Patents by Inventor Suguru Nagae

Suguru Nagae 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).

  • Photochromic material and rewritable optical recording medium
    Patent number: 5234799
    Abstract: A photochromic material containing a copolymer of a spirobenzothiopyran derivative prepolymer and a liquid crystal prepolymer. In addition, a rewritable optical recording medium using the photochromic material. A rewritable optical recording medium obtained by coating a dispersed material, which is obtained by uniformly dispersing a spirobenzothiopyran derivative compound in a thermoplastic resin, on a substrate. A photochromic material capable of controlling a colored state and a decolorized state in a photon mode or a heat mode using an ultraviolet light source and a near-infrared light source. A rewritable optical recording medium capable of rewriting an information in a photon mode using a semiconductor laser.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: August 10, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Suguru Nagae, Sei Tsuroda, Kenji Nomura, Kazuhiko Tsutsumi, Yoshiyuki Nakaki
  • Photochromic material and rewritable optical recording medium
    Patent number: 5164287
    Abstract: A photochromic material containing a copolymer of a spirobenzothiopyran derivative prepolymer and a liquid crystal prepolymer. In addition, a rewritable optical recording medium using the photochromic material. A rewritable optical recording medium obtained by coating a dispersed material, which is obtained by uniformly dispersing a spirobenzothiopyran derivative compound in a thermoplastic resin, on a substrate. A photochromic material capable of controlling a colored state and a decolorized state in a photon mode or a heat mode using an ultraviolet light source and a near-infrared light source. A rewritable optical recording medium capable of rewriting an information in a photon mode using a semiconductor laser.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: November 17, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Suguru Nagae, Sei Tsunoda, Kenji Nomura, Kazuhiko Tsutsumi, Yoshiyuki Nakaki