Patents by Inventor Eung-Kul Ryu

Eung-Kul Ryu 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).

  • Patent number: 6838416
    Abstract: The present invention provided with novel 5-benzyloxymethyl-1,2-isoxazoline derivatives of the formula (1), their preparation method and their use as herbicides. The 5-benzyloxymethyl-1,2-isoxazoline derivatives according to the present invention have sufficiently high herbicidal activity against the weeds in the paddy field rice even at low dose rates and excellent selectivity to transferred rice in particular. As thus, the compounds of the present invention are typically useful as herbicides for control of paddy weeds in rice.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: January 4, 2005
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Eung-Kul Ryu, Hyoung-Rae Kim, Dong-Ju Jeon, Jong-Whan Song, Kyoung-Mahn Kim, Jung-No Lee, Hyoung-Cheul Kim, Kyung-Sik Hong
  • Publication number: 20040023808
    Abstract: The present invention provided with novel 5-benzyloxymethyl-1,2-isoxazoline derivatives of the formula (1), their preparation method and their use as herbicides. The 5-benzyloxymethyl-1,2-isoxazoline derivatives according to the present invention have sufficiently high herbicidal activity against the weeds in the paddy field rice even at low dose rates and excellent selectivity to transferred rice in particular. As thus, the compounds of the present invention are typically useful as herbicides for control of paddy weeds in rice.
    Type: Application
    Filed: March 6, 2003
    Publication date: February 5, 2004
    Inventors: Eung-Kul Ryu, Hyoung-Rae Kim, Dong-Ju Jeon, Jong-Whan Song, Kyoung-Mahn Kim, Jung-No Lee, Hyoung-cheul Kim, Kyung-Sik Hong
  • Patent number: 6239076
    Abstract: The present invention relates to 2-(5-isoxazolinylmethyloxyphenyl)-4,5,6,7-tetrahydro-2H-indazole derivatives of formula 1, their preparation method and their use as herbicides. As the compounds have excellent herbicidal activity against paddy weeds comprising ECHOR, SCPJU, MOOVA, CYPSE and SAGPY, and better selectivity, the compounds of the present invention are typically useful as herbicides for control of paddy weeds in conditions with seeded rice and transferred rice.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: May 29, 2001
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Eung Kul Ryu, Dong Ju Jeon, Jong Hwan Song, Hyoung Rae Kim, Jung No Lee, Kyoung Mahn Kim, Kwang Yun Cho
  • Patent number: 6096930
    Abstract: The present invention relates to novel cyclohexane-1-3-dione derivatives of formula (1) useful as herbicides and plant-growth regulants, ##STR1## wherein X is selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 haloalkyl, nitro, C.sub.1 -C.sub.6 alkylthio, C.sub.1 -C.sub.6 alkylsulfinyl, C.sub.1 -C.sub.6 alkylsulfonyl, C.sub.1 -C.sub.6 sulfamoyl, and N, N-di(C.sub.1 -C.sub.6 alkyl)sulfamoyl group; (X)n represents the number of X substituents which may be substituted on benzene ring, wherein n is 1, 2 or 3. Also, cyclohexyl moiety, one of the substituents on benzofuran ring, is substituted at C-4, C-5, C-6 or C-7 position on benzene ring; R.sup.1 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.6 alkyl group; R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl and C.sub.2 -C.sub.6 alkynyl group; R.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: August 1, 2000
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Eung Kul Ryu, Kyoung Mahn Kim, Jae Nyoung Kim, Jin Seog Kim