Patents Assigned to Agan Chemical Manufacturers, Ltd.
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Patent number: 8980796Abstract: The invention relates to a crystalline polymorph Form 3 of 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohex-anedione. A process for its preparation, use thereof for the control of weeds, and an herbicidal composition comprising thereof are also disclosed.Type: GrantFiled: July 21, 2010Date of Patent: March 17, 2015Assignee: Agan Chemical Manufacturers Ltd.Inventors: Carmen Cohen, Ruben Maidan
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Publication number: 20120165197Abstract: The invention relates to a crystalline polymorph Form 3 of 2-[4-(methylsulfonyl)-2-nitrobenzoyl]-1,3-cyclohex-anedione. A process for its preparation, use thereof for the control of weeds, and an herbicidal composition comprising thereof are also disclosed.Type: ApplicationFiled: July 21, 2010Publication date: June 28, 2012Applicant: AGAN CHEMICAL MANUFACTURERS LTD.Inventors: Carmen Cohen, Ruben Maidan
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Patent number: 5602283Abstract: A multistage process of preparing N-alkyl-3,4-dialkyl-2,6-dinitroanilines starts from 3,4-dialkyl phenol and goes through the stages of 3,4-dialkyl-2,6-dinitrophenol and 3,4-dialkyl-2,6-ditro alkoxybenzene, wherein the latter are new compounds.Type: GrantFiled: May 23, 1995Date of Patent: February 11, 1997Assignee: Agan Chemical Manufacturers Ltd.Inventor: Morris Sarel
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Patent number: 5475148Abstract: The intermediate ##STR1## wherein R is a lower alkyl group, is used to prepare a N-alkyl-3,4-dialkyl-2,6,-dinitro-aniline in a relatively simple, inexpensive and safe fashion, and with a high yield.Type: GrantFiled: June 23, 1994Date of Patent: December 12, 1995Assignee: Agan Chemical Manufacturers Ltd.Inventor: Morris Sarel
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Patent number: 5118881Abstract: The present invention provides for an improved practical process for producing DDTr-free p,p'-dicofol and its formulations substantially free of the practically inactive o-p'-dicofol comprising either directly recrystallizing technical dicofol from a suitable solvent such as acetic acid or alkanes, or alternatively preparing the p,p'-dicofol by the steps of (a) dehydrohalogenating technical DDT to give DDE; (b) chlorinating DDE to give Cl-DDT; and (c) hydrolyzing Cl-DDT to dicofol, wherein the technical DDT is initially recrystallized from a suitable solvent such as lower alkyl alcohols and then recrystallizing the ressulting p,p'-dicofol from a suitable solvent such as acetic acid or alkanes.Type: GrantFiled: November 8, 1990Date of Patent: June 2, 1992Assignee: Agan Chemical Manufacturers, Ltd.Inventors: Bernard Vaisbuch, Benjamin Shifman, Michael Pikarski
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Patent number: 4970343Abstract: A one-step process for the preparation of nitrosamine-free dinitroaniline herbicides which involves contacting the crude dinitroaniline herbicide in the liquid state, after removal of excess amine, with an effective quantity of a hydrobromide salt of a p-amino benzoate ester, optionally in the presence of such an ester, passing a gaseous stream of air therethrough or applying a reduced pressure so as to essentially remove water present, resulting in an essentially nitrosamine-free product.Type: GrantFiled: June 15, 1987Date of Patent: November 13, 1990Assignee: Agan Chemical Manufacturers Ltd.Inventors: Michael Pikarski, Edmund Dykman
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Patent number: 4838928Abstract: There is provided a postemergent herbicidal composition for use against broadleaved weeds. The composition comprises in combination terbutryne and ametryne in a weight ratio from 1 to 1.3 and up to 1 to 4. The compositions are of special value for use in plantations of cotton, corn and in a variety of orchards. They can be provided in the form of solutions, emulsifiable concentrates, wettable powders, flowable concentrates and the like.Type: GrantFiled: November 16, 1987Date of Patent: June 13, 1989Assignee: Agan Chemical Manufacturers Ltd.Inventors: Zeev Arenstein, Abraham Gotlieb
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Patent number: 4640705Abstract: A method for obtaining satisfactory weed control including control of blackgrass in cereal crops comprising preemergent application of a mixture of terbutryne and trifluralin having a ratio of 1:2 to 2.5:1 and compositions for same, particularly liquid concentrate compositions which do not give crystalline precipitation within 24 hours of emulsification, comprising (a) 7.5 to 18% terbutryne, (b) 15 to 25% trifluralin, (c) 28 to 42% non phytoxic alicyclic ketone, (d) 5 to 15% emulsifier, and (e) stabilizing cosolvent selected from (1) 1 to 3% mesityl oxide, or (2) 8 to 15% lower alkyl esters of C-18 unsaturated fatty acids, or (3) a combination of 10 to 20% isophorone and 1 to 3% di-lower alkyl formamide.Type: GrantFiled: July 6, 1983Date of Patent: February 3, 1987Assignee: Agan Chemical Manufacturers Ltd.Inventors: Julian Gabe, Richard J. Makepeace
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Patent number: 4537992Abstract: A method for removal of nitrosoamine impurities from herbicides comprising contacting a nitrosoamine containing herbicide homogeneously with 0.001% to 1.0% of a compound having the formula: ##STR1## where X equals chlorine or bromine,R.sup.1 equals lower alkyl, anda equals zero or 1; provided that when a equals 1, then:R equals X.sub.n H.sub.(3-n) C(CH.sub.2).sub.p --, or ##STR2## or R.sup.2 COX, where R.sup.2 is selected from alkylene, alkenylene, alkynylene groups having 1 to 5 carbon atoms,n equals 1 to 3, andp equals zero, 1 or 2; and provided that when a equals zero, then:R equals aminophenyl,for a sufficient length of time to remove at least a substantial amount of the nitrosoamine.Type: GrantFiled: February 9, 1984Date of Patent: August 27, 1985Assignee: Agan Chemical Manufacturers, Ltd.Inventors: Michael Pikarski, Julian Gabe, Edmund Dykman