Patents by Inventor Nansho Seki

Nansho Seki 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).

  • Herbicidal N-(5-t-butyl-3-pyrazolyl) carbamates
    Patent number: 4545809
    Abstract: A pyrazole derivative represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represents a lower alkyl group, which has herbicidal activity, is disclosed. A process for preparing the pyrazole derivative of the formula (I) is also disclosed. A herbicide containing as an active ingredient the pyrazole derivative of the formula (I) is further disclosed as is a method for using the herbicide.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: October 8, 1985
    Assignee: SDS Biotech K.K.
    Inventors: Nansho Seki, Yuki Yamaguchi, Yukihiro Nakamura, Hiroshi Kubo, Tetsuo Tsuruya
  • Herbicidal 5-t-butyl-3-(N-alkanoylamino)pyrazoles
    Patent number: 4505739
    Abstract: A novel pyrazole derivative represented by the formula [I]: ##STR1## wherein X and Y are defined in the specification, which has a herbicidal activity, is disclosed. A process for preparing the pyrazole derivative of the formula [I] is also disclosed. A herbicide containing as an active ingredient the pyrazole derivative of the formula [I] is further disclosed.
    Type: Grant
    Filed: January 13, 1982
    Date of Patent: March 19, 1985
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Nansho Seki, Yuki Yamaguchi, Yukihiro Nakamura, Hiroshi Kubo, Tetsuo Tsuruya
  • Herbicidal 5-t-butyl-3-pyrazalylcarbamates and ureas
    Patent number: 4501606
    Abstract: A novel pyrazole derivative represented by the formula [I]: ##STR1## wherein X and Y are defined in the specification, which has herbicidal activity, is disclosed. A process for preparing the pyrazole derivative of the formula [I] is also disclosed. A herbicide containing as an active ingredient the pyrazole derivative of the formula [I] is further disclosed as is a method for using the herbicide.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: February 26, 1985
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Nansho Seki, Yuki Yamaguchi, Yukihiro Nakamura, Hiroshi Kubo, Tetsuo Tsuruya
  • 3-(.alpha.,.alpha.-Dimethylbenzyl)urea compounds, compositions, and their use as herbicides
    Patent number: 4143061
    Abstract: A compound of the general formula (I): ##STR1## wherein X is halogen or trifluoromethyl, n and m are 0 or 1, R.sub.1 is lower C.sub.1 - C.sub.2 alkyl or C.sub.1 - C.sub.2 alkoxy and R.sub.2 is C.sub.4 - C.sub.5 alkyl, cyclohexyl, or phenyl, methods of the preparation thereof, herbicidal compositions containing same and a method for controlling weeds using the same.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: March 6, 1979
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Hiroshi Kubo, Takashi Isono, Nansho Seki, Noriyuki Sato
  • Herbicidal 3-(2-phenylisopropyl)urea derivatives
    Patent number: 4078913
    Abstract: A compound of the general formula ##STR1## wherein Z is a hydrogen atom or a lower alkyl group; R.sub.1 is a hydrogen atom or an alkyl group; and R.sub.2 is a lower alkyl group or a phenyl group, which may have one or more lower alkyl, lower alkoxy, nitro, phenyl or trifluoromethyl groups or one or more halogen atoms as benzene substituent is found to be useful as a herbicide selectively combating weeds belonging to barnyardgrass of Gramineae and to Cyperacceae, without causing any phytotoxicity to rice plants.
    Type: Grant
    Filed: July 18, 1975
    Date of Patent: March 14, 1978
    Inventors: Tetsuo Takematsu, Shizuo Ohga, Akira Terakawa, Masatomo Ito, Hiroshi Kubo, Nansho Seki
  • .alpha.,.alpha.-Dimethylbenzylureas and use as herbicides
    Patent number: 3972909
    Abstract: A compound of the formula ##EQU1## wherein R represents a member selected from alkyl and alkenyl radicals of at most 4 carbon atoms,And a method for controlling weed growth which comprises applying to the locus to be treated a herbicidally effective amount of said .alpha., .alpha.-dimethylbenzylurea compound.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: August 3, 1976
    Assignee: Shova Denko Kabushiki Kaisha
    Inventors: Hiroshi Kubo, Tatuya Michibayashi, Nansho Seki, Noriyuki Sato