Patents by Inventor Susumu Era
Susumu Era 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: 5484685Abstract: A naphthalocyanine derivative of the formula: ##STR1## wherein M, Y, R.sup.1, k, l, m, n are as defined in the specification, is an effective substance for forming a recording layer on a substrate of an optical recording medium having high sensitivity with good properties.Type: GrantFiled: May 30, 1991Date of Patent: January 16, 1996Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Seiji Tai, Nobuyuki Hayashi, Koichi Kamijima, Mitsuo Katayose, Takayuki Akimoto, Shigeru Hayashida, Hideo Hagiwara, Susumu Era, Setsuo Kobayashi, Akio Mukoh
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Patent number: 5321078Abstract: A thermoplastic resin composition comprising (A) 45 to 99% by weight of a graft copolymer obtained by special graft polymerization of a monomer (b) such as an aromatic vinyl compound, a methacrylic ester, etc. in the presence of grafted polymer rubber (a), and (B) 55 to 1% by weight of a thermoplastic aromatic polyester resin can yield shaped articles excellent in impact resistance, chemical resistance, etc. with excellent processability.Type: GrantFiled: September 25, 1992Date of Patent: June 14, 1994Assignee: Hitachi Chemical Co., Ltd.Inventors: Kiyotaka Mashita, Tatsuo Ishikawa, Susumu Era, Isamu Hattori
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Patent number: 5219706Abstract: There are disclosed a novel naphthalocyanine derivative represented by the general formula [I] or [II] shown below, a process for preparing said derivative, an optical information recording medium using said derivative, and a process for preparing thereof: ##STR1## wherein M is a metal, metal oxide, metal hydroxide and the like, R.sup.1 is an alkyl group of 1-22 carbon atoms, n is an integer of 1 to 4, and Y.sub.1 and Y.sub.2 aryloxy group and the like.Type: GrantFiled: January 21, 1992Date of Patent: June 15, 1993Assignee: Hitachi, Ltd.Inventors: Seiji Tai, Shigeru Hayashida, Nobuyuki Hayashi, Yasushi Iwakabe, Shunichi Numata, Noriyuki Kinjo, Susumu Era, Setsuo Kobayashi, Akio Mukoh, Yoshio Sato
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Patent number: 5214188Abstract: 2,3-dicyanonaphthalene derivatives useful in the synthesis of naphthalocyanine derivatives are disclosed. The 2,3-dicyanonaphthalene derivatives have the formula: ##STR1## wherein each R.sup.1 may be the same or different and represents an alkyl group, substituted alkyl group, or aryl group; and n is an integer from 1 to 4.Type: GrantFiled: May 2, 1991Date of Patent: May 25, 1993Assignees: Hitachi, Ltd., Hitachi Chemical Company, Ltd.Inventors: Seiji Tai, Shigeru Hayashida, Nobuyuki Hayashi, Hideo Hagiwara, Mitsuo Katayose, Koichi Kamijima, Takayuki Akimoto, Susumu Era, Setsuo Kobayashi, Akio Mukoh
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Patent number: 5180786Abstract: An impact modifier obtained by emulsion polymerizing acrylic monomer(s), etc., in the presence of a conjugated diene rubber to give a graft rubber polymer, or obtained by polymerizing acrylic monomer(s) and the like ethylenically unsaturated monomers in the presence of the graft rubber polymer, is effective for improving impact resistance and weathering resistance of molded articles obtained from thermoplastic resin compositions containing such an impact modifier.Type: GrantFiled: November 7, 1989Date of Patent: January 19, 1993Assignee: Hitachi Chemical Company, Ltd.Inventors: Susumu Era, Toshio Matsumoto, Yoshinori Kobayashi, Masashi Shitara, Isamu Hattori, Yoshihiro Nomura
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Patent number: 5034309Abstract: Novel naphthalocyanine derivatives are disclosed in the specification are useful for forming a recording layer in an optical recording medium. These derivatives are represented by the following formula (I): ##STR1## in which k, l, m and n, which may be the same or different, are zero or integers of 1 to 4, k+l+m+n being an integer of 1 or more; R.sup.1 's in a number of (k+l+m+n), which may be the same or different, are alkyl groups, substituted alkyl groups, or aryl groups; M is Si, Ge or Sn; and two Y's, which may be the same or different, are aryloxyl groups, alkoxyl groups, trialkylsiloxyl groups, triarylsiloxyl groups, trialkoxysiloxyl groups, triaryloxysiloxyl groups, trityloxyl groups, or acyloxyl groups. These derivatives are especially useful in the preparation of an optical recording medium.Type: GrantFiled: June 24, 1988Date of Patent: July 23, 1991Assignees: Hitachi Chemical Co., Ltd., Hitachi, Ltd.Inventors: Seiji Tai, Shigeru Hayashida, Nobuyuki Hayashi, Hideo Hagiwara, Mitsuo Katayose, Koichi Kamijima, Takayuki Akimoto, Susumu Era, Setsuo Kobayashi, Akio Mukoh
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Patent number: 5020883Abstract: A ferroelectric liquid crystal device which comprises at least one pair of counterposed substrates, a ferroelectric liquid crystal material provided between the substrates, means for applying an electric field to the liquid crystal material and provided at the substrates, an alignment-controlling layer provided on the surface on the liquid crystal material side of each of the substrates, and a sealing member at the peripheral edges of the substrates, the alignment-controlling layer being a film of an organic polymer whose .beta. dispersion temperature is higher than the curing temperature of a sealant for the sealing member, preferably at least 200.degree. C., has a good alignment state of ferroelectric liquid crystal molecules achieved by cooling alone without any application of an electric field and has good display qualities such as a high contrast.Type: GrantFiled: October 27, 1988Date of Patent: June 4, 1991Assignee: Hitachi, Ltd.Inventors: Susumu Era, Kishiro Iwasaki, Hisao Yokokura, Yasuo Hanawa, Katsumi Kondo, Tadao Nakada, Teruo Kitamura, Akio Mukoh
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Patent number: 4942073Abstract: In an optical data storage medium comprising a resin, substrate, a primary coat formed thereon and a recording layer of a dye decomposable by a laser beam formed on the primary coat, said primary coat is a silicone resin layer whose surface had been subjected to a plasma treatment. The primary coat prevents the substrate from attack by solvent for forming the recording layer, and enables the recording layer to be uniform in thickness with good adhesion.Type: GrantFiled: February 24, 1989Date of Patent: July 17, 1990Assignee: Hitachi, Ltd.Inventors: Susumu Era, Setsuo Kobayashi, Mariko Nakamura, Akio Mukoh
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Patent number: 4927735Abstract: Disclosed are a novel naphthalocyanine dye shown in the specification, a method for preparing the same, and an optical information recording medium employing the same.According to the present invention, there can be obtained a novel naphthalocyanine dye, a method for preparing the same, and an optical information recording medium employing the same, which has excellent characteristics in recording/reading out property and in reading stability.Type: GrantFiled: December 31, 1987Date of Patent: May 22, 1990Assignee: Hitachi Chemical Company, Ltd.Inventors: Susumu Era, Setsuo Kobayashi, Akio Mukoh
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Patent number: 4781439Abstract: A liquid crystal display element comprising a pair of substrates, a pair of electrodes provided on the respective substrates, at least one of which is transparent and a liquid crystal layer disposed between said substrates, the liquid crystal layer comprising a nematic liquid crystal, which exhibits a positive dielectric constant anisotropy and contains an optically active substance, the liquid crystal moleccule orientation direction in the liquid crystal layer is twisted in the range of 200.degree. to 250.degree. from the one substrate surface toward the other substrate surface so as to form a helical structure therein. A polyimide orientation film is provided between the electrodes and the liquid crystal layer. The polyimide orientation film is one made of a polyimide prepared by reacting a diamine compound having a long-chain hydrocarbon group or a diamine compound having a trifluoromethyl group with a tetracarboxylic dianhydride and causes a pretilt angle of at least 3.degree.Type: GrantFiled: January 22, 1987Date of Patent: November 1, 1988Assignee: Hitachi, Ltd.Inventors: Hisao Yokokura, Tadao Nakata, Susumu Era, Yasuo Hanawa, Kishiro Iwasaki, Teruo Kitamura, Akio Mukoh, Toshikazu Narahara, Yasuhiko Kando, Shunichi Numata, Kooji Fujisaki
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Patent number: 4759614Abstract: The element comprises a pair of transparent substrates, a pair of light-transmitting electrodes each provided on the respective substrates, a ferroelectric liquid crystal layer disposed between the pair of substrates and orientation control films for the molecules of the ferroelectric liquid crystal provided between the electrodes and the ferroelectric liquid crystal layer. The orientation control film controls a tile angle of a biphenyle series nematic liquid crystal having biphenyl ring system below 1.5.degree. and causes a uniform molecule orientation characteristic and a memory property for the ferroelectric liquid crystal element of smectic C* liquid crystal and having a liquid crystal layer thickness of even more than 4 .mu.m.Type: GrantFiled: July 10, 1986Date of Patent: July 26, 1988Assignee: Hitachi, Ltd.Inventors: Hisao Yokokura, Katsumi Kondo, Yasuo Hanawa, Susumu Era, Kishiro Iwasaki, Tadao Nakata, Masato Isogai, Teruo Kitamura, Akio Mukoh, Yasuhiko Kando
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Patent number: 4653866Abstract: A liquid crystal compound of the formula: R.sub.2 --X.sub.1 --Y.sub.1 --C(O)S--Y.sub.2 --Z, wherein R.sub.2 is preferably C.sub.7-14 alkyl; X.sub.1 is --COO-- or --OCO; ##STR1## and Z is --NO.sub.2 or --CN, shows a smectic phase, is large in positive delectric anisotropy and can give a liquid crystal composition suitable for use in a thermal address display device.Type: GrantFiled: May 20, 1985Date of Patent: March 31, 1987Assignee: Hitachi, Ltd.Inventors: Susumu Era, Hisao Yokokura, Kishiro Iwasaki, Tadao Nakata, Teruo Kitamura, Akio Mukoh
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Patent number: 4645305Abstract: The present liquid crystal compounds are novel ester-type compounds showing a smectic liquid crystal phase and being capable of increasing a dielectric constant anisotropy, represented by the following general formula: R--X.sub.1 --Y.sub.1 --X.sub.2 --Y.sub.2 --NO.sub.2, wherein R is an alkyl group; X.sub.1 and X.sub.2 are the same or different from each other and are group --COO-- and --OOC--, and when X.sub.1 is group --COO--, ##STR1## The present liquid composition contains the novel compound, and the present liquid crystal display device uses the liquid crystal composition for utilizing the characteristics of the novel compound. Particularly, the present liquid crystal display device is a thermally addressed display device.Type: GrantFiled: November 23, 1984Date of Patent: February 24, 1987Assignee: Hitachi, Ltd.Inventors: Hisao Yokokura, Susumu Era, Hidetoshi Abe, Tadao Nakata, Teruo Kitamura, Akio Mukoh
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Patent number: 4634228Abstract: Orientation control films are coated on a pair of transparent substrates on the side contiguous to the ferroelectric liquid crystal layer and rubbed for aligning molecules thereof. The films are made of a polyimide polymer prepared by ring closure by heating and dehydrating of a polyamic acid which is synthesized by condensing, for example, pyromellitic dianhydride with 4,4'-diaminoterphenyl. A contrast ratio of the ferroelectric liquid crystal element is improved while keeping a high response characteristic of the ferroelectric liquid crystal materials.Type: GrantFiled: May 1, 1984Date of Patent: January 6, 1987Assignee: Hitachi, Ltd.Inventors: Kishiro Iwasaki, Susumu Era, Hisao Yokokura, Tadao Nakata, Akio Mukoh
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Patent number: 4460783Abstract: An ether imide of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and D are as defined in the specification produced by reacting a diamine with an ethylenically unsaturated dicarboxylic acid can give a composition together with one or more unsaturated polyesters, epoxy compounds, amines, and the like to give shaped articles excellent in flexibility and heat resistance.Type: GrantFiled: January 19, 1981Date of Patent: July 17, 1984Assignee: Hitachi, Ltd.Inventors: Akio Nishikawa, Masashi Shitara, Susumu Era, Toshiaki Fukushima, Hiroshi Suzuki, Hisashi Kohkame
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Patent number: 4278786Abstract: A heat-resistant polyamide polymer having melt-moldability is obtained by reacting an aromatic diamine having the general formula: ##STR1## with an equivalent amount of aromatic dicarboxylic acid dihalide in an organic solvent in the presence of an aqueous solution of an alkali-metal hydroxide. When an equimolar mixture of terephthalic acid dihalide and isophthalic dihalide is reacted with the diamine, polyamide polymers with good melt-moldability are obtained.Type: GrantFiled: July 5, 1979Date of Patent: July 14, 1981Assignee: Hitachi, Ltd.Inventors: Ken Nanaumi, Fusaji Shoji, Hisashi Kohkame, Susumu Era
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Patent number: 4154777Abstract: High impact and weather resistant graft copolymers are produced by a two-stage process comprising (I) carrying out bulk or suspension polymerization of a mixture obtained by impregnating a substantially non-polar rubber-like polymer having iodine value of 2 to 40 with a mixture of an aromatic vinyl compound and a polar vinyl compound in the presence of a polymerization initiator to yield a graft copolymer, and (II) subjecting a mixture obtained by dispersing with partly dissolving (or impregnating) the graft copolymer in (or with) a mixture of an aromatic vinyl compound and a polar vinyl compound to bulk, suspension or bulk-suspension polymerization in the presence of a polymerization initiator.Type: GrantFiled: August 26, 1977Date of Patent: May 15, 1979Assignee: Hitachi Chemical Company, Ltd.Inventors: Fusaji Shoji, Susumu Era, Hisashi Kogame, Tatsuo Ito, Koichi Kakefuda, Kiyoyuki Suzue
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Patent number: RE34885Abstract: A liquid crystal display element comprising a pair of substrates, a pair of electrodes provided on the respective substrates, at least one of which is transparent and a liquid crystal layer disposed between said substrates, the liquid crystal layer comprising a nematic liquid crystal, which exhibits a positive dielectric constant anisotropy and contains an optically active substance, the liquid crystal moleccule orientation direction in the liquid crystal layer is twisted in the range of 200.degree. to 250.degree. from the one substrate surface toward the other substrate surface so as to form a helical structure therein. A polyimide orientation film is provided between the electrodes and the liquid crystal layer. The polyimide orientation film is one made of a polyimide prepared by reacting a diamine compound having a long-chain hydrocarbon group or a diamine compound having a trifluoromethyl group with a tetracarboxylic dianhydride and causes a pretilt angle of at least 3.degree.Type: GrantFiled: June 29, 1992Date of Patent: March 28, 1995Assignee: Hitachi, Ltd.Inventors: Hisao Yokokura, Tadao Nakata, Susumu Era, Yasuo Hanawa, Kishiro Iwasaki, Teruo Kitamura, Akio Mukoh, Toshikazu Narahara, Yasuhiko Kando, Shunichi Numata, Kooji Fujisaki