Patents by Inventor Hironobu Nagou

Hironobu Nagou 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).

  • Chromene compound
    Patent number: 6719926
    Abstract: A chromene compound which develops yellow to red color, a high color density and a little initial color and which, when used in combination with an existing photochromic compound that exhibits blue color so as to develop a neutral tint, maintains uniformity in the color tone at the time of developing color or fading color, or exhibits a very large color fading rate.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: April 13, 2004
    Assignee: Tokuyama Corporation
    Inventors: Junji Momoda, Shingo Matsuoka, Hironobu Nagou
  • Curable composition and photochromic cured article
    Patent number: 6698883
    Abstract: A photochromic cured product exhibiting excellent photochromic properties such as a high color density and a high fading rate, as well as excellent base material properties such as a high hardness and a large heat resistance.
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: March 2, 2004
    Assignee: Tokuyama Corporation
    Inventors: Junji Momoda, Hironobu Nagou, Toshiaki Otani
  • Chromene compound
    Publication number: 20030195340
    Abstract: A chromene compound which develops yellow to red color, a high color density and a little initial color and which, when used in combination with an existing photochromic compound that exhibits blue color so as to develop a neutral tint, maintains uniformity in the color tone at the time of developing color or fading color, or exhibits a very large color fading rate.
    Type: Application
    Filed: February 19, 2002
    Publication date: October 16, 2003
    Inventors: Junji Momoda, Shingo Matsuoka, Hironobu Nagou
  • Chromene compound
    Patent number: 6525194
    Abstract: A chromene compound which develops yellow to red color, a high color density and a little initial color and which, when used in combination with an existing photochromic compound that exhibits blue color so as to develop a neutral tint, maintains uniformity in the color tone at the time of developing color or fading color, or exhibits a very large color fading rate.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: February 25, 2003
    Assignee: Tokuyama Corporation
    Inventors: Junji Momoda, Shingo Matsuoka, Hironobu Nagou
  • Chromene compound
    Publication number: 20030028019
    Abstract: A chromene compound which develops yellow to red color, a high color density and a little initial color and which, when used in combination with an existing photochromic compound that exhibits blue color so as to develop a neutral tint, maintains uniformity in the color tone at the time of developing color or fading color, or exhibits a very large color fading rate.
    Type: Application
    Filed: May 24, 2002
    Publication date: February 6, 2003
    Inventors: Junji Momoda, Shingo Matsuoka, Hironobu Nagou
  • Curable composition and photochromic cured article
    Publication number: 20030008958
    Abstract: A photochromic cured product exhibiting excellent photochromic properties such as a high color density and a high fading rate, as well as excellent base material properties such as a high hardness and a large heat resistance.
    Type: Application
    Filed: April 15, 2002
    Publication date: January 9, 2003
    Inventors: Junji Momoda, Hironobu Nagou, Toshiaki Otani