Patents by Inventor Ryuichi Sago

Ryuichi Sago 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).

  • Phenoxy or pyridyloxy-2H-1,4-benzoxazine-3-one derivative and herbicide containing same as active ingredient
    Patent number: 5338719
    Abstract: A benzoxazine derivative having the formula (I) and a salt thereof: ##STR1## wherein A, X, Z, R.sup.1, R.sup.2 and R.sup.3 are as described in the disclosure, and a herbicide containing the compound of the formula (I) as an effective ingredient.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: August 16, 1994
    Assignee: Suntory Limited
    Inventors: Naoko Kawaguchi, Harukazu Fukami, Ryuichi Sago, Keitaro Ikai
  • Benzoxazine derivative and benzothiazine derivative and herbicide comprising the same as active ingredient
    Patent number: 5141551
    Abstract: A benzoxazine derivative and a benzothiazine derivative having the formula (I): ##STR1## wherein A is N or a CH group;B is O, S, and SO group or an SO.sub.2 group;W is O, S, a CR.sup.4 R.sup.5 group or an NR.sup.4 group wherein R.sup.4 and R.sup.5 are each independently a hydrogen atom, a CN group or an NO.sub.2 group;X, Y and Z are each independently a hydrogen atom, a halogen atom or a lower haloalkyl group having 1 to 3 carbon atoms;R.sup.1 is a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, a lower alkenyl group having 2 to 5 carbon atoms, a lower alkynyl group having 2 to 5 carbon atoms, a lower hydroxyalkyl group having 1 to 5 carbon atoms or a lower haloalkyl group having 1 to 3 carbon atoms; andR.sup.2 and R.sup.3 are each independently a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms or an aryl group having 6 to 10 carbon atoms and a herbicidal composition containing the compound of the formula (I) as an active ingredient.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: August 25, 1992
    Assignee: Suntory Limited
    Inventors: Naoko Kawaguchi, Harukazu Fukami, Shinjiro Niwata, Ryuichi Sago, Fumio Fujita