Patents by Inventor Jun Nakano

Jun Nakano 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).

  • 3-(Tetrazol-5-yl), 4-methyl-8-alkoxy coumarins and anti-allergic compositions thereof
    Patent number: 4363812
    Abstract: Coumarin derivatives of the general formula: ##STR1## wherein R is hydrogen atom, an alkyl group or an alkenyl group, R.sup.1 is hydrogen atom, an alkyl group, an alkenyl group or an alkoxy group, and the OR and R.sup.1 groups each are substituted at any of the 5, 6, 7 and 8 positions of the coumarin ring, and the salt thereof. The compounds are useful as antiallergic agent for preventing and treating allergic diseases.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: December 14, 1982
    Assignee: Kakenyaku Kako Co., Ltd.
    Inventors: Kiyoshi Kuriyama, Jun Nakano, Kiyonosin Itikawa, Kiyoshi Ito, Yuji Suzuki, Katsuro Ishizuki