Patents by Inventor Toshiro Hiraoka

Toshiro Hiraoka 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).

  • Glass composite material, precursor thereof, nitrogen-containing composite material and optical device
    Patent number: 5717051
    Abstract: A glass composite material comprising a polymer chain selected from the group consisting of polysilane, polygermane, polystannane and a copolymer thereof, and a network structure of a metal oxide consisting of a metal atom bonded to the other metal atom through an oxygen atom, wherein the polymer chain is chemically crosslinked with a glass matrix of the network structure of the metal oxide directly or indirectly, and a volume resistivity measured by setting a ratio of a voltage to a film thickness at 10.sup.6 V/cm according to a disc plate electrode method is not more than 3.times.10.sup.6 .OMEGA.cm.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: February 10, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiro Hiraoka, Yutaka Majima, Kenji Todori, Julian R. Koe, Yoshihiko Nakano, Shinji Murai, Shuzi Hayase
  • Non-linear optical devices employing a polysilane composition and a polysilane composition therefor
    Patent number: 5565041
    Abstract: A polysilane composition containing conductor or semiconductor particles useful as a portion of a non-linear optical device.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: October 15, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiro Hiraoka, Shin-ichi Nakamura, Yoshihiko Nakano, Shinji Murai, Shuzi Hayase
  • Non-linear optical devices employing a polysilane composition and a polysilane composition therefor
    Patent number: 5530956
    Abstract: A non-linear optical device is disclosed, which comprises an optical waveguide complex wherein a part of the waveguide complex is formed of a non-linear element containing a polysilane having an average weight of 5,000 to 1,000,000 and having a repeating unit represented by formula ##STR1## Where R.sup.1 and R.sup.2 are independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted aralkyl group, and particles having a particle size of 10 to 500 .ANG. selected from the group consisting of conductors, semiconductors, and mixture thereof.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: June 25, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiro Hiraoka, Shin-ichi Nakamura, Yoshihiko Nakano, Shinji Murai, Shuzi Hayase
  • Non-linear optical devices employing a polysilane composition and a polysilane composition therefor
    Patent number: 5482656
    Abstract: A polysilane composition containing conductor or semiconductor particles useful as a portion of a non-linear optical device.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: January 9, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiro Hiraoka, Shin-ichi Nakamura, Yoshihiko Nakano, Shinji Murai, Shuzi Hayase