Patents by Inventor Fumio Nakano

Fumio Nakano 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: 4612127
    Abstract: A substantially water-free, liquid lubricant for metal forming, which comprises a lubricating oil, and at least one of linearly condensed phosphorus compounds represented by the following general formula (1):M.sub.m H.sub.n+2-m P.sub.n O.sub.3n+1 (1)wherein m is an integer of 0, 1, . . . , n+1, n is an integer of 2 to 6, and M is an alkali metal, and cyclically condensed phosphorus compounds represented by the following general formulae (2) and (3):(HPO.sub.3).sub.n (2)M.sub.x H.sub.y (PO.sub.3).sub.x+y (3)wherein n is an integer of 2 to 8, M is an alkali metal, and each of x and y is an integer of 1 or more, where x+y.ltoreq.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: September 16, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Takao Uematsu, Shigeki Komatsuzaki, Tomoe Takamura, Fumio Nakano, Toshikazu Narahara
  • Patent number: 4586791
    Abstract: A liquid crystal optical modulation element is disclosed. The modulation element comprises two transparent substrates positioned so as to face each other; a transparent electrode provided on the facing surface of the transparent substrates; a transparent insulating/orientation control layer provided on each of the facing surfaces of the transparent electrodes, having insulating properties and orientating the liquid crystal molecules in the proximity thereof in a preferential direction substantially parallel to the surfaces of the substrates; a liquid crystal layer exhibiting ferroelectricity, sandwiched between the insulating/orientation control layers; and means for polarizing light passing through said liquid crystal layer.
    Type: Grant
    Filed: April 6, 1983
    Date of Patent: May 6, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Masato Isogai, Kishiro Iwasaki, Fumio Nakano
  • Patent number: 4508429
    Abstract: A method for driving a liquid crystal element including a ferroelectric liquid crystal sandwiched between a pair of substrates having electrodes on their opposite surfaces is disclosed. A pulse voltage for defining the light transmitting state of the liquid crystal element is applied to the ferroelectric liquid crystal. Before and/or after the application of the pulse voltage, the ferroelectric liquid crystal is applied with a voltage signal which renders the average value of voltages applied to the ferroelectric liquid crystal equal to zero.
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: April 2, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiharu Nagae, Masato Isogai, Hideaki Kawakami, Fumio Nakano
  • Patent number: 4490496
    Abstract: A coating composition comprising (A) a thermoplastic resin having a glass transition temperature of 0.degree. to 80.degree. C., (B) a compound having 2 or more hydroxyl groups in the molecule, (C) a thixotropic agent and (D) a solvent, and said coating composition having a viscosity of 3 to 50 poises at 25.degree. C. and a thixotropy of 2 or more can give a moistureproof insulating coating film with uniform and large thickness and very few bubbles by one-time treatment over packing circuit boards.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: December 25, 1984
    Assignees: Hitachi Chemical Co., Ltd., Hitachi, Ltd.
    Inventors: Iwao Maekawa, Eiji Omori, Isao Uchigasaki, Hideyuki Tobita, Naoki Yokoyama, Seikichi Tanno, Fumio Nakano, Ren Ito
  • Patent number: 4469409
    Abstract: A liquid crystal display device comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by an aromatic ring-containing silane group, and an organic polymer at the electrode side, where the heat resistance and adhesiveness of the coating film to the electrode substrates are improved without any undercoating film therebetween.
    Type: Grant
    Filed: August 18, 1982
    Date of Patent: September 4, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Nakano, Kishiro Iwasaki, Seikichi Tanno
  • Patent number: 4400059
    Abstract: A color liquid crystal display device wherein a nematic liquid crystal to which a dichroic dye and an optically active substance have been added is used as the liquid crystal layer and the amount of said optically active substance added is so selected as to fall in a range making steep the threshold voltage characteristics of the liquid crystal.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: August 23, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiharu Nagae, Tetsuo Ito, Masaaki Kitajima, Hideaki Kawakami, Fumio Nakano, Hidetoshi Abe, Masato Isogai, Michio Ooue, Akio Mukoh
  • 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: 4362771
    Abstract: This invention relates to a liquid crystal display element comprising a pair of transparent substrates, electrodes formed on the individual surfaces thereof facing each other, a liquid crystal material layer held between the substrates, and gap controlling material for keeping the gap between the substrates, and is characterized in that the gap controlling material is dispersed and fixed on the substrate surface by an insulating coating film such as an orientation controlling film.When the gap controlling material is thus dispersed and fixed, it does not move between the substrates, and hence the change of the gap length between the substrates is prevented, so that there can be obtained a liquid crystal display element in which the distance between the substrates is uniform.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: December 7, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Takao Umeda, Tatsuo Igawa, Yuzuru Simazaki, Takao Miyashita, Fumio Nakano
  • Patent number: 4076646
    Abstract: A liquid crystal composition for field effect display devices, comprising a nematic liquid crystal composition having a substantially positive dielectric anisotropy and at least one of o-terphenyl and m-terphenyl. This composition sufficiently functions at 2 V, because the threshold voltage of the liquid crystal composition can be made about 1.5 V.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: February 28, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Nakano, Hisao Yokokura, Kenji Murao
  • Patent number: 3966631
    Abstract: A nematic liquid crystal composition having an improved response to a pulsating driving voltage for effecting a dynamic scattering mode which comprises a predominant amount of a nematic liquid crytal having properties of the dynamic scattering mode and 0.001 to 3% by weight of an onium halide salt having a nitrogen atom as a nucleus, the composition further containing a phenolic compound for improving the solubility of the onium halide salt in the lqiuid crystal and assisting in increasing the degree of dissociation of the neutral onium halide salt to ions.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: June 29, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhisa Toriyama, Hidetoshi Abe, Fumio Nakano, Kenji Murao, Mikio Sato
  • Patent number: 3956169
    Abstract: A nematic liquid crystal composition having an improved responsibility to a pulsating driving voltage and a prolonged descent time of dynamic scattering mode which comprises a predominant amount of a nematic liquid crystal having properties of dynamic scattering mode, 0.1 to 1 % by weight of a cholesteric compound and 0.01 to 5 % by weight of a halide of an organic quaternary nitrogen compound.
    Type: Grant
    Filed: February 21, 1974
    Date of Patent: May 11, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Nakano, Kazuhisa Toriyama, Noboru Nagata, Mikio Sato