Patents by Inventor Izumi Yanagihara

Izumi Yanagihara 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).

  • N-substituted heterocyclic derivatives and preparation thereof
    Patent number: 4080328
    Abstract: Novel N-substituted heterocyclic derivatives represented by the formula, ##STR1## wherein R is hydrogen or lower alkanoyl; R.sub.1 is hydrogen, lower alkyl, lower alkoxy, halogen, nitro, trifluoromethyl, amino or N-lower alkanoylamino; R.sub.2 is hydrogen, halogen, amino or N-lower alkanoylamino; W is oxygen, sulfur, sulfinyl or sulfonyl; and Y is ##STR2## (wherein R.sub.3 is hydrogen, lower alkyl or lower alkanoyl; and R.sub.4 is hydrogen, halogen or lower alkyl), and pharmaceutically acceptable salts thereof, which have excellent anti-inflammatory, analgesic, sedative, anti-convulsive or anti-hypertensive activities.
    Type: Grant
    Filed: June 28, 1974
    Date of Patent: March 21, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Izumi Yanagihara, Hisao Yamamoto