Patents by Inventor Koichi Ishiyama

Koichi Ishiyama 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).

  • Adenosine and guanosine-3'-5'-cyclic methylphosphonate derivatives
    Patent number: 5559102
    Abstract: Cyclic AMP and cyclic GMP derivatives, such as 8-bromoadenosine-3', 5'-cyclic methylphosphonate, are effective in inhibiting phosphodiesterases.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: September 24, 1996
    Assignee: Nippon Shinyaku Company, Limited
    Inventors: Junichi Yano, Tadaaki Ohgi, Koichi Ishiyama, Kazuko Hirabayashi
  • Method for treating and rinsing metal articles
    Patent number: 3979220
    Abstract: Metal articles are sequentially treated in a surface-treatment tank containing a solution of surface-treating agents, then rinsed in a plurality of series-connected water-washing tanks.The contents of the surface-treatment tank and water-washing tanks are cycled to a concentrator by way of a heat exchanger and concentrated solution is returned to the surface-treatment tank. Steam is condensed in the heat exchanger to cause evaporation of water in the concentrator and the steam condensate is transferred to the water-washing tanks.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: September 7, 1976
    Assignee: Ebara Udylite Kabushiki Kaisha
    Inventors: Koichi Ishiyama, Yuji Sakata, Ikuo Wada