Patents by Inventor Tsuyoshi Ikeda
Tsuyoshi Ikeda 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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Publication number: 20050176914Abstract: In the invention, a polyester resin comprising dicarboxylic acid constitutional units and diol constitutional units wherein 5 to 60 mol % of the diol constitutional units has a cyclic acetal skeleton is produced by a process comprising an oligomerization step and a polymerization step. In the oligomerization step, an ester having a limited acid value is transesterified with a diol having a cyclic acetal skeleton in the presence of a basic compound to obtain an oligomer. The oligomer is then polymerized in the subsequent polymerization step to increase the molecular weight.Type: ApplicationFiled: November 29, 2004Publication date: August 11, 2005Inventors: Takeshi Hirokane, Shojiro Kuwahara, Tsuyoshi Ikeda, Nobuya Saegusa, Tomohito Oyama
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Patent number: 6927275Abstract: The process of the present invention for producing a polyester resin comprising a dicarboxylic acid constitutional unit and a diol constitutional unit having a cyclic acetal skeleton comprises a step (1) of subjecting a diol (A) having a cyclic acetal skeleton and an ester (D) to transesterification reaction and a step (2) of mainly converting the resultant oligomer into a high polymer. The step (1) simultaneously satisfies the requirements (i) to (iv) as described in the specification. In the process of the present invention, the polyester resins having excellent moldability and mechanical properties are stably produced by a transesterification method which is less detrimental to environments.Type: GrantFiled: September 11, 2003Date of Patent: August 9, 2005Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Takeshi Hirokane, Tsuyoshi Ikeda, Shojiro Kuwahara, Takamasa Kawashima, Tomohito Oyama
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Publication number: 20050075466Abstract: The invention provides a thermoplastic resin composition which is excellent in transparency, heat resistance, resistance to chemicals, and mechanical strength as well as moldability, printability, etc. The thermoplastic resin composition containing a polycarbonate resin in an amount of 2 to 99.5 wt. % and a polyester resin in an amount of 98 to 0.5 wt. %, wherein the polyester resin (B) contains diol units each having a cyclic acetal skeleton in an amount of 20 to 60 mol % with respect to total diol structural units.Type: ApplicationFiled: December 20, 2002Publication date: April 7, 2005Inventors: Dai Oguro, Takeo Hayashi, Masahiro Kurokawa, Tsuyoshi Ikeda, Takeshi Hironake
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Publication number: 20050000750Abstract: It is one object of the present invention to provide a flow controlling apparatus for a power steering preventing a driver from feeling incompatibility. The flow controlling apparatus for the power steering comprises; a variable throttle mechanism installed in the pump to change fluid of discharged oil from the pump to a hydraulic device; a linear solenoid mechanism controlling the variable throttle mechanism by said predetermined energized current; a spool feeding back the exceeding fluid of said discharged oil to a bypass passage of the pump in accordance with differential pressure between upstream and downstream at the variable throttle mechanism when the exceeding fluid exceeds a predetermined value; and control means controlling the energized current to change transition process in accordance with a steering angular velocity of the steering wheel.Type: ApplicationFiled: June 22, 2004Publication date: January 6, 2005Applicant: TOYODA KOKI KABUSHIKI KAISHAInventor: Tsuyoshi Ikeda
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Publication number: 20040195038Abstract: A flow controlling apparatus to control flow rate of working fluid discharged from pump apparatus to a power steering apparatus including a electric variable throttle, a solenoid mechanism and a spool. The solenoid mechanism varies opening degree of the electric variable throttle based on a electric signal from electric controller. The spool slides in accordance with the differential pressure of the variable throttle due to increase of flow rate of working fluid discharged from pump apparatus so as to return excess working fluid to bypass passage connecting to a suction port of pump apparatus. The flow controlling apparatus further comprising means for increase flow rate of bypass flow to bypass passage when rotating speed of the pump apparatus exceed predetermined value.Type: ApplicationFiled: March 31, 2004Publication date: October 7, 2004Applicant: TOYODA KOKI KABUSHIKI KAISHAInventors: Tsuyoshi Ikeda, Nobuyuki Kawabata
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Patent number: 6750001Abstract: A silver halide color photographic material is disclosed, comprising support having thereon a yellow image forming layer, a magenta image forming layer and a cyan image forming layer, each of which contains light sensitive silver, halide, wherein when the photographic material having been exposed to light for 10−10 to 10−3 sec. per pixel and processed, an effective tone range of a color image obtained in each of the color image forming layers is 0.65 to 0.84.Type: GrantFiled: December 30, 2002Date of Patent: June 15, 2004Assignee: Konica CorporationInventors: Tsuyoshi Ikeda, Kazuhiro Miyazawa, Hirokazu Sato, Motoi Nishimura
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Publication number: 20040076536Abstract: In a hydraulic pump, a cam ring 21 is provided in a cylindrical adaptor 13 for movement in a radial direction, and a differential pressure control valve 31 is provided to control internal pressure and load pressure at the front and back sides of a variable orifice 54 to be introduced into action chambers 51a and 51b formed at the opposite sides of the cam ring for controlling a discharge amount of the pump in accordance with the rotation speed of the pump. The differential pressure control valve is operated under the internal pressure and load pressure respectively introduced into action chambers 52a and 52b and the load of a thrust spring 33 biasing the differential pressure control valve toward the internal pressure chamber 52a. The load of the thrust spring is increased or decreased in accordance with an increase or a decrease of the load pressure.Type: ApplicationFiled: November 21, 2003Publication date: April 22, 2004Inventors: Mikio Suzuki, Yoshiharu Inaguma, Keiji Suzuki, Hideya Kato, Tsuyoshi Ikeda
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Publication number: 20040059084Abstract: The process of the present invention for producing a polyester resin comprising a dicarboxylic acid constitutional unit and a diol constitutional unit having a cyclic acetal skeleton comprises a step (1) of subjecting a diol (A) having a cyclic acetal skeleton and an ester (D) to transesterification reaction and a step (2) of mainly converting the resultant oligomer into a high polymer. The step (1) simultaneously satisfies the requirements (i) to (iv) as described in the specification. In the process of the present invention, the polyester resins having excellent moldability and mechanical properties are stably produced by a transesterification method which is less detrimental to environments.Type: ApplicationFiled: September 11, 2003Publication date: March 25, 2004Inventors: Takeshi Hirokane, Tsuyoshi Ikeda, Shojiro Kuwahara, Takamasa Kawashima, Tomohito Oyama
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Patent number: 6653440Abstract: In the production method of the present invention, a copolyester of intended sublimable diol proportion is produced by the reaction of a dicarboxylic acid and/or an ester-forming derivative thereof with a sublimable diol and a non-sublimable diol with an increased conversion of the sublimable diol. Since the escape of the sublimable diol is effectively prevented, the process solves the problem of clogging pressure-reduced pipes, etc. of an apparatus for polyester resin production.Type: GrantFiled: November 6, 2002Date of Patent: November 25, 2003Assignee: Mitsubishi Gas Chemical CompanyInventors: Takeshi Hirokane, Tsuyoshi Ikeda, Shojiro Kuwahara
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Publication number: 20030195303Abstract: Polyester resin composition (C) comprises polyester resin (A), which comprises polyester resin (l) comprising a diol unit having a cyclic acetal structure (CA) and a dicarboxylic acid unit having no CA, polyester resin (m) comprising a dicarboxylic acid unit having CA and a diol unit having no CA and/or polyester resin (n) comprising a diol unit having CA and a dicarboxylic acid unit having CA, and polyester resin (B) having no CA. The sum of the fraction of the dicarboxylic acid unit having CA in the entire dicarboxylic acid unit and the fraction of the diol unit having CA in the entire diol unit in composition (C) is 0.05% by mole or greater. The polyester resin compositions are excellent in transparency, melt viscoelasticity, heat resistance and moldability, and exhibit a samll crystallization rate.Type: ApplicationFiled: December 19, 2002Publication date: October 16, 2003Inventors: Tsuyoshi Ikeda, Takeshi Hirokane, Shojiro Kuwahara
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Publication number: 20030180671Abstract: A silver halide color photographic material is disclosed, comprising a support having thereon a yellow image forming layer, a magenta image forming layer and a cyan image forming layer, each of which contains light sensitive silver halide, wherein when the photographic material having been exposed to light for 10−10 to 10−3 sec. per pixel and processed, an effective tone range of a color image obtained in each of the color image forming layers is 0.65 to 0.84.Type: ApplicationFiled: December 30, 2002Publication date: September 25, 2003Inventors: Tsuyoshi Ikeda, Kazuhiro Miyazawa, Hirokazu Sato, Motoi Nishimura
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Publication number: 20030100702Abstract: In the production method of the present invention, a copolyester of intended sublimable diol proportion is produced by the reaction of a dicarboxylic acid and/or an ester-forming derivative thereof with a sublimable diol and a non-sublimable diol with an increased conversion of the sublimable diol. Since the escape of the sublimable diol is effectively prevented, the process solves the problem of clogging pressure-reduced pipes, etc. of an apparatus for polyester resin production.Type: ApplicationFiled: November 6, 2002Publication date: May 29, 2003Inventors: Takeshi Hirokane, Tsuyoshi Ikeda, Shojiro Kuwahara
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Patent number: 6450036Abstract: The invention is directed to a method and apparatus for diagnosing deterioration of an article having at least a covering layer made from an organic polymer material. The method comprises (i) forming a data group for deterioration diagnosis comprising deterioration diagnostic characteristic values and corresponding ultrasonic wave propagation characteristic values for samples having different material specifications, (ii) propagating an ultrasonic wave through the covering layer of the article to measure an ultrasonic wave propagation characteristic of the covering layer, and (iii) determining a corresponding deterioration diagnostic characteristic from the data group for the ultrasonic wave propagation characteristic of the covering layer.Type: GrantFiled: December 11, 2000Date of Patent: September 17, 2002Assignee: Mitsubishi Cable Industries, Ltd.Inventors: Tetsuya Ashida, Tsuyoshi Ikeda, Junichiro Ikehara, Masanori Fujii, Hiroshi Ishibashi, Yoshiro Habuka, Minoru Okamoto, Eiji Onuma, Hiroshi Kato
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Patent number: 6187944Abstract: Acrylonitrile compounds having pesticidal activity of formula (I) and salts thereof. wherein Q is Y is ═C(R4)— or ═N—, R1 is alkyl, haloalkyl, etc., each of R2 and R3 is halogen, alkyl which may be substituted, alkenyl which may be substituted, etc., R4 is hydrogen, halogen, alkyl or haloalkyl, 1 is from 1 to 4, m is from 0 to 5, n is from 0 to 3, q is from 0 to 4, when 1 is 2 or more, a plurality of R2 may be the same or different, when each of m, n and q is 2 or more, a plurality of R3 may be the same or different.Type: GrantFiled: August 16, 1999Date of Patent: February 13, 2001Assignee: Ishihara Sangyo Kaisha Ltd.Inventors: Toru Koyanagi, Yuji Nakamura, Masayuki Morita, Koji Sugimoto, Tsuyoshi Ikeda, Munekazu Ogawa
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Patent number: 6033831Abstract: A method for forming an image is disclosed. The method comprises the steps of exposing a photographic image forming medium by scanning by a light beam, and developing the photographic image forming medium to form an image,wherein the diameter and the intensity of light beam are controlled so that the diameter and the intensity satisfy the following relations (1), (2) and (3) within the range of the reflection optical density of an image to be formed after developing of from larger than 0.8 to 3.0;(1) the value of .alpha. is substantially the same as the value of .beta. when .alpha.=I.sub.d1 .times.D.sub.d1.sup.2 and .beta.=I'.sub.d1 .times.D.sub.0.8, and(2) D.sub.d1 <D.sub.0.8(3) (D.sub.d2 -D.sub.d1)/(d.sub.2 -.sub.1)<0wherein I.sub.d1 and D.sub.d1 are each intensity and diameter of light beam to form an image having relection optical density of d.sub.1 ; D.sub.0.8 is the diameter of light beam to form an image having density of 0.8; I'.sub.Type: GrantFiled: April 16, 1999Date of Patent: March 7, 2000Assignee: Konica CorporationInventors: Tsuyoshi Ikeda, Takahiko Nojima
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Patent number: 5460931Abstract: A light-sensitive silver halide photographic material is disclosed, comprising a reflective support comprising a resin layer-coated base paper and having thereon a silver halide emulsion layer , wherein a hydrophilic colloid layer containing a white pigment is provided between the resin layer and the silver halide emulsion layer; the resin layer having an uneven surface; and a Wiener spectrum of the silver halide photographic material satisfying the following relation,1.1<(WS2) / (WS1)<2.0wherein WS1 and WS2 are average intensities of the spectrum within a spatial frequency range of 2 to 3 mm.sup.-1 and 10 to 20 mm.sup.-1, respectively.Type: GrantFiled: November 14, 1994Date of Patent: October 24, 1995Assignee: Konica CorporationInventors: Shigeo Tanaka, Tsuyoshi Ikeda
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Patent number: 5438087Abstract: The present invention provides a paper sizing composition comprising a rosin material and cationic acrylamide and/or methacrylamide polymers having hydrophobic groups wherein said rosin material is directly emulsified in water with said polymers. The sizing composition has an improved storage stability and exhibits an excellent sizing performance in the acidic through neutral pH range.Type: GrantFiled: June 21, 1993Date of Patent: August 1, 1995Assignee: Japan PMC CorporationInventors: Tsuyoshi Ikeda, Kiyoshi Iwai, Koji Ohta, Satoshi Hyuga, Masatoshi Hotta
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Patent number: 5403705Abstract: A light-sensitive silver halide photographic material is disclosed. The light-sensitive material comprises a support having thereon a silver halide emulsion layer, and the silver halide emulsion layer comprises silver halide grains having a silver chloride content of not less than 95 mol %. The emulsion is optically sensitized by addition of a dispersion of an optical sensitizer comprising a medium and particles of the dye dispersed in the medium. The ratio of silver to gelatin (Ag/Gel) in the emulsion at the time of addition of the dispersion of the dye is 2 to 8.5.Type: GrantFiled: September 28, 1993Date of Patent: April 4, 1995Assignee: Konica CorporationInventors: Shigeo Tanaka, Makoto Kaga, Tsuyoshi Ikeda
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Patent number: 5322631Abstract: This invention relates to a water-soluble lubricant composition for a sleeve surface lubricating oil, an operating fluid, a cutting oil, a rolling oil, a drawing oil, a press oil or the like, which does not pollute the environment and has superior lubricity, metal corrosion preventing property, antifoaming property and antiseptic property. The water-soluble lubricant composition of this invention containing surfactants (a) and one or two salts (b) selected from among carboxylates and sulfonates is characterized in that the above one or two salts (b) selected from among carboxylates and sulfonates are alkaline earth metal salts or zinc salts and that substantially no nitrogen ingredients are contained and the amount of nitrogen contained represents its amount in impurities, or 0.5 wt % or below of nitrogen.Type: GrantFiled: October 29, 1993Date of Patent: June 21, 1994Assignee: Yushiro Chemical Industry Co., Ltd.Inventors: Masaharu Fuchigami, Tsuyoshi Ikeda, Masahiro Noda
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Patent number: 5278041Abstract: A silver halide color light-sensitive material is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer provided on the support. The emulsion layer comprises silver halide grains which have been formed in the presence of a complex of rhenium, molybdenum, iridium, rhodium, ruthenium, osmium, cadmium, zinc, palladium, platinum, gold, iron, nickel, cobalt, tungsten, or chromium each having at least one cyanate ligand, isocyanate ligand or fluminate ligand. The light-sensitive material is high in speed, low in fog and excellent in reciprocity low failure characteristics.Type: GrantFiled: March 30, 1992Date of Patent: January 11, 1994Assignee: Konica CorporationInventors: Shuji Murakami, Yukio Ohya, Tsuyoshi Ikeda, Shigeo Tanaka, Mitsuhiro Okumura