Patents Represented by Attorney, Agent or Law Firm Kathryn M. Sanchez
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Patent number: 7914890Abstract: A polyamide substrate having deposited thereon a copolymer effective to impart resistance to staining by turmeric wherein said copolymer comprises polymer units derived from (a) at least one cyclic olefin having from 5 to 12 carbon atoms, and (b) maleic anhydride wherein the molar ratio of total cyclic olefin to maleic anhydride is between about 0.5 and 1.3, and a method for using the copolymer to impart stain resistance to a polyamide substrate.Type: GrantFiled: December 19, 2007Date of Patent: March 29, 2011Assignee: E.I. duPont de Nemours and CompanyInventor: Stephen Ernest Jacobson
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Patent number: 7851417Abstract: A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with alkanolamine, then glycerol and water, then with a boron compound. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275° F. (135° C.) and higher in the formation.Type: GrantFiled: December 11, 2007Date of Patent: December 14, 2010Assignee: E.I. du Pont de Nemours and CompanyInventor: Donald Edward Putzig
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Patent number: 7838475Abstract: A composition is disclosed which comprises an aryl perfluoropolyether, optionally a halogenated oil, and further optionally a thickening agent. The composition can be used as a lubricant itself or as an additive to an oil or grease lubricant and can withstand temperatures higher than 300° C. without decomposition. The halogenated oil can be a perfluoropolyether, a fluorosilicone, a polytrifluorochloroethylene, or combinations of two or more thereof. The thickening agent can be finely divided silica, boron nitride, clay, soap, poly(tetrafluoroethylene), clay, talc, silica, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof.Type: GrantFiled: September 1, 2005Date of Patent: November 23, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Jon Lee Howell, Alice Elizabeth Van Der Ende, Erik William Perez, Krista Lynn Laugesen
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Patent number: 7833585Abstract: A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A process to prepare the hyperbranched polymer comprises contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene having at least 7 carbon atoms in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions.Type: GrantFiled: July 15, 2009Date of Patent: November 16, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Stephen Ernest Jacobson, Patricia Metzger Cotts
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Patent number: 7795187Abstract: A method for plugging a permeable zone or leak in a subterranean formation comprises introducing into the formation a cross-linkable organic polymer and a cross-linking composition which comprises a zirconium triethanolamine complex, a tetra(hydroxyalkyl)ethylenediamine, water and optionally, a polyol. The method can be used for cross-linking organic polymers over a wide range of pH. By varying the composition and optionally adding a delay agent, the method provides flexibility in rate of cross-linking.Type: GrantFiled: February 14, 2006Date of Patent: September 14, 2010Inventor: Donald Edward Putzig
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Patent number: 7795188Abstract: A zirconium cross-linking agent produced by a process which comprises contacting a zirconium triethanolamine complex with a mixture of polyols, which mixture comprises a hydroxyalkylated diamine and a hydrocarbon polyol. There is further provided a cross-linking composition which comprises (a) an aqueous liquid, (b) a cross-linkable organic polymer, and (c) a solution of a zirconium cross-linking agent which is produced by a process which comprises contacting a zirconium triethanolamine complex having a molar ratio of 1:2 to 1:5 of zirconium to triethanolamine with a mixture of polyols, which mixture comprises a hydroxyalkylated diamine and a hydrocarbon polyol wherein the molar ratio of zirconium to hydroxyalkylated diamine is 1:0.5 to 1:1 and the molar ratio of zirconium to hydrocarbon polyol is 1:0.5 to 1:1.5. The composition can be used in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.Type: GrantFiled: March 30, 2007Date of Patent: September 14, 2010Inventor: Donald Edward Putzig
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Patent number: 7795189Abstract: A process to prepare a solution of zirconium-hydroxyalkylated diamine-lactic acid complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting an alcohol solution of a zirconium complex with an hydroxyalkylated diamine, then with lactic acid to produce a solution of zirconium-hydroxyalkylated diamine-lactic acid complex. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at pH of 10 or greater and at temperatures of 275° F. (135° C.) and higher in the formation.Type: GrantFiled: December 28, 2007Date of Patent: September 14, 2010Inventor: Donald Edward Putzig
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Patent number: 7795190Abstract: A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with alkanolamine, then water and optionally and preferably a hydroxyalkylene diamine, then with a boron compound. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275° F. (135° C.) and higher in the formation.Type: GrantFiled: December 14, 2007Date of Patent: September 14, 2010Inventor: Donald Edward Putzig
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Patent number: 7790657Abstract: A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with a first alkanolamine, then water and optionally hydroxyalkylene diamine, then with a solution of a boron compound and a second alkanolamine. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275° F. (135° C.) and higher in the formation.Type: GrantFiled: December 17, 2007Date of Patent: September 7, 2010Inventor: Donald Edward Putzig
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Patent number: 7790822Abstract: A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A process to prepare the hyperbranched polymer comprises contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene having at least 7 carbon atoms in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions.Type: GrantFiled: July 15, 2009Date of Patent: September 7, 2010Inventors: Stephen Ernest Jacobson, Patricia Metzger Cotts
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Process to prepare zirconium-based cross-linker compositions and their use in oil field applications
Patent number: 7754660Abstract: A process to prepare a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting an alcohol solution of a zirconium complex with an alkanolamine, then with an ?-hydroxycarboxylic acid to produce a solution of zirconium-alkanolamine-hydroxycarboxylic acid complex. The solution is particularly suitable for use in a cross-linking composition in hydraulic fracturing and plugging of permeable zones of subterranean formations at temperatures of 275° F. (135° C.) and higher in the formation.Type: GrantFiled: December 18, 2007Date of Patent: July 13, 2010Assignee: E.I. du Pont de Nemours and CompanyInventor: Donald Edward Putzig -
Patent number: 7730952Abstract: A method for hydraulically fracturing a subterranean formation comprises introducing into the formation a cross-linking composition which comprises a zirconium triethanolamine complex, a tetra(hydroxyalkyl)ethylenediamine, water, a cross-linkable organic polymer, and optionally, a polyol. The method can be used for cross-linking organic polymers over a wide range of pH. By varying the composition and optionally adding a delay agent, the method provides flexibility in rate of cross-linking.Type: GrantFiled: February 14, 2006Date of Patent: June 8, 2010Assignee: E.I. duPont de Nemours and CompanyInventor: Donald Edward Putzig
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Patent number: 7732382Abstract: A cross-linking composition comprises (a) an aqueous liquid, (b) a pH buffer, (c) a cross-linkable organic polymer, (d) a cross-linking agent which comprises an organic titanate, an organic zirconate, or combinations thereof, and (e) a delay agent which is a hydroxyalkylaminocarboxylic acid. The composition provides flexibility in rate of cross-linking and can be used over a wide range of pH. Further disclosed are methods to use the composition in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.Type: GrantFiled: February 14, 2006Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventor: Donald Edward Putzig
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Patent number: 7732383Abstract: A process for preparing a stable zirconium triethanolamine cross-linking agent comprises contacting a solution of a zirconium triethanolamine complex with water at a temperature of 50° C. to 90° C. at a mole ratio of triethanolamine:zirconium in the range of 3.5:5.5 and at a mole ratio of water:zirconium in the range of 20:1 to 1:1. The stable zirconium triethanolamine complex can be used in a cross-linking composition. Further disclosed are methods to use the composition in oil field applications for hydraulic fracturing and plugging of permeable zones and leaks in subterranean formations.Type: GrantFiled: December 21, 2006Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventor: Donald Edward Putzig
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Patent number: 7732384Abstract: A process is provided to prepare solid borozirconate and solid borotitanate cross-linkers, which comprises contacting zirconium or titanium complex with alkanolamine at particular mole ratios of boron, zirconium or titanium and alkanolamine. Use of the cross-linkers in compositions for oil field applications such as hydraulic fracturing and plugging of permeable zones are also disclosed.Type: GrantFiled: December 21, 2007Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Donald Edward Putzig, Peter Jernakoff
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Patent number: 7579403Abstract: Stain resistant composition comprises a hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A method to provide stain resistance to a substrate comprises applying the stain resistant composition to said substrate. Suitable substrates include textiles and hard surfaces.Type: GrantFiled: April 4, 2006Date of Patent: August 25, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Stephen Ernest Jacobson, Patricia Metzger Cotts
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Patent number: 7579498Abstract: A process for preparing fluorinated alkyl carboxylate esters comprises reaction of a silver carboxylate or silver carboxylate precursor, such as silver (I) iodide with a fluorinated alkyl iodide and a carboxylic acid. Preferably the fluorinated alkyl iodide has the general formula CF3(CF2)nCH2CH2I, wherein n is an integer in the range of from 1 to 29 and the carboxylic acid is acetic acid, acrylic acid or methacrylic acid.Type: GrantFiled: November 29, 2005Date of Patent: August 25, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Mark Allen Andrews, Alexander Borisovich Shtarov, Joseph Norman Hockman
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Patent number: 7579420Abstract: A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic anhydride. Optionally, the hyperbranched polymer may further comprise polymer units derived from one or more 1-alkenes and/or a chain transfer agent. A process to prepare the hyperbranched polymer comprises contacting maleic anhydride with at least one terminally unsaturated acyclic aliphatic diene having at least 7 carbon atoms in the presence of an effective amount of a radical initiator in an aprotic solvent under dilute conditions.Type: GrantFiled: April 4, 2006Date of Patent: August 25, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Stephen Ernest Jacobson, Patricia Metzger Cotts
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Patent number: 7569527Abstract: Substituted aryl pnictogen derivative compositions having the structure of [Rf1-(CtR(u+v))]mE(O)n(CtR1(u+v+1))(3-m) wherein E is phosphorous, arsenic or antimony; Rf1 is a fluoropolyether chain; CtR(u+v) and CtR1(u+v+1) represent aryl groups, n is 0 or 1 and m is greater than about 0.5 to about 3. Such compositions have utility as additives for high temperature lubricants.Type: GrantFiled: June 27, 2005Date of Patent: August 4, 2009Assignee: E.I. duPont de Nemours and CompanyInventors: John Lee Howell, Kevin Anthony Hay
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Patent number: 7544646Abstract: A method of lubricating a sootblower comprising use of an oil or grease that is thermally stable at temperatures of at least 160° C. Sootblower components which can be lubricated include lance support bearings, gears, chains, seals, and shaft bearings. The oil or grease can be an ester, silicone, or halogenated oil or grease including perfluoropolyether or perfluoroalkyl ether, a fluorosilicone, a polytrifluorochloroethylene, derivatized perfluoropolyethers, such as fluoroether triazines, and mixtures of two or more thereof.Type: GrantFiled: September 30, 2005Date of Patent: June 9, 2009Inventors: Thomas Michael Band, H. Carl Walther, Jon Lee Howell