Patents by Inventor Keizo Shida

Keizo Shida 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).

  • Slow-release composite and process for producing the same
    Patent number: 4800085
    Abstract: A slow-release composite having pyroglutamyl-histidyl-triptophyl-seryl- tyrosyl-D-leucyl-leucyl-arginyl-proline ethylamide or a salt thereof encapsulated in a polymer matrix and a process the same are herein disclosed.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: January 24, 1989
    Assignees: Japan Atomic Energy Research Institute, Keizo Shida, Takeda Chemical Indus. Ltd.
    Inventors: Masaru Yoshida, Masaharu Asano, Isao Kaetsu, Katsuyuki Nakai, Hidetoshi Yamanaka, Keizo Shida, Akira Shiraishi
  • Slow-release composite and process for producing the same
    Patent number: 4652443
    Abstract: A slow-release composite having pyroglutamyl-histidyl-triptophyl-seryl-tyrosyl-D-leucyl-leucyl-arginyl-pro line ethylamide or a salt thereof encapsulated in a polymer matrix and a process the same are herein disclosed.
    Type: Grant
    Filed: May 22, 1984
    Date of Patent: March 24, 1987
    Assignees: Japan Atomic Energy Research Institute, Keizo Shida, Takeda Chemical Industries, Ltd.
    Inventors: Masaru Yoshida, Masaharu Asano, Isao Kaetsu, Katsuyuki Nakai, Hidetoshi Yamanaka, Keizo Shida, Akira Shiraishi
  • Process for preparing Estracyt compounds having a carcinostatic bound thereto
    Patent number: 4584136
    Abstract: An Estracyt compound having a carcinostatic bound thereto is obtained by reacting an Estracyt compound with a carcinostatic having one or more radicals selected from among COOH, Cl, NH.sub.2 and OH, either directly or after reaction with an amine to replace one or both Cl groups in the nitrogen mustard portion in the Estracyt compound with a NH.sub.2 group, in the presence or absence of a catalyst. The resulting compound is more effective in cancer control than the Estracyt compound associated substance.
    Type: Grant
    Filed: March 1, 1985
    Date of Patent: April 22, 1986
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaru Yoshida, Masaharu Asano, Isao Kaetsu, Hidetoshi Yamanaka, Katsuyuki Nakai, Hisako Yuasa, Keizo Shida