Patents by Inventor Takao Hayashi

Takao Hayashi 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: 5273822
    Abstract: A fibrous electrically-conductive filler comprises fibrous aluminum borate as a core material and a layer of a electrically-conductive substance which covers the core material or comprises fibrous aluminum borate as a core material, a layer of titanium oxide which covers the fibrous aluminum borate and a layer of a electrically-conductive substance which covers the titanium oxide layer. The fibrous electrically-conductive filler can be prepared by a process comprising the step of directly forming a layer of a electrically-conductive substance doped with antimony or fluorine on the surface of fibrous aluminum borate, or the steps of forming, on the surface of the fibrous aluminum borate, an intermediate layer of titanium oxide in an amount ranging from 2 to 50% by weight on the basis of the weight of the fibrous aluminum borate and then forming a layer of a electrically-conductive substance doped with antimony or fluorine on the surface of fibrous aluminum borate.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: December 28, 1993
    Assignees: Mitsui Mining & Smelting Co., Ltd., Metallgesellschaft Aktiengesellschaft
    Inventors: Takao Hayashi, Norihiro Sato, Chikara Omotani, Manabu Hosoi, Nobuyoshi Kasahara, Wolf-Dieter Griebler, Jorg Hocken, Gunther Rudolph
  • Patent number: 5178909
    Abstract: Silver-coated copper-based powders are prepared by the steps of dispersing copper powders in a chelating agent solution, adding a silver ion solution to the resulting dispersion to effect a substitution type of deposition reaction and, then, adding a reducing agent to the resulting solution to effect a reduction type of deposition reaction, thereby forming silver coats on the surfaces of the copper powders, wherein the chelating agent solution is prepared in two portions, a first portion thereof being prepared before the addition of the silver ion solution and a second portion thereof being added during the addition of the reducing agent, or in three portions, a first portion thereof being prepared before the addition of the silver ion solution, a second portion thereof being added during the addition of the reducing agent and a third portion thereof being added at the time of the completion of the reaction.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: January 12, 1993
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventor: Takao Hayashi
  • Patent number: 5171364
    Abstract: A process for preparing a conductive, acicular zinc oxide, comprising the steps of: preparing a zinc oxide slurry comprising an acicular zinc oxide, a salt of at least one metal selected from the group consisting of aluminum, gallium, indium and tin and an aqueous solution of an alkali metal hydroxide and having a pH value maintained at 10 to 13, adjusting the pH value of said zinc oxide slurry to 5 to 9 while stirring, aging the slurry, separating the zinc oxide present in the slurry by filtration, washing and drying the separated zinc oxide, and then firing the dried zinc oxide at 500.degree. to 700.degree. C. in a reducing atmosphere.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: December 15, 1992
    Assignees: Mitsui Mining & Smelting Co. Ltd., Metallgesellschaft Aktiengesellschaft
    Inventors: Norihiro Sato, Takao Hayashi, Nobuyoshi Kasahara, Wolf-Dieter Griebler, Jorg Hocken, Gunther Rudolph
  • Patent number: 5140593
    Abstract: Disclosed is a method of checking a test program in a duplex processing apparatus including two processors connected to each other through a failure acknowledge line and an interprocessor communication line and constituting an active system and a standby system, main memories connected to the two processors through buses, respectively, a queue connected to the buses which connect the processors to the main memories, and bus arbitors for controlling contention of a bus occupy right on the buses. In this method, normality of the test program is checked from an execution address of the test program executed by the standby processor under the control of the active processor.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 18, 1992
    Assignee: NEC Corporation
    Inventor: Takao Hayashi
  • Patent number: 5131952
    Abstract: An electrically conductive powder is provided which comprises particles of zinc sulfide coated with an elecctrically conductive coating of copper sulfide wherein the zinc sulfide particles have a BET surface area of 2 to 10 m.sup.2 /g and a purity of at least 97%, and is particularly useful to impart antistatic properties to plastics, synthetic fibers, laminated papers and the like.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: July 21, 1992
    Assignees: Metallgesellschaft Aktiengesellschaft, Mitsui Mining & Smelting Co., Ltd.
    Inventors: Takao Hayashi, Norihiro Sato, Manabu Hosoi, Nobuyoshi Kasahara, Clemens Aderhold, Wolf-Dieter Griebler, Jorg Hocken, Uwe Rosin, Gunther Rudolph
  • Patent number: 5114667
    Abstract: A high temperature reactor has a downflow type nuclear reactor provided at the top portion thereof with a gas inlet and a plurality of steam generators provided around the nuclear reactor. The steam generator has a heat insulation tube provided vertically from the bottom portion of the nuclear reactor to a level higher than the top gas inlet of the reactor, a heat exchanger provided in a descending gas flow path formed around the heat insulation tube, and a gas circulator provided at the bottom portion thereof for feeding a gas coolant to the gas inlet of the nuclear reactor, whereby said gas coolant, after being used for cooling the reactor core, delivered from the bottom portion of the reactor, flows into the heat insulation tube, flows upward to the top portion of the tube, is reversed in direction at the top end of the tube, then flows downward through the descending gas flow where the heat exchanger is provided, and is then recycled to the gas inlet flow path of the reactor by the gas circulator.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: May 19, 1992
    Assignees: The Japan Atomic Power Company, Babcock-Hitachi Kabushiki Kaisha
    Inventors: Takao Hayashi, Yasuo Osawa
  • Patent number: 5102650
    Abstract: Needle-like electrically conductive zinc oxide filler having low specific volume resistance and excellent electrical conductivity-imparting effect per unit weight thereof is provided, including a method for its preparation.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: April 7, 1992
    Assignees: Metallgesellschaft Aktiengesellschaft, Mitsui Mining & Smelting Co., Ltd.
    Inventors: Takao Hayashi, Norihiro Sato, Chikara Omotani, Manabu Hosoi, Nobuyoshi Kasahara, Gunther Rudolph, Wolf-Dieter Griebler, Jorg Hocken
  • Patent number: 5079279
    Abstract: A reaction curable resin composition comprising a curable component, a polymerization initiator for curing the curable component, an inorganic filler and a phosphoric acid ester of methacrylic or acrylic acid having the formula: ##STR1## wherein R is H or CH.sub.3, and n is 1 or 2, wherein the curable component comprises at least one monomer (A-1) selected from the group consisting of a polyfunctional allylcarbonate, an unsaturated polyester and (meth)acrylate, and/or a precondensate (A-2) obtained by partially polymerizing such monomer (A-1).
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: January 7, 1992
    Assignee: Asahi Glass Company Ltd.
    Inventors: Takao Hayashi, Kazuhiko Kameda
  • Patent number: 5017333
    Abstract: A multi-region reactor core pebble bed high temperature gas reactor comprises a pebble bed reactor core housed within a pressure vessel and charged with spherical fuel. The reactor core is surrounded by a reflector wall comprising a partition wall which partitions the reactor core into a plurality of reactor core sub-regions. The reflector wall comprises a plurality of layers of reflector blocks, adjacent blocks of a layer being secured against one another by removable tapered keys wedged therein between.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: May 21, 1991
    Assignees: Japan Atomic Power Co., Ltd., Fuji Electric Co., Ltd.
    Inventors: Takao Hayashi, Masao Yamada
  • Patent number: 4975508
    Abstract: An acrylic copolymer elastomer is disclosed, comprising (A) from 94.5 to 50% by weight of ethyl arcylate or ethyl arcylate containing not more than 50% by weight of n-butyl acrylate, (B) from 5 to 50% by weight of an arcylic acid ester and/or a methacrylic acid ester represented by formula (I): ##STR1## wherein the symbols are as defined in the appended claims, and (C) from 0.5 to 10% by weight of at least one of allyl glycidyl ether and glycidyl methacrylate, or vinyl chloroacetate, and having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of at least 10. This is a novel copolymer elastomer which is excellent in fuel resistance and low-temperature resistance.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: December 4, 1990
    Assignee: Tosoh Corporation
    Inventors: Mitsuhiro Kamezawa, Takao Hayashi
  • Patent number: 4916172
    Abstract: A reaction curable composition comprising a curable component, a polymerization initiator for curing the curable component and from 30 to 90% by weight, based on the total composition, of inorganic fillers, wherein the curable component is a combination of a polyfunctional allylcarbonate monomer or its precondensate, an unsaturated polyester and a reactive diluent, or a combination of a partially cured product of at least two of such three components and the rest of such three components, if any.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: April 10, 1990
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Takao Hayashi, Kazuhiko Kameda
  • Patent number: 4903834
    Abstract: A package for diazo thermosensitive recording materials coiled round a core, which comprises a packaging paper being a water vapor permeability of more than 50 g/m.sup.2.24 hours and comprising a light-reflecting paper layer located as outer layer and a light-shielding paper layer located as inner layer.In the package of the invention, the packaging paper shields the recording material from the external heat and light. When internal humidity is increased such as by heating of the package such as higher than 50.degree. C., moisture passes through the packaging paper to the outside. Accordingly, fogging by precoupling of the packaged diazo thermosensitive recording materials, irrespective of the fixation type or not, is remarkably decreased, and the quality of the recording material can be maintained for a long period during storage.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: February 27, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Kotaro Nakamura, Takao Hayashi
  • Patent number: 4776883
    Abstract: According to the present invention, hydrazine or a hydrazine compound is added to an acidic solution containing silver and palladium as ions to thereby reduce-separate silver-palladium alloy fine powders having an average particle diameter of 0.01-1.0 micron. The powders may be heat-treated at 100.degree.-500.degree. C. in an inert atmosphere or vacuum to thereby obtain silver-palladium alloy fine powders that have an average particle diameter of 0.01-1.0 micron and are usable in the manufacture of ceramic capacitors.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: October 11, 1988
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Takao Hayashi, Akio Ushijima, Yoshinobu Nakamura
  • Patent number: 4766303
    Abstract: An optical information system includes an optical source emitting light. An information recording member is exposed to the emitted light. A beam splitter disposed between the light emitting source and the information recording member separates light reflected by the information recording member and light traveling from the light emitting source to the information recording member. A device detects intensity of the separated reflected light. A birefringence plate is movably disposed between the light emitting source and the information recording member. The birefringence plate is moved in accordance with the detected intensity of the separated reflected light.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: August 23, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keiichi Yoshizumi, Akira Matsubara, Takao Hayashi
  • Patent number: 4600811
    Abstract: In a subscriber line interface circuit of a telephone switching system, a differential amplifier (1) is coupled through the line terminals (T, R) of a two-wire subscriber line for detecting a voltage difference developed thereacross. First and second resistances (8, 9) of equal values are coupled at their first ends to the line terminals, respectively. Tip and ring drivers (2, 3) are connected to the other end of first and second resistances for driving the load impedance of the subscriber line. First, second and third feedback loops (f.sub.1, f.sub.2, f.sub.3) are provided, the first feedback loop being coupled from an output of differential amplifier (1) to the input of the drivers (2, 3) vary the impedance characteristics of the first and second resistances (8, 9) so that a high impedance is synthesized across each of the first and second resistances.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: July 15, 1986
    Assignee: NEC Corporation
    Inventors: Takao Hayashi, Masanobu Arai, Takashi Shinozuka
  • Patent number: 4504401
    Abstract: A stainproofing agent containing as an active ingredient a polyfluoroalkyl group-containing compound represented by the following general formula and having a molecular weight of from 800 to 3000:(R.sub.f -X-A-CONH).sub.a W-NHCO-A'-Z).sub.3-awhere R.sub.f is a polyfluoroalkyl group having from 1 to 20 carbon atoms, X is --R--, --CON(R.sup.1)--Q-- or --SO.sub.2 N(R.sup.1)--Q-- (where R is a divalent alkylene group, R.sup.1 is a hydrogen atom or a lower alkyl group and Q is a divalent organic group), each of A and A' is --O--, --S-- or --N(Z')-- (where Z' is a hydrogen atom or a monovalent organic group), Z is a monovalent organic group, W is a trivalent organic group, a is an integer of 1, 2 or 3. A process for the stainproofing agent is also disclosed.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: March 12, 1985
    Assignee: Asahi Glass Company Ltd.
    Inventors: Masashi Matsuo, Katsuji Itoh, Takao Hayashi, Yoshio Oda
  • Patent number: 4374671
    Abstract: A color developer containing a combination of zinc oxide, at least one salicylic acid or nuclear substituted salicylic acid, and at least one metal silicate as an inorganic pigment, and a recording unit having a layer of the color developer. The color developer has a high developing ability and is capable of forming a distinct color having a high light resistance when it is contacted with a color former.
    Type: Grant
    Filed: March 13, 1980
    Date of Patent: February 22, 1983
    Inventors: Takao Hayashi, Hajime Kato, Akio Miyamoto, Makoto Yoshida
  • Patent number: 4367097
    Abstract: This invention relates to a method for manufacturing a granular organic rubber composition which is useful for a vulcanizing agent, a vulcanization accelerator and antioxidant etc. by contacting an organic rubber chemical mixture comprising a rubber chemical, a liquid polybutene, a nonionic or anionic surface active agent and a water-soluble anionic macromolecule with an aqueous solution containing an alkaline earth metal salt and/or a zinc salt.
    Type: Grant
    Filed: August 20, 1981
    Date of Patent: January 4, 1983
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Yasuhiro Sakanaka, Takao Hayashi, Tatsuya Koizumi, Sumio Akashi
  • Patent number: 4194999
    Abstract: A powdery rubber is produced by mixing an anionic or nonionic rubber latex with an aqueous solution of an anionic water soluble macro-molecular compound which is dissociated in water to give negative charge; adjusting the pH to an acidic condition; adding to the aqueous solution either a cationic polymer which is water soluble in an acidic condition or a cationic surfactant which causes a coacervation with the anionic water soluble macromolecular compound in an acidic condition to separate the rubber particles from the rubber latex under coacervation and adding an emulsion of a synthetic resin having a glass transition temperature higher than 30.degree. C. to the rubber particles at a ratio of 1 to 50 wt.% (as a solid content) to the solid content of the rubber latex and dehydrating and drying the resulting powdery rubber.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: March 25, 1980
    Assignee: Toyo Soda Manufacturing Company, Ltd.
    Inventors: Takao Hayashi, Yasuhiro Sakanaka, Akihiko Shimizu
  • Patent number: 4159208
    Abstract: A process for the production of a color developer comprising reacting an alkali metal salt of an aromatic carboxylic acid and a water-soluble metal salt in the presence of clay and a water-insoluble aluminum compound.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: June 26, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takao Hayashi, Hajime Kato