Patents by Inventor Yoshinori Yoshida

Yoshinori Yoshida 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: 5049156
    Abstract: An intra-ocular lens comprising a lens part and a fixing part for fixing the lens part in an eye, the lens part comprising a colorless and transparent polyimide containing at least one of repeating units represented by formulae (I) to (IV): ##STR1## wherein X.sub.1 represents ##STR2## X.sub.2 represents ##STR3## X.sub.3 represents ##STR4## Further, the lens part and the fixing part may be integrally molded together, if desired.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: September 17, 1991
    Assignees: Nitto Denko Corporation, Menicon Co., Ltd.
    Inventors: Kazumi Higashi, Kazuhide Fujita, Yoshinori Yoshida, Kiichiro Matsushita, Kazuhiko Nakada
  • Patent number: 5019479
    Abstract: A positive type radiation-sensitive resin composition comprising an alkali-soluble novolac resin and a 1,2-quinonediazide compound, characterized in that said alkali-soluble novolac resin is a resin produced by condensing a carbonyl compound and a phenol mixture comprising 6 to 94 mole % of m-cresol and 94 to 6 mole % of at least one compound represented by the formula (I) other than m-cresol: ##STR1## wherein X is --CH.sub.3, --C.sub.2 H.sub.5, --C(CH.sub.3).sub.3, --CO.sub.2 CH.sub.3 or --CO.sub.2 C.sub.2 H.sub.5 ; n is an integer satisfying 3.gtoreq.m.gtoreq.1; and m is an integer satisfying 3.gtoreq.m.gtoreq.1, in which resin when the polystyrene-reduced molecular weight is determined by a gel permeation chromatography using a monodisperse polystyrene as the standard, maximum values a, b and c present, respectively, in the molecular weight ranges of 6,300 to 25,000, 2,500 to 6,000 and 150 to 900 in the molecular weight distribution curve obtained satisfy the following relationships: a/b=0-1.5 and c/b=1.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: May 28, 1991
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Hiroshi Oka, Chozo Okuda, Yoshinori Yoshida, Toshihiko Takahashi, Yoichi Kamoshida, Takao Miura
  • Patent number: 4922484
    Abstract: An ISDN remote switching unit for accommodating analogue telephone subscriber lines and ISDN digital subscriber lines comprises at least one signal converter for each of the conventional analogue subscriber so that a line signal, an address signal and tone signal of each conventional analogue subscriber are converted into a signaling system of the ISDN digital subscribers line, and a traffic concentrator connected to the signal converter and disposed remote from a host exchange station, whereby the signaling system between the remote station and the host station is unified for both the analogue telephone subscriber and the ISDN digital subscriber.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: May 1, 1990
    Assignee: NEC Corporation
    Inventors: Yoshinori Yoshida, Akira Arutaki, Masao Hashimoto, Suminori Yoshikawa
  • Patent number: 4827473
    Abstract: A packet switching system for achieving high-speed packet switching on data lines having the X.25 protocol of the C.C.I.T.T. It includes a plurality of data line apparatuses (DLC: 10, 11, and 1N), a call connection control information transfer bus commonly connected to the plurality of data line apparatuses (CB: 2), a specialized data transfer bus for data packets (DB: 4), a packet buffer state information transfer bus for transmitting and receiving call state information (SB: 6), and a call connection controlling processor connected to the call connection control information transfer bus (CP: 3). Each of the data line apparatuses has a receive packet storing circuit (DTRQ: 102) provided with a receive packet buffer of the first-in random out (FIRO) memory, and a transmit packet storing circuit (DTSQ: 105) provided with a transmit packet buffer of the FIRO memory.
    Type: Grant
    Filed: May 29, 1987
    Date of Patent: May 2, 1989
    Assignee: NEC Corporation
    Inventors: Kazuo Tsuzuki, Yoshinori Yoshida, Toshio Ishizuka, Mitsugu Anezaki
  • Patent number: 4810556
    Abstract: Disclosed are a very soft polyolefin spunbonded nonwoven fabric and its production method. The polyolefin spunbonded nonwoven fabric according to the present invention is defined as (A) being formed of continuous polyolefin fibers having a fineness of 0.5 to 3 denier, (B) having basic weight between 30 g/m.sup.2 and 15 g/m.sup.2, and (C) having .sqroot.S.sub.MD .times.S.sub.TD of 2.5 g or below, wherein S.sub.MD and S.sub.TD are respectively the softnesses in the machine and transverse directions as measured by a handle-O-meter. The method of producing a strip of very soft polyolefin nonwoven fabric by directing polyolefin continuous fibers in a fixed direction, comprises the steps of: orienting the axes of the continuous fibers in the direction in which the continuous fibers are fed so as to form a web having a warp orientation factor (the maximum tensile strength in the direction in which the continuous fibers are fed, i.e.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: March 7, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Yoshinori Kobayashi, Naoyuki Tamura, Takanobu Sakai, Yoshinori Yoshida
  • Patent number: 4731782
    Abstract: An integrated service network ("ISDN") is structured to connect subscriber lines through a packet switching system to incoming or outgoing packet switching calls without passing them through a circuit switching system. This effectively uses the speech path of the circuit switching section instead of using it for packet switching calls. At the same time, the invention minimizes the influence of the introduction of the ISDN upon the software of the circuit switching section. The ISDN digital switching network applies to circuit switching calls which are switched at a local switch and to packet switching calls which are to be switched at a toll switch.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: March 15, 1988
    Assignee: NEC Corporation
    Inventors: Tomoyoshi Shimizu, Yoshinori Yoshida, Masao Hashimoto, Hideki Nakane
  • Patent number: 4547200
    Abstract: Slurry composition comprising a solid fuel powder, water and a compound having in its molecule a tricyclodecane or tricyclodecene skeleton and a sulfonic acid group attached to the skeleton.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: October 15, 1985
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Hironobu Shinohara, Kiyonobu Kubota, Yoshinori Yoshida
  • Patent number: 4511683
    Abstract: Compounds having a cyclopentadiene skeleton and at least one sulfonic acid group are novel, and produced by subjecting cyclopentadiene, dicyclopentadiene and/or hydroxydicyclopentadiene to sulfonation, and subjecting the same, before or after the sulfonation, to reaction with alkylbenzene, polymerization and/or condensation through an aldehyde. The aforesaid compounds are useful as dispersants for cement.By incorporating a polymer emulsion into a slurry composition comprising a powder and a dispersant having at least one sulfonic acid group the proportion of said polymer emulsion being 0.05 to 50 parts by weight per 100 parts by weight of said dispersant, the dispersing effect of said dispersant is improved, the fluidizing effect of the dispersant is further enhanced, the slump loss is made very small, and the workability becomes good.
    Type: Grant
    Filed: March 3, 1983
    Date of Patent: April 16, 1985
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Hironobu Shinohara, Noboru Yamahara, Yoshinori Yoshida
  • Patent number: 4465853
    Abstract: 3,4-Diacetoxybutene-1 can be easily isomerized into 1,4-diacetoxybutene-2 by contacting it with a cation exchange resin. This method is capable of providing an excellent reaction result and is free of the problem of corrosion of apparatus as well as the problem of formation of by-products. When acetic acid is present in said isomerization operation, the reaction rate is increased. Further, combination of this isomerization method with separation of 1,4-diacetoxybutene-2 from 3,4-diacetoxybutene-1 by distillation enables production of high-purity 1,4-diacetoxybutene-2 at a high efficiency.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: August 14, 1984
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Hironobu Shinohara
  • Patent number: 4454310
    Abstract: Polyamide acid obtained by reacting 2,3,5-tricarboxycyclopentane-acetic acid and a diamine in a solvent has a high stability in the form of a solution, has a high workability and is excellent in storage stability. Polyimide obtained by heating said polyamide acid is excellent in heat resistance, mechanical properties, electrical properties and chemical resistance.
    Type: Grant
    Filed: December 15, 1982
    Date of Patent: June 12, 1984
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Hiroshi Oka, Yoshinori Yoshida, Yuuzi Naitou
  • Patent number: 4321409
    Abstract: A process for producing a conjugated diene monoester by reacting a gaseous mixture comprising a conjugated diene, a carboxylic acid and oxygen as reactive components, in which the fraction of said conjugated diene is preferably 12-60 mole % and the fraction of oxygen is preferably 5-30 mole %, in the gas phase in the presence of a catalyst, characterized by carrying out the reaction in the presence of a catalyst which comprises, as active components, (a) palladium, (b) at least one member selected from the group consisting of magnesium, calcium, barium, cerium, lanthanum, tungsten, copper, zinc, cadmium, boron, thallium, molybdenum, tin, lead, phosphorous, arsenic and selenium and (c) at least one alkali metal carboxylate, or a catalyst which comprises, as active components, these three components (a), (b) and (c) together with (d) at least one alkali metal halide.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: March 23, 1982
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Hironobu Shinohara
  • Patent number: 4283579
    Abstract: A process for producing a diol by reacting an acetic ester of butanediol or butenediol with methanol, which comprises (a) continuously feeding to a first reaction-distilling column from its upper part a liquid acetic ester of butanediol or butenediol, while continuously feeding methanol to said column from its lower part, to bring both feeds into counter current gas-liquid contact in the presence of an acidic or a basic catalyst, to allow both feeds to react, and withdrawing from the bottom a bottom stream comprising a diol as major constituent, (b) continuously feeding to a hydrolyzer the distillate obtained from said first reaction-distilling column containing methyl acetate as major constituent, thus bringing said distillate into contact with water or steam in the presence of an acidic catalyst to hydrolyze the methyl acetate, (c) then continuously feeding the hydrolysis product thus obtained from the hydrolyzer to a second distilling column, withdrawing a methyl acetate-containing methanol stream from the
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: August 11, 1981
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Hiroshi Oka
  • Patent number: 4268447
    Abstract: A process for producing simultaneously tetrahydrofuran and 1,4-butanediol in any desired proportion which comprises (a) reacting the acetic ester of 1,4-butanediol with a theoretical or smaller quantity, based on said acetic ester, of water (preferably 0.2-0.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: May 19, 1981
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Hiroshi Oka
  • Patent number: 4228301
    Abstract: In a process for preparing diacetoxybutene by subjecting butadiene, acetic acid and oxygen to reaction, the discharge gas from the reaction system or purification system, containing butadiene and/or acetic acid, is treated by contacting with diacetoxybutene and/or diacetoxybutane (absorbent) to allow butadiene and/or acetic acid to be absorbed by said absorbent. A part of the diacetoxybutene separated in a distillation tower from the reaction product solution containing diacetoxybutene produced by said three-component reaction can be used as said absorbent. In this case, butadiene and/or acetic acid can be recovered from said discharge gas by supplying the absorption solution into said distillation tower. Also usable as said absorbent is diacetoxybutane obtained by hydrogenation of diacetoxybutene.
    Type: Grant
    Filed: October 11, 1978
    Date of Patent: October 14, 1980
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Hironobu Shinohara
  • Patent number: 4131743
    Abstract: Unsaturated diesters are produced by a process which comprises reacting, in a flowing gaseous phase, a gaseous mixture comprising a conjugated diene, a carboxylic acid and molecular oxygen in the presence of (A) a catalyst comprising palladium, vanadium, antimony and at least one alkali metal carboxylate, or in the presence of (B) a catalyst comprising palladium, vandium, antimony, at least one alkali metal carboxylate and at least one alkali metal halide. The catalyst (A) maintains a high activity and a high selectivity for a long time. The catalyst (B), in which further the alkali metal halide is added, shows a higher activity and a higher selectivity for a longer time. And its activity and selectivity are stable and durable at high temperatures such as 160.degree. - 200.degree. C. Furthermore, the addition of the alkali metal halide suppresses combustion reaction of dienes such as butadiene remarkably.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: December 26, 1978
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Tutomu Kobayashi, Hironobu Shinohara, Izumi Hanari
  • Patent number: 4028424
    Abstract: Unsaturated alcohols are prepared by reacting an .alpha.-olefin such as isobutene with an aldehyde such as formaldehyde in the presence of a phosphate preferably in an organic solvent. Unsaturated alcohols such as 3-methyl-3-butene-1-ol and 3-methyl-2-butene-1-ol are important intermediates for producing organic compounds such as isoprene.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: June 7, 1977
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yoshinori Yoshida, Yoshiro Yamamoto