Patents by Inventor Ryuichi Nakamura

Ryuichi Nakamura 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).

  • Publication number: 20020017864
    Abstract: A method of manufacturing a plasma display panel, which comprises the steps of filling a barrier rib-forming paste containing glass frit in a barrier ribs-forming intaglio and concurrently forming a paste layer having a constant thickness on the intaglio, superimposing a substrate on the barrier ribs-forming intaglio filled with the barrier rib-forming paste containing glass frit to thereby transfer the barrier rib-forming paste onto the substrate, and heating the barrier rib-forming paste that has been transferred to the substrate, thereby burning out existing organic components and concurrently sintering the glass frit to thereby form the barrier ribs and dielectric layer. The plasma display panel manufactured by this method is featured in that the barrier ribs and the dielectric layer are formed using the same barrier rib-forming material containing a low melting point glass frit.
    Type: Application
    Filed: August 10, 2001
    Publication date: February 14, 2002
    Applicant: Toppan Printing Co., Ltd.
    Inventors: Eizaburo Watanabe, Naoto Ohno, Katsumi Ohira, Junichi Arai, Isao Kato, Yasumasa Akimoto, Ikuma Nishimura, Takao Minato, Ryuichi Nakamura
  • Patent number: 5730616
    Abstract: An IC socket comprises socket board having a plurality of contacts for contacting corresponding lead terminals of an IC package, and a movable plate closed with respect to an upper surface of the socket board. The contacts are brought into contact with the corresponding lead terminals when the movable plate is laterally moved in one direction along the upper surface of the socket board, and the contacts are moved out of contact with the corresponding lead terminals when the movable plate is laterally moved in the other direction. The IC socket further comprises at least one block integrally formed on each of two opposite side edges of one of the movable plate and the socket board, which side edges are parallel with the lateral movement direction of the movable plate relative to the socket board. On each of the two opposite side edges, a pin is inserted into the at least one block so as to be fixed to and movable with the at least one block.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: March 24, 1998
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventor: Ryuichi Nakamura
  • Patent number: 5490796
    Abstract: An IC socket equipped with a dust discharge device includes an IC socket body having a plurality of contacts electrically connected in a pressed condition to a plurality of leads of an IC package, and a dust discharge duct mounted on the IC socket body end adapted to allow for the discharge of dust produced or generated from the leads or body of the IC package. An upper end of the dust discharge duct opens adjacent the positions of the leads.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: February 13, 1996
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventors: Ryuichi Nakamura, Kazunori Nakano
  • Patent number: 5374201
    Abstract: A socket for an electric part having a body; a plurality of contacts arranged in an array on the body and adapted to be contacted with contact pieces on the electric part when the electric part is inserted into the socket the contacts each having a contacting portion adapted to engage in pressure contact with a corresponding contact piece, a spring portion for exerting a contact pressure on the contacting portion, and a hook-shaped retaining portion and an operating member having an acting portion over which the hook-shaped retaining portions are hooked in sliding engagement with the acting portion and movably mounted on the socket body for moving the retaining portions to cause the contacting portions to be shifted away from the contact pieces of the electric part against the resilient force of the spring portions, the acting portion having retaining element damping walls thereon spaced along the acting portion at intervals greater than the thickness of the retaining portions of the contacts and separating a
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: December 20, 1994
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventor: Ryuichi Nakamura
  • Patent number: 5320550
    Abstract: A connector for an electric part having a contact shutter device for forming an open state or a closed state of a contact, comprising a finger-like latch member able to be engaged with and disengaged from an electric part, the finger-like latch member being operatively connected to an action of the contact shutter device for displacing a contact in an open state in order to be disengaged from the electric part, the finger-like latch member being operatively connected to an action of the contact shutter device for displacing the contact in a closed state in order to be engaged with the electric part.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: June 14, 1994
    Assignee: Yamaichi Electric Co., Ltd.
    Inventors: Kazumi Uratsuji, Ryuichi Nakamura, Noriyuki Matsuoka
  • Patent number: 5299267
    Abstract: Apparatus to widely change the control amount used for of mixing control in an audio mixer and to momentarily change a knob to a desired setting can be reproduced by selecting a mode in which the control amount for controlling the mixing of audio signals is continuously output and a mode in which the temporarily the stored control amount is output.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: March 29, 1994
    Assignee: Sony Corporation
    Inventor: Ryuichi Nakamura
  • Patent number: 4720742
    Abstract: A semiconductor device carrier includes a carrier substrate having an open section in which a semiconductor device is accommodated, and a retaining member slidably coupled to the carrier substrate which linearly recriprocates on a surface of the carrier substrate having the open section and which is provided with a retaining element adapted to retain the semiconductor device accommodated within the open section of the carrier substrate when the retaining member has moved in one direction and to release the retention of the semiconductor device when the retaining member has moved in the other direction.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: January 19, 1988
    Assignee: Yamaichi Electric Mfg. Co., Ltd.
    Inventors: Yoshinori Egawa, Ryuichi Nakamura
  • Patent number: 4615441
    Abstract: An IC package carrier comprises an IC package support plate having a square IC package accommodation section at the center thereof; an IC package press plate having at one end thereof a handle section for causing the IC package press plate to rise from and lie down on the upper surface of the IC package support plate, at the center thereof a square press section for pressing a square IC package, at the other end thereof a hinge mechanism for coupling the IC package press plate to the IC package support plate and serving as hinges about which the IC package press plate is rotated, and two pairs of arms, one pair for connecting the handle section to the square press section and being superposed on one pair of adjacent corners of the IC package accommodated within the square IC package accommodation section of the IC package support plate and the other pair for connecting the square press section to the hinge mechanism and being superposed on the other pair of adjacent corners of the IC package; and closure reta
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: October 7, 1986
    Assignee: Yamaichi Electric Mfg. Co., Ltd.
    Inventor: Ryuichi Nakamura
  • Patent number: 4427641
    Abstract: In preparing wet process phosphoric acid by decomposing a phosphate rock containing uranium with sulfuric acid and phosphoric acid on condition that hemihydrate gypsum is formed in an acid solution either at the stage of decomposing the phosphate rock or subsequently, uranium contained in the phosphate rock can almost entirely be retained in the obtained phosphoric acid solution by forming the hemihydrate gypsum in the presence of an oxidizing agent, such as a soluble chlorate, hydrogen peroxide or oxygen gas, in the acid solution in a quantity sufficient to render the entire uranium dissolved in the acid solution hexavalent because hemihydrate gypsum adsorbs almost exclusively tetravalent ions of uranium. The uranium is then recovered.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: January 24, 1984
    Assignee: Central Glass Company Limited
    Inventors: Seizi Yoshikawa, Ryuichi Nakamura
  • Patent number: 4217299
    Abstract: A method for the conversion of an unsaturated compound having a functional group, characterized by contacting [1] at least one compound selected from the group consisting of carboxylic acid esters, nitriles, ketones, amides, and ethers and having a carbon-to-carbon double bond and no unsaturation at the position conjugate to said double bond, or a mixture of said compound [1] and [2] at least one compound selected from the group consisting of ethylenically unsaturated compounds having a carbon-to-carbon double bond and neither unsaturation at the position conjugate to said double bond nor a functional group, with a catalyst system consisting essentially of a combination of (A) at least one member selected from the group consisting of tungsten compounds, molybdenum compounds, and rhenium compounds, with (B) at least one organoaluminum compound having at least one carbon-to-aluminum bond.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: August 12, 1980
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Ryuichi Nakamura, Seiji Fukuhara, Shuichi Matsumoto, Koei Komatsu
  • Patent number: 4011386
    Abstract: Novel polymers or copolymers of norbornene-carboxylic acid amides can be obtained by contacting, in the presence or absence of an inert solvent, (I) at least one compound selected from the group consisting of 5-norbornene-2-carboxylic acid amide, 5-norbornene-2,3-dicarboxylic acid diamide and substituted derivatives thereof, or (II) a mixture of the said compound (I) with at least one compound selected from the group consisting of norbornenes having at least one substituent selected from the group consisting of ester groups, nitrile groups, esterified hydroxyl groups, acid imide groups, halogens and acid anhydride groups and cyclic olefins, with a catalyst composed of (a) at least one compound selected from the group consisting of compounds of W, Mo and Re and (b) at least one compound selected from the group consisting of compounds of elements of Groups IA, IIA, IIB, IIIA, IVA and IVB of the Deming Periodic Table, said compounds having at least one element-carbon bond or element-hydrogen bond.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: March 8, 1977
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Shuichi Matsumoto, Ryuichi Nakamura, Seiji Fukuhara, Kazuo Suzuki, Koei Komatsu
  • Patent number: 3974196
    Abstract: A method for the conversion of an unsaturated compound having a functional group, characterized by contacting [1] at least one compound selected from the group consisting of carboxylic acid esters, nitriles, ketones, amides, and ethers and having a carbon-to-carbon double bond and no unsaturation at the position conjugate to said double bond, or a mixture of said compound [1] and [2] at least one compound selected from the group consisting of ethylenically unsaturated compounds having a carbon-to-carbon double bond and neither unsaturation at the position conjugate to said double bond nor a functional group, with a catalyst system consisting essentially of a combination of (A) at least one member selected from the group consisting of tungsten compounds, molybdenum compounds, and rhenium compounds, with (B) at least one organolaluminum compound having at least one carbon-to-aluminum bond.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: August 10, 1976
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Ryuichi Nakamura, Seiji Fukuhara, Shuichi Matsumoto, Koei Komatsu