Patents by Inventor Takasi Ikai
Takasi Ikai 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).
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Patent number: 6197728Abstract: Quinoxaline derivatives having the formula I wherein X represents a halogen atom; R represents —COR1, —CH═CH—COOR2(R2 represents a C1-C4 alkyl group); —CN or —CH2OH, and R1 represents —S—R3 (R3 represents a C1-C4 alkyl or alkenyl group or phenyl or chlorophenyl group), —NH—R4 (R4 represents a C1-C4 alkoxy carbonylalkyl group, hydroxy alkyl group, phenyl group, C1-C4 alkoxy alkyl group or di C1-C4 alkyl amino group) are remarkably effective as selective herbicides.Type: GrantFiled: August 30, 1994Date of Patent: March 6, 2001Assignee: Nissan Chemical Industries Ltd.Inventors: Yasukazu Ura, Gozyo Sakata, Kenzi Makino, Yasuo Kawamura, Y{overscore (u)}zi Kawamura, Takasi Ikai, Tosihiko Oguti
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Patent number: 5364831Abstract: Quinoxaline derivatives having the formula I ##STR1## wherein X represents a halogen atom; R represents ##STR2## --CH.dbd.CH--COOR.sup.2 (R.sup.2 represents a C.sub.1 -C.sub.4 alkyl group); --CN or --CH.sub.2 OH, and R.sup.1 represents ##STR3## --S--R.sup.3 (R.sup.3 represents a C.sub.1 -C.sub.4 alkyl or alkenyl group or phenyl or chlorophenyl group), --NH--R.sup.4 (R.sup.4 represents a C.sub.1 -C.sub.4 alkoxy carbonylalkyl group, hydroxy alkyl group, phenyl group; C.sub.1 -C.sub.4 alkoxy alkyl group or di C.sub.1 -C.sub.4 alkyl amino group), are remarkably effective as selective herbicides.Type: GrantFiled: August 6, 1980Date of Patent: November 15, 1994Assignee: Nissan Chemical Industries Ltd.Inventors: Yasukazu Ura, Gozyo Sakata, Kenzi Makino, Yasuo Kawamura, Yuzi Kawamura, Takasi Ikai, Tosihiko Oguti
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Patent number: 4954164Abstract: Disclosed is a novel pyrazolesulfonylurea derivative represented by the formula (I), preparation thereof, a herbicide containing said derivative as an active ingredient and a herbicidal method by use thereof. ##STR1## (wherein A, B, C, D, X, Y and Z are as defined in the specification).Type: GrantFiled: February 24, 1983Date of Patent: September 4, 1990Assignee: Nissan Chemical Industries, Ltd.Inventors: Fumio Suzuki, Yoshihiro Iwasawa, Toshiaki Sato, Takasi Ikai, Tosihiko Oguti
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Patent number: 4844728Abstract: Disclosed are a pyrazolesulfonamide derivative represented by Formula (I): ##STR1## wherein B, D, Q, E, W and G have the same meaning as defined in the specification,a process for its production and a herbicide containing it.Type: GrantFiled: November 24, 1986Date of Patent: July 4, 1989Assignee: Nissan Chemical Industries, Ltd.Inventors: Susumu Yamamoto, Kakuta Takuya, Toshiaki Sato, Katsushi Morimoto, Eiichi Oya, Takasi Ikai, Tsutomu Nawamaki, Kenji Hattori
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Patent number: 4824474Abstract: A pyridine derivative having the formula: ##STR1## wherein one of A, B, D and E is oxygen, sulfur, --SO--, --SO.sub.2 --, --NR.sup.3 --, ##STR2## or .dbd.CH-- with the rest being all carbon atoms; X is halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 haloalkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 haloalkylthio, C.sub.1 -C.sub.4 alkoxycarbonyl, C.sub.1 -C.sub.4 alkylthioalkyl, tetrahydrothiopyranyl, hydroxyl, CF.sub.3, phenyl or pyridyl; n is an integer of from 0 to 6,; W is oxygen or sulfur; R is hydrogen, di-lower alkylimino, C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, C.sub.2 -C.sub.5 alkynyl, C.sub.4 or C.sub.5 oxacycloalkyl, C.sub.2 -C.sub.5 mono-, di- or tri-haloalkenyl, C.sub.2 -C.sub.5 haloalkynyl, glycidyl, furfuryl, alkylthioalkyl, C.sub.3 -C.sub.6 cycloalkyl or a cation R.sup.1 is C.sub.1 -C.sub.4 alkyl, R.sup.2 is C.sub.1 -C.sub.4 alkyl or C.sub.3 -C.sub.6 cycloalkyl, or R.sup.1 and R.sup.Type: GrantFiled: July 1, 1987Date of Patent: April 25, 1989Assignee: Nissan Chemical Industries Ltd.Inventors: Tatsuo Numata, Masataka Hatanaka, Junichi Watanabe, Takasi Ikai, Tsutomu Nawamaki, Kenji Hattori
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Patent number: 4744815Abstract: Pyrazole derivatives of the formula I: ##STR1## wherein R represents a lower alkyl group or a lower alkenyl group atoms which may be substituted by halogen atom,X represents a halogen atom, a lower alkyl group, nitro group, cyano group, a lower alkylsulfonyl group or trifluoromethyl group,n is an integer of 2 to 4,Q represents hydrogen atom; an aralkyl group which may be substituted by halogen atom, nitro group, cyano group or a lower alkyl group; benzenesulfonyl group which may be substituted by a lower alkyl group or halogen atom; benzoyl group which may be substituted by a lower alkyl group or halogen atom; phenacyl group which may be substituted by a lower alkyl group or halogen atom; a lower alkyl group which may be substituted by halogen atom; a lower alkenyl group which may be substituted by halogen atom; or a lower alkynyl group,and a method for preparation of said derivatives, a selective herbicidal composition containing said derivatives as active ingredient,as well as a method for controlling weedsType: GrantFiled: May 6, 1986Date of Patent: May 17, 1988Assignee: Nissan Chemical Industries, Ltd.Inventors: Masatoshi Baba, Norio Tanaka, Takasi Ikai, Tsutomu Nawamaki
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Patent number: 4696694Abstract: A pyridine derivative having the formula: ##STR1## wherein one of A, B, D and E is oxygen, sulfur, --SO--, --SO.sub.2 --, --NR.sup.3 --, ##STR2## or .dbd.CH-- with the rest being all carbon atoms; X is halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 haloalkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 haloalkylthio, C.sub.1 -C.sub.4 alkoxycarbonyl, C.sub.1 -C.sub.4 alkylthioalkyl, tetrahydrothiopyranyl, hydroxyl, CF.sub.3, phenyl or pyridyl; n is an integer of from 0 to 6,; W is oxygen or sulfur; R is hydrogen, di-lower alkylimino, C.sub.1 -C.sub.5 alkyl, C.sub.2 -C.sub.5 alkenyl, C.sub.2 -C.sub.5 alkynyl, C.sub.4 or C.sub.5 oxacycloalkyl, C.sub.2 -C.sub.5 mono-, di- or tri-haloalkenyl, C.sub.2 -C.sub.5 haloalkynyl, glycidyl, furfuryl, alkylthioalkyl, C.sub.3 -C.sub.6 cycloalkyl or a cation R.sup.1 is C.sub.1 -C.sub.4 alkyl, R.sup.2 is C.sub.1 -C.sub.4 alkyl or C.sub.3 -C.sub.6 cycloalkyl, or R.sup.1 and R.sup.Type: GrantFiled: July 7, 1986Date of Patent: September 29, 1987Assignee: Nissan Chemical Industries Ltd.Inventors: Tatsuo Numata, Masataka Hatanaka, Junichi Watanabe, Takasi Ikai, Tsutomu Nawamaki, Kenji Hattori
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Patent number: 4689417Abstract: The present invention provides novel compounds which are intermediates in the production of the compounds of the formula (I). These novel intermediates have the following general formula ##STR1## wherein Z is NH.sub.2 or chlorine, R.sup.1 is chlorine or bromine and R.sup.2 is methyl or ethyl.Type: GrantFiled: September 15, 1986Date of Patent: August 25, 1987Assignee: Nissan Chemical Industries, Ltd.Inventors: Susumu Yamamoto, Toshiaki Sato, Takasi Ikai, Tsutomu Nawamaki, Tosihiko Oguti
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Patent number: 4668277Abstract: There are disclosed a compound formula (I): ##STR1## wherein R.sup.1 represents a chlorine atom or a bromine atom; R.sup.2 represents methyl or ethyl; and X represents methyl or methoxy; a herbicidal composition containing the same as an active ingredient; and a method of use of the compound represented by formula (I) for controlling the growth of weeds without harm to crop plants in the same location.Type: GrantFiled: March 19, 1985Date of Patent: May 26, 1987Assignee: Nissan Chemical Industries, Ltd.Inventors: Susumu Yamamoto, Toshiaki Sato, Takasi Ikai, Tosihiko Oguti, Tsutomu Nawamaki
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Patent number: 4643757Abstract: Pyrazole derivatives, selective herbicidal compositions containing said derivatives and the use of said derivatives are provided. The pyrazole derivatives having selective herbicidal activity are represented by the formula I: ##STR1## wherein, X denotes a halogen, nitro or methanesulfonyl,Y denotes hydrogen, a lower alkyl or a halogen,Z denotes a halogen or methanesulfonyl, andR denotes hydrogen; an organic acid residue; a lower alkynyl; a lower alkyl or a lower alkenyl which may be substituted by a halogen, hydroxy, cyano or an alkoxycarbonyl; or a benzyl which may be substituted by a halogen, nitro or a lower alkyl.Type: GrantFiled: May 20, 1985Date of Patent: February 17, 1987Assignee: Nissan Chemical Industries, Ltd.Inventors: Masatoshi Baba, Norio Tanaka, Takasi Ikai, Tsutomu Nawamaki, Masaji Matsunaga
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Patent number: 4629493Abstract: A herbicidal composition which comprises an adjuvant and an active ingredient of heterocyclic ether type phenoxy fatty acid derivative having the formula ##STR1## wherein A represents --CH-- or --N--; X represents a halogen atom; n is 0, 1 or 2; R.sup.1 represents a hydrogen atom; a lower alkyl group; R.sup.2 represents --OH; --O-alkyl group; --OM group (M is an inorganic or organic salt moiety); ##STR2## --O-lower alkenyl group; --O-benzyl group; --O-lower alkylalkoxy group; --O-phenyl; --O-cyclohexyl, --O-halogenoalkyl, --O-lower alkynyl and --O-cyanoalkyl; R.sup.3 and R.sup.4 respectively represent a hydrogen atom or a lower alkyl group.Type: GrantFiled: January 29, 1980Date of Patent: December 16, 1986Assignee: Nissan Chemical Industries Ltd.Inventors: Yasukazu Ura, Gozyo Sakata, Kenzi Makino, Yasuo Kawamura, Yuzi Kawamura, Takasi Ikai, Tosihiko Oguti
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Patent number: 4508561Abstract: 1-Phenylethyl sulfone derivatives substituted by a halogenated alkyloxy group is represented by the general formula ##STR1## where R is an alkyl group substituted by a halogen atom, n is 1 or 2, each of P and Q is a hydrogen atom or a lower alkyl group and each of X and Y is a hydrogen atom, a lower alkyl group or a halogen atom. The compounds are effective as a herbicide. Also disclosed is a process for their preparation.Type: GrantFiled: January 12, 1983Date of Patent: April 2, 1985Assignee: Nissan Chemical Industries Ltd.Inventors: Gozyo Sakata, Tatsuo Numata, Kenzi Makino, Takuya Kakuta, Kazuya Kusano, Takasi Ikai, Tosihiko Oguti