Patents by Inventor Hideki Shirakawa

Hideki Shirakawa 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: 6846580
    Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by is put between a lower electrode and an upper electrode. Where, in the above chemical formula, Ar1, Ar2 denote a allylene group respectively, R1, R2, R3, R4 denote a substituent respectively, and n denotes a copolymerization ratio. Accordingly, the flatness of the luminous layer can be improved and the solubility of the luminous layer constituent material can be enhanced.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: January 25, 2005
    Assignee: Fujitsu Limited
    Inventors: Kota Yoshikawa, Masashi Kijima, Hideki Shirakawa, Ikuo Kinoshita
  • Publication number: 20040155577
    Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by 1
    Type: Application
    Filed: February 9, 2004
    Publication date: August 12, 2004
    Applicant: Fujitsu Limited
    Inventors: Kota Yoshikawa, Masashi Kijima, Hideki Shirakawa, Ikuo Kinoshita
  • Publication number: 20020001734
    Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by 1
    Type: Application
    Filed: April 26, 2001
    Publication date: January 3, 2002
    Inventors: Kota Yoshikawa, Masashi Kijima, Hideki Shirakawa, Ikuo Kinoshita
  • Patent number: 5216102
    Abstract: The present invention provides a process for producing a polyacetylene.In the present process for producing a polyacetylene, acetylene is polymerized with a Ziegler-Natta catalyst consisting of a trialkylaluminum and an alkyl titanate, wherein there is used, as the trialkylaluminum, a trialkylaluminum having an alkyl group of 6 or more carbon atoms, or, as the alkyl titanate, an alkyl titanate having an alkyl group of 6 or more carbon atoms.The polyacetylene obtained according to the present invention is superior in mechanical properties, particularly stretchability.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: June 1, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mamoru Soga, Shu Hotta, Nobuo Sonoda, Hideki Shirakawa, Kazuo Akagi
  • Patent number: 4596852
    Abstract: Process for molding an acetylene high polymer by press-forming a gel-like composition composed of 5 to 95% by weight of an acetylene high polymer having a fibril structure and 95 to 5% by weight of an organic solvent.
    Type: Grant
    Filed: July 12, 1985
    Date of Patent: June 24, 1986
    Assignee: Showa Denko K.K.
    Inventors: Yukio Kobayashi, Hideki Shirakawa, Sakuji Ikeda
  • Patent number: 4594180
    Abstract: This invention relates to a process for producing an organic semiconductor. More specifically, it relates to a process for producing an electrically conductive acetylene high polymer, which comprises doping an acetylene high polymer having a fibrous microcrystalline (fibril) structure with a specified electron acceptor compound, having low toxicity, to obtain an electrically conductive acetylene high polymer having an increased electrical conductivity, and flexibility and heat stability. The electrically conductive acetylene high polymer obtained by the process of this invention is a P-type semiconductor whose electrical conductivity can be freely controlled within the range of 10.sup.-9 to 10.sup.3 ohm.sup.-1.cm.sup.-1, and is useful as a material for photoelectric converter elements such as solar cells and photosensers, and as P-N hetero junction elements.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: June 10, 1986
    Assignee: Showa Denko K.K.
    Inventors: Yukio Kobayashi, Hideki Shirakawa, Sakuji Ikeda
  • Patent number: 4487709
    Abstract: This invention relates to a process for producing an organic semiconductor. More specifically, it relates to a process for producing an electrically conductive acetylene high polymer, which comprises doping an acetylene high polymer having a fibrous microcrystalline (fibril) structure with a specified electron acceptor compound having low toxicity, to obtain an electrically conductive acetylene high polymer having an increased electrical conductivity, and flexibility and heat stability. The electrically conductive acetylene high polymer obtained by the process of this invention is a P-type semiconductor whose electrical conductivity can be freely controlled within the range of 10.sup.-9 to 10.sup.3 ohm.sup.-1, cm.sup.-1, and is useful as a material for photoelectric converter elements such as solar cells and photosensers, and as P-N hetero junction elements.
    Type: Grant
    Filed: November 29, 1980
    Date of Patent: December 11, 1984
    Assignee: Showa Denko K.K.
    Inventors: Yukio Kobayashi, Hideki Shirakawa, Sakuji Ikeda
  • Patent number: 4452959
    Abstract: Process for producing easily moldable composition of an acetylene high polymer by polymerizing acetylene using a catalyst system composed of (A) a transition metal compound containing at least one transition metal from Groups IVa, Va, VIa and VIII and (B) an organometallic compound containing at least one metal from Groups IIa, IIb, IIIb and IVb, the polymerization being carried out in a polymerization solvent containing the transition metal compound in a concentration of 0.0001 to 0.1 mole/liter to form a gel-like material consisting of an acetylene high polymer having a fibrous microcrystalline structure and the polymerization solvent.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: June 5, 1984
    Assignee: Showa Denko K.K.
    Inventors: Yukio Kobayashi, Hideki Shirakawa, Sakuji Ikeda
  • Patent number: 4410640
    Abstract: Process for producing a porous acetylene high polymer by lyophilizing a gel-like composition composed of 1 part by weight of an acetylene high polymer having a fibril structure and 1 to 1,000 parts by weight of an organic solvent.
    Type: Grant
    Filed: September 11, 1981
    Date of Patent: October 18, 1983
    Assignee: Showa Denko K.K.
    Inventors: Yukio Kobayashi, Hideki Shirakawa, Sakuji Ikeda
  • Patent number: 4222903
    Abstract: Electrically conducting organic polymeric material having a preselected room temperature p-type electrical conductivity which may vary over the entire range characteristic of semiconductor behavior and into the range characteristic of metallic behavior, is prepared by controlled chemical doping of polyacetylene in the form of a polycrystalline film. Exceptionally high room temperature p-type electrical conductivity within the range of from about 0.1 to of the order of 10.sup.3 ohm.sup.-1 cm.sup.-1 is achieved with several electron acceptor dopants, including bromine, iodine, iodine chloride, iodine bromide and arsenic pentafluoride.
    Type: Grant
    Filed: May 4, 1978
    Date of Patent: September 16, 1980
    Assignee: University Patents, Inc.
    Inventors: Alan J. Heeger, Alan G. MacDiarmid, Chwan K. Chiang, Hideki Shirakawa
  • Patent number: 3933770
    Abstract: There is provided a method of preparing transition metal complex catalysts combined with organic high polymers.
    Type: Grant
    Filed: March 20, 1974
    Date of Patent: January 20, 1976
    Assignee: Tokyo Institute of Technology
    Inventors: Sakuji Ikeda, Atsumu Ozaki, Makoto Okawara, Tsutomu Mizoroki, Masahiro Uchino, Hideki Shirakawa, Noboru Kawata