Patents by Inventor Mikio Sato

Mikio Sato 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: 4600527
    Abstract: A liquid crystal composition containing azo dyes represented by the formula (I.sub.0) ##STR1## wherein X represents ##STR2## A.sup.1 represents --O-- or --NH--, R.sup.1 represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, an aryloxyalkyl group, a dialkylaminoalkyl group, an arylaminoalkyl group, a cycloalkyl group, an alkoxy group, an alkoxyalkoxy group, an arylalkoxy group, an aryl group, a halogen atom or a group of ##STR3## D.sup.1 and D.sup.2 each represents an aromatic group which does not contain an ionic group; U.sup.1 and U.sup.2 each represents a hydrogen atom, a halogen atom, a methyl group, a methoxy group or an ethoxy group;Y.sup.1 represents --O-- or ##STR4## R represents a hydrogen atom, an alkyl group or may be connected to Z.sup.10 to Z.sup.12 to form a ring;Z.sup.4 to Z.sup.12 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, an acylamino group or a cyano group, or Z.sup.4 and Z.sup.5, Z.sup.7 and Z.sup.8, and Z.sup.10 and Z.sup.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: July 15, 1986
    Assignees: Mitsubishi Chemical Industries, Hitachi Ltd.
    Inventors: Shuji Imazeki, Akio Mukoh, Mikio Sato, Masaharu Kaneko, Tomio Yoneyama, Junko Iwanami
  • Patent number: 4588517
    Abstract: The description is concerned with a liquid crystal composition of the guest-host type which contains a pleochroic dye dissolved therein. The dye molecule has an end group or end groups in the molecule represented by the general formula: ##STR1## where Ro designates a straight chain of alkyl group, in which methylene group not adjacent to the nitrogen atom may be substituted by oxygen atom or sulfer atom; R1 designates an alkyl group having a chain length different from that of the alkyl group of Ro or a group ##STR2## in R1 a methylene group not adjacent to the nitrogen atom may be substituted by oxygen atom or sulfur atom, and R2 designates hydrogen atom, alkyl group, alkoxy group, cycloalkyl group or dialkylamino group.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: May 13, 1986
    Assignees: Hitachi, Ltd., Mitsubishi Chemical Industries, Ltd.
    Inventors: Masaharu Kaneko, Tomio Yoneyama, Junko Iwanami, Shuji Imazeki, Akio Mukoh, Mikio Sato
  • Patent number: 4584120
    Abstract: The liquid crystal compound of this invention is characterized by having the general formula.
    Type: Grant
    Filed: May 15, 1984
    Date of Patent: April 22, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Tsunenori Fujii, Kenji Suzuki, Masahiro Yoshida, Hisashi Okawa, Kaoru Koto, Hideki Ohmori, Hisao Yokokura, Yoshiaki Okabe, Shintaroo Hattori, Teruo Kitamura, Akio Mukoh, Mikio Sato
  • Patent number: 4564694
    Abstract: A colorless liquid crystalline compound having at least one 6-membered ring and non-cyclic end groups in the molecular skelton, said 6-membered containing two or more carbon atoms, at least one of which is directly bonded to a methylene group of a non-cyclic group having an alkoxy group at another end has a wide mesomorphic range. When said colorless liquid crystalline compound is mixed with a liquid crystal composition, the resulting mixture also has an enlarge mesomorphic range and in almost all cases has a reduced viscosity.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: January 14, 1986
    Assignees: Hitachi, Ltd., Kanto Chemical Co., Inc.
    Inventors: Yoichi Hirai, Tsunenori Fujii, Kaoru Koto, Kenji Suzuki, Masahiro Yoshida, Hisashi Okawa, Yoshiaki Okabe, Teruo Kitamura, Hisao Yokokura, Shintaroo Hattori, Akio Mukoh, Mikio Sato
  • Patent number: 4562322
    Abstract: A SF.sub.6 gas insulating electric apparatus usable as a circuit breaker, etc., containing a SF.sub.6 gas insulator and a resin insulator, both of which insulators are present in an atmosphere to be exposed to arcs, characterized by making at least the surface portion to be exposed to arcs of the resin insulator from a polymer containing nitrogen atoms or a polyolefin resin, and if necessary together with an inorganic filler powder, is excellent in both surface and inner arc resistance and can maintain breaking performance for a long period of time.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: December 31, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Motoo Yamaguchi, Isamu Sone, Kunio Hirasawa, Yoshio Yoshioka, Akio Nishikawa, Hiroshi Suzuki, Mikio Sato, Masao Hosokawa
  • Patent number: 4539125
    Abstract: Water-based metal-working fluid which contains a compound represented by the general forumla (I) ##STR1## or further contains at least one compound selected from the group consisting of the compounds represented by the general formulae (II), (III) and (IV). ##STR2## Metal-working fluid of the present invention has a superior spoilage-inhibiting effect.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: September 3, 1985
    Assignee: Idemitsu Kosan Company
    Inventor: Mikio Sato
  • Patent number: 4528113
    Abstract: An anthraquinone dye and a liquid crystal composition containing the dye are disclosed.The liquid crystal composition is preferably used in an electro-optic cell which enables a good color display utilizing the guest-host effect of the liquid crystal.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: July 9, 1985
    Assignees: Mitsubishi Chemical Industries Limited, Hitachi Limited
    Inventors: Shuji Imazeki, Akio Mukoh, Mikio Sato, Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama
  • Patent number: 4507221
    Abstract: An anthraquinone dye and a liquid crystal composition containing the same are disclosed. The anthraquinone dye shows a cyan color and has excellent order parameter, solubility and stability. The liquid crystal composition is particularly used in an electro-optic cell, which is interposed between two facing electrode plates and permits the realization of good color displays utilizing the guest-host effect of a liquid crystal.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: March 26, 1985
    Assignees: Mitsubishi Chemical Industries Limited, Hitachi, Ltd.
    Inventors: Shuji Imazeki, Akio Mukoo, Mikio Sato, Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama
  • Patent number: 4494217
    Abstract: In a semiconductor memory device comprising semiconductor memory elements having such a degree of integration in memory circuits as to produce soft errors by incident .alpha.-rays derived from a packaging material and a package which packages the memory elements and is made from the packaging material, when an .alpha.-rays shielding layer made from a resinous material, which may contain one or more high-purity fillers, containing a total amount of 1 part per billion or less of uranium and thorium is interposed between the memory elements and the package, the generation of soft errors is reduced remarkably.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: January 15, 1985
    Assignees: Hitachi, Ltd., Hitachi Chemical Company, Ltd.
    Inventors: Hiroshi Suzuki, Goro Tanaka, Akio Nishikawa, Junji Mukai, Mikio Sato, Daisuke Makino, Yoshiaki Wakashima
  • Patent number: 4493532
    Abstract: Pleochroic azo dyes represented by the formula (I): ##STR1## wherein X represents group --OCOR.sup.1 or --COOR.sup.1 (wherein R.sup.1 represents an alkyl group, an alkoxyalkyl group, an alkoxyphenyl group, an alkylcyclohexyl group, an alkoxyalkylcyclohexyl group, a cycloalkylcyclohexyl group, an alkoxycyclohexyl group, or a phenyl group substituted by a substituent selected from among an alkyl group containing 3 to 18 carbon atoms, an alkoxyalkyl group, a cycloalkyl group, an aryl group, a cyano group, a halogen atom, an acyloxy group, a carboxylic acid ester group, and an arylazo group); Y represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, a cycloalkyl group, an alkoxy group, a nitro group, a cyano group, a carboxylic acid ester group, an acyloxy group, an alkylsulfonyl group, an aryl group, a halogen atom, or group ##STR2## wherein R.sup.2 and R.sup.3 each represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, or R.sup.2 and R.sup.
    Type: Grant
    Filed: November 16, 1982
    Date of Patent: January 15, 1985
    Assignees: Hitachi, Ltd., Mitsubishi Chemical Industries, Ltd.
    Inventors: Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama, Shuji Imazeki, Akio Mukoh, Mikio Sato
  • Patent number: 4483593
    Abstract: The present liquid crystal composition is characterized by containing a dye of anthraquinone series represented by the following general formula (1) dissolved as a guest in a host liquid crystal: ##STR1## wherein R represents an alkyl group or a cycloalkyl group. The alkyl group or the cycloalkyl group of the dye of anthraquinone series includes those substituted by alkyl, hydroxyl, alkoxy, cycloalkyl, aryl, aryloxy, dialkylamino, or heterocyclic residue. Furthermore, the liquid crystal composition can contain two or more other kinds of the dye of anthraquinone series, or can be used in combination with other dyes. In the dye of anthraquinone series, the group --COOR at the 2-position and the group --CN at the 3-position are particularly important for realization of cyan color and a high S value.The dye of anthraquinone series is particularly effective for preparation of a black dye.
    Type: Grant
    Filed: March 18, 1982
    Date of Patent: November 20, 1984
    Assignees: Hitachi, Ltd., Mitsubishi Chemical Industries Limited
    Inventors: Shuji Imazeki, Akio Mukoh, Mikio Sato, Seiichi Imahori, Masaharu Kaneko, Tetsuo Ozawa
  • Patent number: 4480404
    Abstract: A locking apparatus for a detachable sunshade for a vehicle which includes a detachable panel, a connecting pin, a sunshade detachably attached to an interior portion of the detachable panel and detachably engaged with the detachable panel at a rear portion thereof via the connecting pin, a shaft supported on the sunshade, an arm fixed to the connecting arm and the shaft, a locking handle pivotally supported on the sunshade and fixed to the shaft, a knob connected to the locking handle for rotating the locking handle and a torsion spring for biasing the connecting pin in a direction for engagement with the detachable panel.
    Type: Grant
    Filed: March 5, 1982
    Date of Patent: November 6, 1984
    Assignee: Aisin Seki Kabushiki Kaisha
    Inventors: Mikio Sato, Asao Ogasawara, Keiji Mori
  • Patent number: 4454057
    Abstract: A liquid crystal composition comprising a host liquid crystal and at least one perylene dye dissolved therein represented by the formula: ##STR1## wherein X represents an oxygen atom or a sulfur atom, R.sup.1 and R.sup.2 each represents an aryl group when X represents an oxygen atom; or an aryl group or an alkyl group containing 1 to 18 carbon atoms when X represents a sulfur atom.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: June 12, 1984
    Assignees: Hitachi Ltd., Mitsubishi Chemical Industries Limited
    Inventors: Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama, Shuji Imazeki, Akio Mukoh, Mikio Sato
  • Patent number: 4434072
    Abstract: A liquid crystal composition comprising a host liquid crystal And a pleochroic dye dissolved therein as a guest material is described, which is characterized in that the pleochroic dye contains an anthraquinone-based dye yielding a Magenta color and/or an orange color.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: February 28, 1984
    Assignees: Mitsubishi Chemical Industries, Ltd., Hitachi Ltd.
    Inventors: Seiichi Imahori, Masaharu Kaneko, Tetsuo Ozawa, Shuji Imazeki, Akio Mukoh, Mikio Sato
  • Patent number: 4408840
    Abstract: A liquid crystal composition contains a pleochroic dye which is an anthraquinone dye having the group --OCOO-- in a substituent group. Such a dye shows a reasonable order parameter and good solubility as well as stability in the liquid crystal composition.
    Type: Grant
    Filed: September 22, 1981
    Date of Patent: October 11, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Shuji Imazeki, Akio Mukoh, Mikio Sato
  • Patent number: 4396251
    Abstract: A pleochroic color display device is provided which comprises a layer of guest-host type liquid crystal sandwiched between two transparent electrodes for driving the liquid crystal, the guest-host liquid crystal containing a dichroic dye as guest material, and a color filter disposed in front or rear of the layer of the guest-host type liquid crystal. High contrast pleochroic color displays can be obtained by selecting a blackish dye as the dichroic dye. Dichroic displays other than white ones can be produced by the use of a single liquid crystal cell and a single color filter (with one color).
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: August 2, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Akio Mukoh, Fumio Nakano, Hideaki Kawakami, Hirosada Morishita, Mikio Sato, Hidetoshi Abe, Shuji Imazeki
  • Patent number: 4381886
    Abstract: A liquid crystal display element which may have a multi-layer structure comprising substrates having electrodes and liquid crystal orientation controlling films on the sides thereof facing a liquid crystal layer and one or more liquid crystal layers interposed between said substrates, characterized in that the liquid crystal orientation controlling film is made from a copolymer produced by reacting a dibasic acid dihydrazide, a diamine and a tetracarboxylic acid dianhydride, followed by ring closure and dehydration with heating, is excellent in transparency and the electrode (partially reflected) pattern is hardly observable.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: May 3, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Hisao Yokokura, Teruo Kitamura, Ren Ito, Fumio Nakano, Hirosada Morishita, Mikio Sato, Yasuhiko Kando
  • Patent number: 4247628
    Abstract: The stability of a cyan dye image formed by phenol and naphthol couplers is improved with respect to "dark fading" by incorporating in the silver halide color photographic material in which the dye image is formed at least one 2-phenyl benzotriazole compound having in the 2'-position an --OR group wherein R is an organic residue.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: January 27, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takashi Uchida, Shoji Kikuchi, Takashi Sasaki, Mikio Sato
  • Patent number: RE31030
    Abstract: Polysaccharides forming gels are produced by cultivating .[.a.]. microorganism .[.such as Arthrobacter carbazolum.]. .Iadd.strain .Iaddend.FERM 2574 .Iadd.(ATCC-31258) .Iaddend.in a suitable medium.
    Type: Grant
    Filed: September 4, 1980
    Date of Patent: September 14, 1982
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Kenichi Hisatsuka, Saburo Ishiyama, Akira Inoue, Osamu Tsumura, Mikio Sato
  • Patent number: RE31664
    Abstract: Polysaccharides forming gels are produced by cultivating .[.a.]. microorganism .[.such as Arthrobachter carbazolum.]. .Iadd.strain .Iaddend.FERM 2574 .Iadd.(ATCC-31258) .Iaddend.in a suitable medium.
    Type: Grant
    Filed: September 4, 1980
    Date of Patent: September 4, 1984
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Kenichi Hisatsuka, Saburo Ishiyama, Akira Inoue, Osamu Tsumura, Mikio Sato