Patents by Inventor Atsuko Ogawa

Atsuko Ogawa 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: 7531114
    Abstract: Disclosed is a novel technology, by which carbon nanotubes can be easily worked without degrading the characteristic properties thereof. A gel composition including a carbon nanotube and an ionic liquid is produced by pulverizing, in the presence of the ionic liquid, the carbon nanotube by applying a shearing force thereto, and then, if needed, subjecting the product of the pulverization to centrifugal separation. The gel composition exhibits an excellent workability and can be worked simply by forming a desired shape by subjecting the composition in a fluidized state to application of an external force by such an operation as a printing, coating, extrusion or injection operation, and then removing the ionic liquid with a solvent or an absorbent.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: May 12, 2009
    Assignee: Japan Science and Technology Agency
    Inventors: Takanori Fukushima, Atsuko Ogawa, Takuzo Aida
  • Patent number: 7315106
    Abstract: An actuator element which functions stably in air and in vacuo, and can be driven at low voltages is described. A actuator element which includes at least two electrode layers, each of which is mutually insulated and comprises a gel composition comprising carbon nanotubes, an ionic liquid and a polymer, are formed on the surface of ion-conductive layer comprising a gel composition comprising an ionic liquid and a polymer, so that the actuator element is capable of being flexed or deformed by creating a potential difference between the electrode layers; and an actuator element wherein at least two electrode layers, each of which is mutually insulated, are formed on the surface of ion-conductive layer, conductive layer is formed on the surface of each electrode layer, and the actuator element is capable of being flexed or deformed by creating a potential difference between the conductive layers.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: January 1, 2008
    Assignees: Japan Science and Technology Agency, National Institute of Advanced Industrial Science and Technology
    Inventors: Kinji Asaka, Takanori Fukushima, Takuzo Aida, Atsuko Ogawa
  • Publication number: 20060266981
    Abstract: The present invention provides an actuator element which functions stably in air and in vacuo, and can be driven at low voltages. The present invention provides an actuator element wherein at least two electrode layers 2, each of which is mutually insulated and comprises a gel composition comprising carbon nanotubes, an ionic liquid and a polymer, are formed on the surface of ion-conductive layer 1 comprising a gel composition comprising an ionic liquid and a polymer, so that the actuator element is capable of being flexed or deformed by creating a potential difference between the electrode layers; and an actuator element wherein at least two electrode layers 2, each of which is mutually insulated, are formed on the surface of ion-conductive layer 1, conductive layer 3 is formed on the surface of each electrode layer 2, and the actuator element is capable of being flexed or deformed by creating a potential difference between the conductive layers.
    Type: Application
    Filed: December 3, 2004
    Publication date: November 30, 2006
    Inventors: Kinji Asaka, Takanori Fukushima, Takuzo Ogawa, Atsuko Ogawa
  • Publication number: 20050156144
    Abstract: Disclosed is a novel technology, by which carbon nanotubes can be easily worked without degrading the characteristic properties thereof A gel composition comprising a carbon nanotube and an ionic liquid is produced by pulverizing, in the presence of the ionic liquid, the carbon nanotube by applying a shearing force thereto, and then, if needed, subjecting the product of the pulverization to centrifugal separation. The gel composition exhibits an excellent workability and can be worked simply by forming a desired shape by subjecting the composition in a fluidized state to application of an external force by such an operation as a printing, coating, extrusion or injection operation, and then removing the ionic liquid with a solvent or an absorbent.
    Type: Application
    Filed: October 15, 2003
    Publication date: July 21, 2005
    Inventors: Takanori Fukushima, Atsuko Ogawa, Takuzo Aida
  • Patent number: 6858676
    Abstract: The present invention relates to an olefin derived copolymer and a thermoplastic resin composition using the olefin derived copolymer satisfying the following (1) and (2): (1) tensile strength at break measured based on JIS K6251 is 2.0 or less MPa; and (2) tensile elongation at break EB (%) of a resin composition obtained satisfies the following relational expression (expression 1) and (expression 2), when blended with a polypropylene derived resin that has 20 degree C. xylene soluble component of not more than 20 wt %. R[3/5]?R[2/6]?0.15??(expression 1) S[2/6]??800??(expression 2) (R[3/5] and R[2/6] are obtained by the following methods: a curve is obtained by plotting tensile elongation at break EB (%) (based on JIS K6251) of resin composition taken as vertical axis, and weight part rate Pa of a content of an olefin derived copolymer contained in a resin composition taken as horizontal axis; a multiple regression curve in section regions of Pa=0.30-0.50 and Pa=0.20-0.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: February 22, 2005
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Hirofumi Johoji, Hidetake Hozumi, Atsuko Ogawa, Tadaaki Nishiyama
  • Patent number: 6773808
    Abstract: There is provided an adhesive film comprising: (i) a substrate layer, which comprises a thermoplastic resin, and (ii) an adhesive layer, which comprises an olefin copolymer, wherein the olefin copolymer comprises polymerization units of at least two olefins selected from the group consisting of ethylene and &agr;-olefins having 3 to 20 carbon atoms, and the olefin copolymer satisfies the requirements: (a) the olefin copolymer has neither a peak of crystal melting calorie of not less than 1 J/g, nor a peak of crystallization calorie of not less than 1 J/g in a differential scanning calorimetry according to JIS K 7122, and (b) a molecular weight distribution of the olefin copolymer, Mw/Mn, is not more than 3.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: August 10, 2004
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Atsuko Ogawa, Akihiro Ichige, Hidetake Hozumi
  • Publication number: 20040097650
    Abstract: A thermoplastic elastomer composition comprising the following components (A) and (B), wherein a weight ratio of the component (A)/the component (B) is from 5/95 to 95/5:
    Type: Application
    Filed: September 5, 2003
    Publication date: May 20, 2004
    Inventors: Atsuko Ogawa, Tadaaki Nishiyama, Hidetake Hozumi
  • Publication number: 20020164491
    Abstract: There is provided an adhesive film comprising:
    Type: Application
    Filed: January 24, 2002
    Publication date: November 7, 2002
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Atsuko Ogawa, Akihiro Ichige, Hidetake Hozumi
  • Patent number: 6391974
    Abstract: A pressure-sensitive adhesive comprising an olefin-based copolymer wherein (1) the olefin-based copolymer has a tensile strength at break measured according to JIS K 6251 of 2.0 MPa or less, and (2) the elongation at break EB(%) of a resin composition obtained in blending the olefin-based copolymer with a polypropylene-based resin having a 20° C. xylene-soluble component content of 20 wt % or less satisfies the following formula 1: S[2/6]≧−800, wherein S[2/6] represents the gradient of a primary straight line, and Pa represents the weight content proportion of the olefin-based copolymer contained in the resin composition.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: May 21, 2002
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Atsuko Ogawa, Tatsuo Sassa, Hirofumi Jyouhouji, Hidetake Hozumi
  • Patent number: 6300447
    Abstract: An ethylene-&agr;-olefin-nonconjugated polyene random copolymer obtained by polymerizing the following components (a), (b) and (c) in the presence of a catalyst comprising a transition metal complex having at least one cyclopentadienyl skeleton and satisfying the conditions (1), (2), (3) and (4): (a) ethylene, (b) &agr;-olefin having 3 to 20 carbon atoms, and (c) one or more nonconjugated polyene at least containing a nonconjugated polyene in which at least one or more hydrogen atoms are respectively bound to all of carbon atoms having a double bond; (1) the molar ratio of a unit derived from ethylene to a unit derived from &agr;-olefin in the copolymer is 95/5 to 20/80, (2) the iodine value is 0 to 50 (g/100 g polymer), (3) the intrinsic viscosity [&eegr;] measured in xylene at 70° C. is 0.5 to 10 dl/g, and (4) the Q value (weight average molecular weight/number average molecular weight) measured by gel permeation chromatography (GPC) is 3.0 or more.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: October 9, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hirofumi Johoji, Toshiyuki Kuwabara, Atsuko Ogawa
  • Patent number: 6288191
    Abstract: The present invention relates to an ethylene-isoprene random copolymer having an isoprene content of about 1 to 45% by mole, or an ethylene-isoprene copolymer having a Q-value of about 3.5 or less, wherein the Q-value is a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) The copolymer may be made using a catalyst comprising a compound of formula I, II or III, wherein M1 is a group IV transition metal, J is a group XIV atom, A and X3 are group XVI atoms, and Cp1 is a cyclopentadienyl-type group.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: September 11, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tadaaki Nishiyama, Atsuko Ogawa