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).

  • Publication number: 20060100318
    Abstract: 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: Application
    Filed: November 8, 2004
    Publication date: May 11, 2006
    Applicant: Lonza Inc.
    Inventors: Joseph Williams, Kenneth Geick, Ahmed Tafesh, Xiao Jiang
  • Publication number: 20060029649
    Abstract: 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: Application
    Filed: August 6, 2004
    Publication date: February 9, 2006
    Inventors: Ahmed Tafesh, Maria Alonso-DeBolt
  • Publication number: 20050256231
    Abstract: 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: Application
    Filed: August 29, 2003
    Publication date: November 17, 2005
    Applicant: Lonza Inc.
    Inventors: Xiao Jiang, Ahmed Tafesh, Joseph Williams, Howard Cash, Kenneth Geick
  • Patent number: 6150298
    Abstract: 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: Grant
    Filed: June 25, 1999
    Date of Patent: November 21, 2000
    Assignee: Celanese GmbH
    Inventors: Ahmed Tafesh, Matthias Beller, Jochen Krause
  • Patent number: 6008387
    Abstract: 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: Grant
    Filed: January 2, 1997
    Date of Patent: December 28, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ahmed Tafesh, Matthias Beller
  • Patent number: 6005151
    Abstract: 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: Grant
    Filed: January 30, 1996
    Date of Patent: December 21, 1999
    Assignee: Aventis
    Inventors: Wolfgang Anton Herrmann, Matthias Beller, Ahmed Tafesh
  • Patent number: 5942152
    Abstract: 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: Grant
    Filed: January 3, 1997
    Date of Patent: August 24, 1999
    Assignee: Aventis Research & Technologies GmbH & Co. KG
    Inventors: Ahmed Tafesh, Matthias Beller, Vera Friderichs, Gerd Reinhardt
  • Patent number: 5792878
    Abstract: 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: Grant
    Filed: June 28, 1996
    Date of Patent: August 11, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Beller, Ahmed Tafesh, Richard Walter Fischer, Bernd Scharbert
  • Patent number: 5756727
    Abstract: 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: Grant
    Filed: June 28, 1996
    Date of Patent: May 26, 1998
    Assignee: Hoechst AG
    Inventors: Matthias Beller, Ahmed Tafesh, Richard Walter Fischer, Bernd Scharbert
  • Patent number: 5744643
    Abstract: 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: Grant
    Filed: February 21, 1996
    Date of Patent: April 28, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Matthias Beller, Ahmed Tafesh, Christian Kohlpaintner, Christoph Naumann
  • Patent number: 5684182
    Abstract: 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: Grant
    Filed: February 21, 1996
    Date of Patent: November 4, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Christoph Naumann, Ahmed Tafesh, Dieter Regnat, Hans-Jerg Kleiner
  • Patent number: 5254753
    Abstract: 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: Grant
    Filed: February 25, 1992
    Date of Patent: October 19, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: J. R. Durrwachter, G. N. Mott, H. Ramos, Jr., Ahmed Tafesh
  • Patent number: 5220067
    Abstract: 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: Grant
    Filed: March 30, 1992
    Date of Patent: June 15, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: Ahmed Tafesh, B. Frank Wood, Joseph A. McDonough, Graham N. Mott
  • Patent number: 5220066
    Abstract: 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: Grant
    Filed: March 30, 1992
    Date of Patent: June 15, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: Ahmed Tafesh, B. Frank Wood, Joseph A. McDonough, Graham N. Mott