Patents by Inventor Ryousuke Touyama

Ryousuke Touyama 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).

  • Novel nitrogen-containing monoterpene derivatives
    Patent number: 4347356
    Abstract: Novel nitrogen-containing monoterpene derivatives having pyrindine skeleton and dimers, trimers and higher polymers thereof as low toxic and efficient dyestuffs. Their pharmacological effects are expected.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: August 31, 1982
    Assignee: Taito Co., Ltd.
    Inventors: Ryousuke Touyama, Hiroyuki Inouye, Tetsuro Shingu, Yoshio Takeda, Takeshi Ikumoto, Hidetoshi Okuyama, Osamu Yamamoto
  • Nitrogen-containing monoterpene derivatives
    Patent number: 4232159
    Abstract: Novel nitrogen-containing monoterpene derivatives having pyrindine skeleton synthesized by, for example, substitution of an oxygen atom in an iridoid skeleton for a nitrogen atom as low toxic and efficient dyestuffs. Their pharmacological effects are expected.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: November 4, 1980
    Assignee: Taito Co., Ltd.
    Inventors: Ryousuke Touyama, Hiroyuki Inouye, Tetsuro Shingu, Yoshio Takeda, Takeshi Ikumoto, Hidetoshi Okuyama, Osamu Yamamoto