Patents by Inventor Toshiaki Tateiwa

Toshiaki Tateiwa 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).

  • Phosphor composition, phosphor-coating composition, discharge lamp, and preparation method thereof
    Patent number: 5523018
    Abstract: A phosphor composition contains phosphor particles and a water-soluble rare earth compound uniformly covering the surfaces of the phosphor particles. The rare earth compound is present in an amount of from 0.001 to 5% by weight in terms of the corresponding rare earth oxide, based on the weight of the phosphor particles.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: June 4, 1996
    Assignee: Nichia Kagaku Kogyo K.K.
    Inventors: Kouichi Okada, Toshiaki Tateiwa, Tetsuya Sadamoto, Yoshihito Hario, Yuji Itsuki, Masato Fujiwara, Osamu Sakai, Kenji Fujino
  • Phosphor composition, phosphor-coating composition, discharge lamp and preparation method thereof
    Patent number: 5433888
    Abstract: A phosphor composition contains phosphor particles and a water-soluble rare earth compound uniformly covering the surfaces of the phosphor particles. The rare earth compound is present in an amount of from 0.001 to 5% by weight in terms of the corresponding rare earth oxide, based on the weight of the phosphor particles.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: July 18, 1995
    Assignee: Nichia Kagaku Kogyo, K.K.
    Inventors: Kouichi Okada, Toshiaki Tateiwa, Tetsuya Sadamoto, Yoshihito Hario, Yuji Itsuki, Masato Fujiwara, Osamu Sakai, Kenji Fujino
  • Phosphor coating composition, and discharge lamp
    Patent number: 5417886
    Abstract: A phosphor-coating composition contains phosphor particles, particles of a rare earth compound, a binder, and a dispersing medium. The rare earth compound is present in an amount of 0.001 to 5% by weight in terms of the corresponding oxide.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: May 23, 1995
    Assignee: Nichia Kagaku Kogyo K.K.
    Inventors: Toshiaki Tateiwa, Kouichi Okada, Tetsuya Sadamoto, Yoshihito Hario