adamantane compounds in a specific two-phase solvent system of water and an organic solvent in the presence of a ruthenium compound and hypochlorous acid or its salt. Adamantanediols transfer into the organic phase by adding a specific alcohol to a reaction liquid containing the adamantanols, thereby facilitating extraction of the adamantanediols. The ruthenium compound transfers into the water phase by treating the reaction liquid with alkali prior to the addition of the alcohol and precipitates therein, thereby facilitating the recovery of the ruthenium compound.Type: GrantFiled: January 28, 2000Date of Patent: February 13, 2001Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Minoru Kakuda, Takanobu Okamoto, Takashi Onozawa, Hiroshi Kurata
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Patent number: 5202127Abstract: An insect-proofing agent comprising 1,3,5-trioxane as an active ingredient is disclosed. This insect-proofing agent has a high insect-proofing action and gives no irritating odor, and the insect-proofing agent is not toxic to human bodies and has a high safety. Furthermore, this insect-proofing agent causes no discoloration in metallic substance such as silver thread, gold threads and spangles used for clothing decoration. This insect-proofing agent is effectively applied in the form of a solid preparation, an aqueous solution or an organic solvent solution.Type: GrantFiled: December 30, 1991Date of Patent: April 13, 1993Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Mutsuhiko Takeda, Minoru Kakuda, Masafumi Shimpo
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Patent number: 5094846Abstract: By incorporating a liquid or solid silicone or paraffin into 1,3,5-trioxane, agglomeration of trioxane particles and adhesion of the trioxane to a machine wall or the like can be prevented. The silicone or paraffin is used in an amount of 0.003 to 1% by weight.Type: GrantFiled: July 19, 1990Date of Patent: March 10, 1992Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Mutsuhiko Takeda, Minoru Kakuda, Masafumi Shimpo, Kiyoshi Yoshida
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Patent number: 5071870Abstract: Disclosed is a composition comprising trioxane and an assistant aiding in the insect-proofing action of trioxane or controlling its vapor pressure.Type: GrantFiled: April 26, 1989Date of Patent: December 10, 1991Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Mutsuhiko Takeda, Minoru Kakuda, Kiyoshi Yoshida, Toshie Takahashi, Masafumi Shimpo
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Patent number: 5043351Abstract: Disclosed is a hygroscopic insect-proofing composition, and more particularly a trioxane-containing composition which is useful in insect-proofing and damp proofing of clothing.Type: GrantFiled: April 27, 1989Date of Patent: August 27, 1991Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Mutsuhiko Takeda, Minoru Kakuda, Masafumi Shimpo, Kiyoshi Yoshida
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Patent number: 5026875Abstract: Disclosed is a composition comprising 1,3,5-trioxane, and more particularly a stability-improved trioxane composition.Type: GrantFiled: April 27, 1989Date of Patent: June 25, 1991Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Mutsuhiko Takeda, Minoru Kakuda, Masafumi Shimpo, Kiyoshi Yoshida
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Patent number: 4476314Abstract: A process for producing olefin oxides comprising epoxidizing olefins with hydrogen peroxide in the presence of an inorganic or organic antimony compound or organotin compound as a catalyst is disclosed.Type: GrantFiled: September 7, 1982Date of Patent: October 9, 1984Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Yasuhisa Kuriyama, Minoru Kakuda, Shoichi Nitoh
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Patent number: 4473708Abstract: A process for preparing a ketazine useful as an intermediate for the synthesis of hydrazine is disclosed. The process comprises reacting an aliphatic or aromatic ketone with ammonia and hydrogen peroxide in the presence of a catalyst of an arsenic compound to produce a corresponding ketazine.Type: GrantFiled: July 9, 1982Date of Patent: September 25, 1984Assignee: Mitsubishi Gas Chemical Company Inc.Inventors: Yasuhisa Kuriyama, Minoru Kakuda, Shoichi Nitoh