Patents by Inventor Harutoshi Yoshikawa

Harutoshi Yoshikawa 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).

  • Method of controlling graminaceous weeds
    Patent number: 6124243
    Abstract: A herbicide comprising the sulfonylurea derivatives of the formula (I): ##STR1## wherein Q is --CH.dbd.CH-- or --S--, R is C.sub.1-3 alkyl, and X is --OCH.sub.3 or --CH.sub.3 ; or a salt thereof, are useful for the control of undesired vegetation, for example, black glass (Alopecurus myosuroides) or downy brome (Bromus tectorum L.) in the presence of many valuable small grain cereals such as wheat, barley, oats and rye. The herbicide is also unexpectedly tolerant to small grain cereals such as wheat, barley, oats and rye.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: September 26, 2000
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yasuo Ishida, Kazunari Ohta, Harutoshi Yoshikawa
  • Herbicidal imidazo[1,2-a]pyridin-3-ylsulfonylurea
    Patent number: 5534482
    Abstract: A herbicide comprising the sulfonylurea derivatives of the formula (I): ##STR1## wherein Q is --CH.dbd.CH-- or --S--, R is C.sub.1-3 alkyl, and X is --OCH.sub.3 or --CH.sub.3 ; or a salt thereof, are useful for the control of undesired vegetation, for example, black glass (Alopecurus myosuroides) or downy brome (Bromus tectorum L.) in the presence of many valuable small grain cereals such as wheat, barley, oats and rye. The herbicide is also unexpectedly tolerant to small grain cereals such as wheat, barley, oats and rye.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 9, 1996
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yasuo Ishida, Kazunari Ohta, Harutoshi Yoshikawa
  • Sulfonylurea compounds and herbicidal use
    Patent number: 5017212
    Abstract: A compound of the general formula: ##STR1## wherein Q is a condensed heterocyclic group having an N atom in the bridgehead which may be substituted, W is O or S, R.sub.1 and R.sub.2 each are an alkyl group, an alkoxy group or halogen and Z is CH or N, and a salt thereof, which is useful as a herbicide.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: May 21, 1991
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yasuo Ishida, Kazunari Ohta, Tatsuo Nakahama, Harutoshi Yoshikawa
  • Herbicidal pyridyl-ethoxy-phenyl urea derivatives
    Patent number: 4443246
    Abstract: Urea derivatives of the general formula: ##STR1## wherein R.sup.1 stands for a lower alkly group; and R.sup.2 stands for a lower alkyl group or a lower alkoxy group, or a salt thereof, are novel and have a strong herbicidal activity against various species of weeds and shows a very low phytotoxicity to crop plants.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: April 17, 1984
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yutaka Kawamatsu, Takahiro Saraie, Harutoshi Yoshikawa