Patents by Inventor Fumiko Yokotani

Fumiko Yokotani 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: 5876891
    Abstract: An alternating copolymer comprising a repeating unit of the formula:--Z--(X--Y).sub.n-- (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: March 2, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
  • Patent number: 5654367
    Abstract: An alternating copolymer comprising a repeating unit of the formula:--Z--(X--Y).sub.n -- (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: August 5, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
  • Patent number: 5597889
    Abstract: An alternating copolymer comprising a repeating unit of the formula:--Z--(X-Y).sub.n -- (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: January 28, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
  • Patent number: 5486442
    Abstract: An alternating copolymer comprising a repeating unit of the formula:-Z-(X-Y).sub.n - (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.
    Type: Grant
    Filed: July 13, 1993
    Date of Patent: January 23, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
  • Patent number: 4989954
    Abstract: A projection type liquid crystal display device for transmitting three color light beams of RGB through three TN type liquid crystal panels and projecting the transmitted light beams optimizes the RGB transmission characteristics by changing the crossing angles of the polarization axes of a polarizer and an analyzer with respect to the orientation directions of the respective RGB TN cells in specified directions, and also a projection type liquid crystal display device for transmitting a light beam through a TN type liquid crystal panel and projecting the transmitted light beam effects temperature-compensation of the transmission characteristics of the liquid crystal panels by controlling the crossing angle of the polarization axes of a polarizer and an analyzer.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: February 5, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuo Yokoyama, Junichi Asada, Hiroshi Watanabe, Shoichi Ishihara, Sadayoshi Hotta, Fumiko Yokotani, Yoshihiro Matsuo
  • Patent number: 4595516
    Abstract: A heat storage material comprising a system consisting of sodium acetate and water incorporated with a fluorine ion-containing salt which is in solid state at the crystallizing temperature of sodium acetate trihydrate, as a nucleating agent for sodium acetate trihydrate.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: June 17, 1986
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takahiro Wada, Fumiko Yokotani, Yoshihiro Matsuo, Hiroshi Yoneno
  • Patent number: 4561989
    Abstract: A heat storage material comprises a sodium acetate-water system containing at least 53-69% by weight sodium acetate (CH.sub.3 CO.sub.2 Na), wherein said heat storage material is mixed with a thickener comprising polyvinyl alcohol, paraffin and one or two components selected from the group consisting of formaldehyde and acetone, and has stable performance and little change of heat storage capacity even under repeated storage and release of heat.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: December 31, 1985
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takahiro Wada, Ryoichi Yamamoto, Fumiko Yokotani