Patents by Inventor Ahmed Tafesh
Ahmed Tafesh 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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Publication number: 20060100318Abstract: This invention is directed to an extruded product, extrudable compound, and an extrusion method using a polymer, a cellulosic fiber, and at least one lubricant selected from the group consisting of ethoxylated esters of hydantoins, ethoxylated esters of sorbitol or sorbitan, or N, N?-bisalkanoylethylenediamines containing from 8 to 14 carbons of the alkanoyl group and compositions manufactured through such processes which simulate conventional wood products. The N,N?-bisalkanoylethylenediamines are new compositions of matter containing from 8 to 14 carbons of the alkanoyl group having a particle size range from about 90 to 150 ?m, preferably from about 120 to 140 ?m.Type: ApplicationFiled: November 8, 2004Publication date: May 11, 2006Applicant: Lonza Inc.Inventors: Joseph Williams, Kenneth Geick, Ahmed Tafesh, Xiao Jiang
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Publication number: 20060029649Abstract: The present invention provides antimicrobial compositions comprising an antimicrobial agent and a thermally stabilizing effective amount of an amide based stabilizing agent. The present invention also provides polymeric-cellulosic fiber formulations comprising a polymeric-cellulosic fiber composition and an antimicrobially effective amount of the antimicrobial composition. The present invention further provides a method of thermally stabilizing an antimicrobial agent and an improved method for making a polymeric-cellulosic fiber formulation with antimicrobial activity.Type: ApplicationFiled: August 6, 2004Publication date: February 9, 2006Inventors: Ahmed Tafesh, Maria Alonso-DeBolt
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Publication number: 20050256231Abstract: The invention relates to a polymer-cellulosic fiber composition comprising a polymer, a cellulosic fiber, and a quaternary ammonium alkyl salt wherein the latter imparts antimicrobial properties to the composition and functions as a lubricant during the formation of the composition. The quaternary ammonium alkyl salts may be alkyl carboxylate, alkyl sulfate, alkyl sulphonate, alkyl phosphate, or alkyl phosphite. Certain of the salts are new compositions of matter. The method of extruding and the extrudate are also claimed.Type: ApplicationFiled: August 29, 2003Publication date: November 17, 2005Applicant: Lonza Inc.Inventors: Xiao Jiang, Ahmed Tafesh, Joseph Williams, Howard Cash, Kenneth Geick
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Patent number: 6150298Abstract: Process for the telomerization of dienesThe present invention relates to a process for the telomerization of dienes, according to which the diene is reacted with a compound containing an active hydrogen atom in the presence of a palladium compound, a water-soluble phosphine ligand and a base, the water-soluble ligand being a bidentate ligand having the following formula I ##STR1## in which R is identical or different and is phenyl, C.sub.1 -C.sub.12 -alkyl or C.sub.3 -C.sub.10 -cycloalkyl, which may be unsubstituted or substituted by one or more radicals R',R' is identical or different and is SO.sub.3.sup.- M.sup.+, --NMe.sub.3.sup.+ or --COO.sup.- M.sup.+,n is an integer from 1 to 6, in each case based on a naphthyl backbone, andM is H, Na, K, Cs or R".sub.4 N.sup.+ where R" is identical or different and is H, C.sub.1 -C.sub.12 -alkyl or C.sub.1 -C.sub.10 -cycloalkyl.Type: GrantFiled: June 25, 1999Date of Patent: November 21, 2000Assignee: Celanese GmbHInventors: Ahmed Tafesh, Matthias Beller, Jochen Krause
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Patent number: 6008387Abstract: Disclosed and claimed are oxidation reactions involving, as a catalyst, a bis- and/or tris-(.mu.-oxo)-dimanganese complex salt of the formula I[LMn(.mu.-O).sub.a (.mu.-OAc).sub.b MnL].sup.x A.sub.y (I)Ac is a C.sub.2 -C.sub.8 -acyl group,a is 1, 2 or 3,b is 0 when a is 2 or 3 or b is 2 when a is 1,x indicates the number of positive charges and is 2 or 3,A is a singly or doubly negatively charged anion,y is the number of anions A required to balance the positive charges andL is a ligand, such as N,N-bis(2-pyridylmethyl)-N-methylamine or N,N,N',N'-tetrakis(2-pyridyl(methyl)-N-methylamine or N.sub.1 N.sub.1 N.sub.1, N.sup.1 -tetrakis(2-pyridylmethyl)-1,2-ethylenediamine.Type: GrantFiled: January 2, 1997Date of Patent: December 28, 1999Assignee: Hoechst AktiengesellschaftInventors: Ahmed Tafesh, Matthias Beller
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Patent number: 6005151Abstract: The invention relates to a process for preparing monofunctional, bifunctional or polyfunctional aromatic olefins of the formula (I) ##STR1## wherein a palladium compound of the formula (IV) ##STR2## is used as a catalyst in the preparation of the compounds of the formula (I).Type: GrantFiled: January 30, 1996Date of Patent: December 21, 1999Assignee: AventisInventors: Wolfgang Anton Herrmann, Matthias Beller, Ahmed Tafesh
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Patent number: 5942152Abstract: Bleach systems comprising bis- and tris(.mu.-oxo)dimanganese complex salts as catalystBis- and tris(.mu.-oxo)dimanganese complex salts of the formula?LMn(.mu.-O).sub.a (.mu.-OAc).sub.b MnL!.sup.x A.sub.yas catalysts for oxidizing organic compounds, in which formulaAc is a C.sub.2 -C.sub.8 -acyl group,a is 1, 2 or 3,b is 0 if a is 2 or 3 or is 2 if a is 1,x denotes the number of positive charges and is 2 or 3,A is an anion,y is the equivalent amount of anion A required to compensate the positive charges, andL is a ligand, preferably N,N'-bis(2-pyridylmethyl)-N-methylamine or N,N,N',N'-tetrakis(2-pyridylmethyl)-1,2-ethylenediamineare employed as catalysts in bleach systems for textile material.Type: GrantFiled: January 3, 1997Date of Patent: August 24, 1999Assignee: Aventis Research & Technologies GmbH & Co. KGInventors: Ahmed Tafesh, Matthias Beller, Vera Friderichs, Gerd Reinhardt
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Patent number: 5792878Abstract: A process for preparing chiral epoxides using chiral manganese triazanonane complexes as oxidation catalysts. These catalysts have the general formula?Mn.sub.u (L).sub.v (OR).sub.w (.mu.O).sub.x (.mu.OAc).sub.y !X.sub.Type: GrantFiled: June 28, 1996Date of Patent: August 11, 1998Assignee: Hoechst AktiengesellschaftInventors: Matthias Beller, Ahmed Tafesh, Richard Walter Fischer, Bernd Scharbert
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Patent number: 5756727Abstract: The chiral manganese-triazonone complex of the general formula (I) is disclosed:?Mn.sub.u (L).sub.V (OR).sub.W (.mu.-O).sub.X (.mu.OAc).sub.y !X.sub.z(I)The complex is useful industrially to prepare chiral compounds.Type: GrantFiled: June 28, 1996Date of Patent: May 26, 1998Assignee: Hoechst AGInventors: Matthias Beller, Ahmed Tafesh, Richard Walter Fischer, Bernd Scharbert
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Patent number: 5744643Abstract: The present invention relates to a process for preparing aromatic amines by reacting an aromatic nitro compound with carbon monoxide in a solvent mixture comprising water and a water-insoluble organic solvent by means of a catalyst comprising palladium and a water-soluble phosphine under a pressure of from 5 to 300 bar and at a temperature of from 50 to 200.degree. C., and separating the aqueous phase and the organic phase.Type: GrantFiled: February 21, 1996Date of Patent: April 28, 1998Assignee: Hoechst AktiengesellschaftInventors: Matthias Beller, Ahmed Tafesh, Christian Kohlpaintner, Christoph Naumann
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Patent number: 5684182Abstract: The present invention relates to sulfonated diphosphines of the formula (I) ##STR1## where M is hydrogen, ammonium, a monovalent metal or the equivalent of a polyvalent metal, a, b, c and d are each 0 or 1, with the proviso that a+b+c+d is an integer from 1 to 4, Ar is an m-(MSO.sub.3)--C.sub.6 H.sub.4 radical and M is as defined above, n is 0, 1 or 2, Ph is a phenyl radical, R.sup.1 and R.sup.2 are identical or different and are each an alkyl radical having from 1 to 10 carbon atoms or a cycloaliphatic radical having from 5 to 10 carbon atoms in the ring, and a process for their preparation.Type: GrantFiled: February 21, 1996Date of Patent: November 4, 1997Assignee: Hoechst AktiengesellschaftInventors: Christoph Naumann, Ahmed Tafesh, Dieter Regnat, Hans-Jerg Kleiner
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Patent number: 5254753Abstract: The invention provides a process for preparing aryl ethanols from aryl methyl ketones. The process involves a novel oxidation of the ketone to a dialkylacetal derivative of an aryl glyoxal, which is then hydrolyzed to an aryl glyoxal. The aryl glyoxal is then catalytically hydrogenated to reduce both carbonyl groups simultaneously to yield the aryl ethanol.Type: GrantFiled: February 25, 1992Date of Patent: October 19, 1993Assignee: Hoechst Celanese CorporationInventors: J. R. Durrwachter, G. N. Mott, H. Ramos, Jr., Ahmed Tafesh
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Patent number: 5220066Abstract: This invention provides a process for directly preparing arylethylamines and their salts from (.alpha.-halo-.alpha.-oximino)acetophenones. The process involves hydrogenation in presence of a transition metal catalyst. The process is illustrated by conversion of 4-hydroxy-(.alpha.-chloro-.alpha.Type: GrantFiled: March 30, 1992Date of Patent: June 15, 1993Assignee: Hoechst Celanese CorporationInventors: Ahmed Tafesh, B. Frank Wood, Joseph A. McDonough, Graham N. Mott
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Patent number: 5220067Abstract: This invention provides a process for directly preparing hydrohalide salts of arylethylamines from (.alpha.-chloro-.alpha.-oximino)acetophenones. The process involves hydrogenation in presence of a transition metal catalyst in an organic acid in substantial absence of moisture. The process is illustrated by conversion of 4-hydroxy (.alpha.-chloro-.alpha.Type: GrantFiled: March 30, 1992Date of Patent: June 15, 1993Assignee: Hoechst Celanese CorporationInventors: Ahmed Tafesh, B. Frank Wood, Joseph A. McDonough, Graham N. Mott