Patents Assigned to Otsuka Kagaku Kabushiki Kaisha
  • Patent number: 7368123
    Abstract: According to the present invention, there is provided a pesticidal resin composition that contains (A) at least one resin selected from polyamide resins and polyacetal resins, (B) at least one compound selected from sulfone amide derivatives, sulfonic acid ester derivatives, phosphoric acid ester derivatives, phosphazene derivatives, carboxylic acid amide derivatives, carboxylic acid ester derivatives, and (C) a chemical agent having a pesticidal property. With the pesticidal resin composition containing the above ingredients, it is possible to obtain a pesticidal product that has such a strength, heat resistance and chemical resistance as to render the product usable as a structural member, as well as being capable of exhibiting the pesticidal activity for a prolonged period of time.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: May 6, 2008
    Assignees: Otsuka Kagaku Kabushiki Kaisha, NIX, Inc.
    Inventors: Akira Tabuchi, Kiyozumi Tani, Akiyoshi Inubushi, Atushi Kamada, Masaharu Kamei, Osamu Igarashi
  • Patent number: 7183421
    Abstract: The present invention provides a process for producing an oxide from an alcohol compound, the process comprising the steps of causing silica gel to carry the alcohol compound thereon and an oxidative catalyst thereon, and oxidizing the alcohol compound in the presence of an oxidizing agent, giving an oxide higher in oxidizing degree than the alcohol compound, and also provides a process for producing an oxide from an alcohol compound, the process comprising the steps of causing silica gel to carry the alcohol compound, and subjecting the alcohol compound to an electrolytic oxidation, giving an oxide higher in oxidizing degree than the alcohol compound.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: February 27, 2007
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Hideo Tanaka, Yutaka Kameyama
  • Patent number: 6887992
    Abstract: A 3-cephem derivative crystal which is a clathrate compound comprising p-methoxybenzyl ester of 7-phenylacetamide-3-formyl-3-cephem-4-carboxylic acid and dimethylformamide and a process for preparing the 3-cephem derivative crystal.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: May 3, 2005
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Takashi Moriyoshi, Yasuhiro Uosaki, Yutaka Kameyama, Daisuke Suzuki, Yoshiko Seo
  • Patent number: 6797750
    Abstract: The present invention has an object to provide a flame-retardant epoxy resin composition excellent in heat resistance and moisture resistance. A flame-retardant epoxy resin composition relating to the present invention contains an epoxy resin (A), a phosphazene compound (B), an epoxy hardener (C) and an inorganic filler (D), wherein the phosphazene compound (B) and the epoxy hardener (C) are included in the range of 0.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: September 28, 2004
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Masatoshi Taniguchi, Yuji Tada, Yoichi Nishioka
  • Patent number: 6797830
    Abstract: The present invention provides a process for producing an oxide from an alcohol compound, the process comprising the steps of causing silica gel to carry the alcohol compound thereon and an oxidative catalyst thereon, and oxidizing the alcohol compound in the presence of an oxidizing agent, giving an oxide higher in oxidizing degree than the alcohol compound, and also provides a process for producing an oxide from an alcohol compound, the process comprising the steps of causing silica gel to carry the alcohol compound, and subjecting the alcohol compound to an electrolytic oxidation, giving an oxide higher in oxidizing degree than the alcohol compound.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: September 28, 2004
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Hideo Tanaka, Yutaka Kameyama
  • Patent number: 6787192
    Abstract: A process for preparing a treated magnesium and/or magnesium alloy component comprising (A) treating the magnesium and/or magnesium alloy component with a surface treating agent containing a phosphate, (B) treating the component with a pre-treating agent used before a corrosion inhibition treatment, (C) treating the component, as required, with a cleaning agent containing surfactant and at least one compound selected from among aromatic carboxylic acids and salts thereof, and thereafter (D) treating the component further as required, with a corrosion inhibitor for magnesium.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: September 7, 2004
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Kazunori Fukumura, Koji Sakane
  • Patent number: 6713164
    Abstract: A printing sheet shaped from a resin containing 5 to 80 wt. % of a fibrous electrically conductive filler less than 100 &OHgr;·cm in volume resistivity, having 3 to 50 &mgr;m in average fiber length, 0.01 to 5 &mgr;m in average fiber diameter and 3 to 100 in aspect ratio and having a surface coated with an electrically conductive layer containing at least a tin oxide and an antimony oxide, or a printing sheet comprising a film substrate and a covering layer formed on at least one surface of the substrate and comprising a resin containing the above conductive filler.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: March 30, 2004
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Yukiya Hareyama, Hidetoshi Ogawa
  • Patent number: 6703438
    Abstract: An electroconductive plate-like titania containing at least 10% by weight of titanium nitride and at least 0.1% by weight of carbon component can provide electroconductive parts which are higher and more uniform in electroconductivity.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 9, 2004
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventor: Yukiya Hareyama
  • Patent number: 6632891
    Abstract: A flame-retardant resin composition comprising a phosphazene flame retardant and a polyester resin, wherein the flame retardant is bonded to the molecules of the polyester resin via the ester group thereof, can retain a high flame retardance for a prolonged term with little or no vaporization with time and is excellent in flame retardance, impact resistance, properties and processability.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: October 14, 2003
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Yuji Tada, Yoichi Nishioka, Tadao Yabuhara, Takashi Kameshima, Shinji Nakano
  • Patent number: 6576761
    Abstract: 1. A process for preparing a 3-alkenylcephem compound or 3-norcephem compound of the formula (3) characterized in that an alkenyl halide of the formula (2), a nickel catalyst, a metal up to −0.3 (V/SCE) in standard oxidation reduction potential and a compound of a metal having a higher standard oxidation reduction potential than the metal are caused to act on a 3-cephem compound of the formula (1) in a solvent wherein R1 is a hydrogen atom or the like, R2 is a hydrogen atom or the like, R3 is a hydrogen atom or carboxylic acid protective group, and X is a halogen atom or the like, R4—Y  (2) wherein R4 is 1-alkenyl having or not having a substituent, and Y is a halogen atom wherein R1, R2 and R3 are as defined above, and R5 is a hydrogen atom or 1-alkenyl having or not having a substituent.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: June 10, 2003
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Hideo Tanaka, Yutaka Kameyama
  • Patent number: 6569264
    Abstract: The present invention provides a corrosion inhibitor composition for magnesium or magnesium alloys which contains as an effective component, at least one compound selected from among aromatic carboxylic acids and salts thereof as an effective component. Further, the present invention provides a surface treating agent for magnesium and/or magnesium alloy components which contains a phosphate, at least one compound selected from among aromatic carboxylic acids and salts thereof, and further, as required, at least one compound selected from among pyrazole compounds and triazole compounds,and surface-treating method using the surface treating agent.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: May 27, 2003
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Kazunori Fukumura, Takahiko Shiraishi
  • Patent number: 6541111
    Abstract: The present invention provides a polycrystalline hexagonal boron nitride compound comprising fine crystals of the order of nanometers. The present invention also provides a hexagonal boron nitride characterized in that the boron nitride is 20 to 200 nm in mean particle size and comprises at least 80 wt. % of particles having sizes in the range of the mean particle size±30%. The present invention further provides a fine hexagonal boron nitride powder characterized in that the powder comprises particles in the form of circular disks or elliptical disks having a minor axis La, a major axis Lb and a thickness t which satisfy the following expressions. 50 nm≦La≦Lb≦400 nm 20 nm≦t≦150 nm t≦La 0.5≦La/Lb≦1.0.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: April 1, 2003
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Faustinus Fauzi, Masato Tani, Masayoshi Suzue
  • Patent number: 6523527
    Abstract: A tubular resin contains small animal repelling chemical. And canister structure installed in an automobile comprises the above tubular resin on the inner wall of an air inlet port portion of a drain pipe. The canister structure absorbs evaporated fuel from a fuel tank by a absorbent in a main body of a canister and then supplies desorbed fuel from the adsorbent together with the air sucked from the drain pipe to an engine side. The tubular resin prevents entering of a small animal into the drain pipe and also building of its nest.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: February 25, 2003
    Assignees: Nissan Motor Co., Ltd., Kabushiki Kaisha NIX, Otsuka Kagaku Kabushiki Kaisha, Earth Biochemical Co., Ltd.
    Inventors: Katsunori Ozaki, Tomiyuki Satoh, Michiaki Sasaki, Osamu Igarashi, Akira Tabuchi, Kiyozumi Tani, Atsushi Kamada, Masaharu Kamei
  • Patent number: 6448393
    Abstract: 3-Halogenomethylcephem compound of the formula (2) or its salt is obatined by deprotecting with phenol derivative a carboxylic acid protecting group at the 4-position of 7-amino-3-halogenomethylcephem compound of the formula (1) or its salt Further 3-thiomethylcephem compound of the formula (4) or its salt is prepared by reacting 3-halogenomethylcephem compound of the formula (2) or its salt with thiol compound or its salt of the formula (3) wherein X1, R1, R2 and M are as defined in the specification.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: September 10, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventor: Yutaka Kameyama
  • Patent number: 6433042
    Abstract: A curing agent for epoxy resin which comprises at least one selected from the compound of the formula (1) and its salt, as an effective component wherein X is —(CH2)n- or —(CH2)1-Y—(CH2)m- , Y is —N(R1)—, —O— or —S—, R1 is alkyl having 1 to 8 carbon atoms or amino. n is a number of 2, 3, 5 to 11, 1 and m are each a number of 1 to 8.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: August 13, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Yoshihisa Tomotaki, Takashi Kitajima, Keiichiro Ishikawa, Akihiro Nabeshima, Tomohiro Furuichi
  • Patent number: 6420554
    Abstract: A process for preparing a 3-cephem compound represented by the formula (3), the process comprising the steps of reacting a &bgr;-lactam compound represented by the formula (1) with a phosphorus halide compound in the presence of an organic base to give an imino-&bgr;-lactam compound represented by the formula (2), adding a phenol to the same reaction system to cause decomposition due to reaction with an alcohol and simultaneously to remove the protection of carboxylic acid ester, giving a 3-cephem compound represented by the formula (3) or a salt thereof where R1, R2, R3 and X are as defined above.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: July 16, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Yutaka Kameyama, Takae Yamada, Dal Soo Suh
  • Patent number: 6417351
    Abstract: A process for preparing 3-alkenylcephem compounds characterized in that 3-alkenylcephem compound of the formula (3) is prepared in a single step by simultaneously conducting reactions of a 3-chloromethylcephem compound of the formula (1) with iodization reagent, alkali metal hydroxide or carbonate, arylphosphine and an aldehyde of the formula (2)  R4—CHO  (2) wherein R1, R2, R3 and R4 are as defined in the specification.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: July 9, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventor: Yutaka Kameyama
  • Patent number: 6403789
    Abstract: A halogenating agent of the formula (1) and a method of halogenating hydroxyl group wherein R1 and R2 are the same or different and are each ethyl, propyl, isopropyl, butyl, isobutyl or allyl; X is chlorine atom or bromine atom; and Y is chlorine ion, bromine ion, dichlorophosphate ion, dibromophosphate ion, chlorosulfonate ion, bromosulfonate ion, chlorooxalate ion or bromooxalate ion.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: June 11, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Daisuke Suzuki, Ryo Kikuchi, Masaru Yasui
  • Patent number: 6399770
    Abstract: A process for preparing a &bgr;-hydroxyester comprising reducing a &bgr;-keto ester in the presence of a salt of ammonium borohydride.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: June 4, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventor: Yutaka Kameyama
  • Patent number: 6372825
    Abstract: The present invention provides an aqueous solution of an epoxy resin and a solid thereof, which is obtained by the following manner that an epoxy compound or a solution of the epoxy compound in organic solvent, and an amine compound of the formula (1), an aqueous solution thereof, a solution of the amine compound in organic solvent, or a solution thereof in a mixture of water and organic solvent, are mixed together so that the epoxy compound and the amine compound are reacted or polymerized to obtain a solution of an epoxy resin, to which water is added and heated to remove the organic solvent and unreacted amine compound, and a process for preparing the same NH2N(R1)(R2)  (1) wherein R1 and R2 are the same or different and each is alkyl having 1 to 6 carbon atoms, alkylene having 2 to 11 carbon atoms or a group represented by —R3—N(R4)—R5— which are formed when both are bonded, R3 and R5 are the same or different and each is alkylene having 1 to 6 carbon atoms, and R4 is a
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: April 16, 2002
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Yoshihisa Tomotaki, Takashi Kitajima, Keiichiro Ishikawa, Akihiro Nabeshima, Tomohiro Furuichi