Patents by Inventor Shin-ichi Narabu
Shin-ichi Narabu 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: 6174839Abstract: The invention is related to a novel phenylacetylene derivates of formula: wherein X represents hydrogen, halogen, optionally substituted C1-6 alkyl; Y represents hydrogen, halogen, cyano, nitro, optionally substituted C1-6 alkyl, C1-6 alkoxy, C3-8 cycloalkoxy, optionally substituted C1-6 alkylthio, C3-8 cycloalkylthio, C1-6 alkylsulfinyl, optionally substituted C1-6 alkylsulfonyl, C3-8 cycloalkylsulfonyl, C1-6 alkylsulfonyloxy, optionally substituted sulfonamide, optionally substituted carboxamide, etc., or Y may form together with Z which is bonded to the vicinal carbon atom a 5- or 6-membered ring; n is 0 or 1; Z represents hydrogen or halogen; m is 1 or 2; R represents hydrogen, halogen, C1-6 alkyl, tri(C1-6 alkyl)silyl, COORc or CONRdRe; Q represents a heterocyclic group, and their use as herbicid.Type: GrantFiled: February 23, 1999Date of Patent: January 16, 2001Assignee: Nihon Bayer Agrochem K.K.Inventors: Akihiko Yanagi, Shin-ichi Narabu, Toshio Goto, Seishi Ito, Natsuko Minegishi, Tatsuya Yamaoka, Chieko Ueno
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Patent number: 5935907Abstract: The invention is related to a novel phenylacetylene derivates of formula: ##STR1## wherein X represents hydrogen, halogen, optionally substituted C.sub.1-6 alkyl; Y represents hydrogen, halogen, cyano, nitro, optionally substituted C.sub.1-6 alkyl, C.sub.1-6 alkoxy, C.sub.3-8 cycloalkoxy, optionally substituted C.sub.1-6 alkylthio, C.sub.3-8 cycloalkylthio, C.sub.1-6 alkylsulfinyl, optionally substituted C.sub.1-6 alkylsulfonyl, C.sub.3-8 cycloalkylsulfonyl, C.sub.1-6 alkylsulfonyloxy, optionally substituted sulfonamide, optionally substituted carboxamide, etc., or Y may form together with Z which is bonded to the vicinal carbon atom a 5- or 6-membered ring; n is 0 or 1; Z represents hydrogen or halogen; m is 1 or 2; R represents hydrogen, halogen, C.sub.1-6 alkyl, tri(C.sub.1-6 alkyl)silyl, COOR.sup.c or CONR.sup.d R.sup.e ; Q represents a heterocyclic group, and their use as herbicid.Type: GrantFiled: March 24, 1998Date of Patent: August 10, 1999Assignee: Nihon Bayer Agrochem K.K.Inventors: Akihiko Yanagi, Shin-ichi Narabu, Toshio Goto, Seishi Ito, Natsuko Minegishi, Tatsuya Yamaoka, Chieko Ueno
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Patent number: 5767286Abstract: 1,4-Disubstituted-5(4H)-tetrazolinones of the formula (I) ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 have the meanings given in the specification), which are known to be useful as herbicides, can be obtained in very good yields by reacting the corresponding 1-substituted-5(4H)-tetrazolinones with the corresponding carbamoyl chlorides in the presence of 4-dimethylaminopyridine.Type: GrantFiled: September 23, 1994Date of Patent: June 16, 1998Assignee: Nihon Bayer Agrochem K. K.Inventors: Akihiko Yanagi, Yukiyoshi Watanabe, Shin-ichi Narabu
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Patent number: 5747420Abstract: Novel herbicidal tetrazolinone derivatives of the formula ##STR1## and intermediates therefor of the formula ##STR2## wherein R.sup.1 is alkyl substituted by halogen, andR.sup.2 and R.sup.3 each independently is alkyl, alkenyl, alkynyl, cycloalkyl, phenyl or substituted phenyl, orR.sup.2 and R.sup.3 together with the N-atom to which they are attached, which may form a 5- or 6-membered heterocyclic ring.Type: GrantFiled: November 3, 1995Date of Patent: May 5, 1998Assignee: Nihon Bayer Agrochem K.K.Inventors: Toshio Goto, Seishi Ito, Kazuhiro Ukawa, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi
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Patent number: 5652198Abstract: Selective herbicidal tetrazolinones of the formula ##STR1## wherein X is hydrogen or halogen,Y is hydrogen or C.sub.1-4 alkyl,R.sup.1 is C.sub.1-4 alkyl, andR.sup.2 is cycloheptyl or cyclooctyl.and synergistic mixtures thereof.Type: GrantFiled: March 6, 1996Date of Patent: July 29, 1997Assignee: Nihon Bayer Agrochem K.K.Inventors: Toshio Goto, Seishi Ito, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi
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Patent number: 5635446Abstract: Novel herbicidal tetrazolinones of the formula ##STR1## wherein Y is hydrogen, bromine or methyl,R.sup.1 is ethyl or n-propyl, andR.sup.2 is cyclopentyl or cyclohexyl, with the proviso that the total number of carbon atoms in R.sup.1 and R.sup.2 is 7 or 8.The new tetrazolinones may be mixed with other herbicides such as the sulfonylurea herbicides bensulfuron, pyrazosulfuron-ethyl (NC-311), and imazosulfuron (TH-913), and the acid amide herbicide KIH-6127 (tested herbicides A-D, respectively).Type: GrantFiled: May 7, 1996Date of Patent: June 3, 1997Assignee: Niron Bayer Agrochem K.K.Inventors: Toshio Goto, Seishi Ito, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi
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Patent number: 5541336Abstract: Novel herbicidal tetrazolinones of the formula ##STR1## wherein Y is hydrogen, bromine or methyl,R.sup.1 is ethyl or n-propyl, andR.sup.2 is cyclopentyl or cyclohexyl, with the proviso that the total number of carbon atoms in R.sup.1 and R.sup.2 is 7 or 8.The new tetrazolinones may be mixed with other herbicides.Type: GrantFiled: March 10, 1995Date of Patent: July 30, 1996Assignee: Nihon Bayer Agrochem K.K.Inventors: Toshio Goto, Seishi Ito, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi
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Patent number: 5530135Abstract: 1-Substituted-5(4H)-tetrazolinones of the formula (I) ##STR1## wherein R is alkyl, haloalkyl, cycloalkyl, phenyl, substituted phenyl or aralkyl, are obtained in very good yields by reacting, in a polar solvent, an isocyanate of the formula R-NCO (II) with sodium azide (NaN.sub.3) in a molar ratio of 1:1 and in the presence of aluminum chloride (AlCl.sub.3), followed by the addition of water and a mineral acid in excess.Type: GrantFiled: July 29, 1994Date of Patent: June 25, 1996Assignee: Nihon Bayer Agrochem K.K.Inventors: Akihiko Yanagi, Yukiyoshi Watanabe, Shin-ichi Narabu
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Patent number: 5502204Abstract: A process for the preparation of a 1-substituted-5(4H)-tetrazolinone of the formula ##STR1## wherein R.sub.1 is defined in the specificationn is 0, 1, 2, 3 or 4,which comprises reacting a 1-substituted-5(4H)-tetrazolinethione of the formula ##STR2## with an ethylene oxide of the formula ##STR3## wherein R.sup.2 represents hydrogen, methyl or ethyl,in the presence of a base and in the presence of water, an alcohol or a mixture thereof.Type: GrantFiled: September 7, 1994Date of Patent: March 26, 1996Assignee: Nihon Bayer Agrochem K.K.Inventors: Akihiko Yanagi, Yukiyoshi Watanabe, Shin-ichi Narabu
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Patent number: 5466660Abstract: Compositions comprising herbicidal tetrazolinones of the formula (I) ##STR1## wherein X is chlorine or bromine, Y is hydrogen, chlorine, bromine, methyl or ethyl, andR.sup.1 and R.sup.2 are the same or different C.sub.2-4 alkyl,and at least one additional herbicide.Type: GrantFiled: April 21, 1994Date of Patent: November 14, 1995Assignee: Nihon Bayer Agrochem K.K.Inventors: Toshio Goto, Hidenori Hayakawa, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi
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Patent number: 5362704Abstract: Herbicidal novel tetrazolinones of the formula ##STR1## wherein Y represents hydrogen, chlorine, or methyl,R.sup.1 represents ethyl or n-propyl, andR.sup.2 represents cyclopentyl or cyclohexyl, with the proviso that the total of the carbon atoms of R.sup.1 and R.sup.2 is 7 or 8. They may be mixed with other herbicides.Type: GrantFiled: February 24, 1994Date of Patent: November 8, 1994Assignee: Nihon Bayer Agrochem K.K.Inventors: Toshio Goto, Seishi Ito, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi
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Patent number: 5347010Abstract: Novel tetrazolinones of the formula (I) ##STR1## wherein X is chlorine or bromine,Y is hydrogen, chlorine, bromine, methyl or ethyl, andR.sup.1 and R.sup.2 are the same or different C.sub.2-4 alkyl, a process for their preparation, and the use of the new compounds as herbicides, especially against paddy-weeds.Type: GrantFiled: July 1, 1993Date of Patent: September 13, 1994Assignee: Nihon Bayer Agrochem K.K.Inventors: Toshio Goto, Hidenori Hayakawa, Yukiyoshi Watanabe, Shin-ichi Narabu, Akihiko Yanagi