Patents by Inventor Shuya Shimada

Shuya Shimada 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).

  • Heterocyclic containing 5-oxo pyrans
    Patent number: 4334066
    Abstract: A pyran derivative represented by the formula ##STR1## wherein R.sub.1 and R.sub.4 are each the same or different alkyl having 1 to 6 carbon atoms, R.sub.2 and R.sub.3, when attached to a nitrogen atom, forms a saturated hetrocyclic ring which has as a hetero atom a nitrogen atom is addition to the nitrogen atom attached to R.sub.2 and R.sub.3, or oxygen atom, and an acid addition salt thereof. The compounds have antibacterial and insecticidal action.
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: June 8, 1982
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Yasuo Shimizu, Hisashi Takao, Shoji Asano, Shuya Shimada, Kazutoshi Kikkawa