Patents by Inventor Weiming Qiu
Weiming Qiu 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: 20180358184Abstract: The present invention relates to a composition comprising one or more perovskite precursors dissolved in a mixture of solvents comprising: i. one or more polar aprotic solvents, each selected in such a way that it can, when used in absence of other components, dissolve said one or more perovskite precursors, ii. one or more linear alcohols of general formula CnH2n+1OH, wherein n is from 1 to 12, and iii. optionally, one or more acids wherein the polar aprotic solvent or mixture of polar aprotic solvents represent between 50 and 95 vol % of the mixture of solvents, wherein the vol % of the mixture of solvents not occupied by polar aprotic solvents is occupied for at least 90 vol %, preferably for 100 vol %, by the one or more linear alcohols, and the one or more acids if present.Type: ApplicationFiled: December 17, 2017Publication date: December 13, 2018Inventors: Jeffrey Gerhart Tait, Kira Gardner, Robert Gehlhaar, Weiming Qiu, Tamara Merckx
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Patent number: 9028727Abstract: Dielectric fluids are provided, the dielectric fluids comprising a mixture of polyol esters derived from a reaction of a) a polyol comprising pentaerythritol, trimethylolpropane, neopentyl glycol, or combinations thereof, and b) a mixture of fatty acid esters derived from a high oleic soybean oil comprising fatty acid moieties, wherein the high oleic soybean oil has a C18:1 content of greater than 65% of the fatty acid moieties in the oil, and a combined C18:2 and C18:3 content of less than 20% of the fatty acid moieties in the oil. Also provided are electrical apparatuses comprising the dielectric fluids, and processes for preparing the mixtures of polyol esters.Type: GrantFiled: August 24, 2012Date of Patent: May 12, 2015Assignee: E I du Pont de Nemours and CompanyInventors: Weiming Qiu, Peter A Brown
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Publication number: 20140131634Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131642Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131640Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131636Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131637Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140135522Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU, SAM COTTERILL, ERIK KELLER
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Publication number: 20140131641Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131639Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131635Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140131638Abstract: In the present invention, compositions that are suitable for use as dielectric fluids are obtained from renewably sourced oils, and blends thereof. Renewably sourced synthetic esters as described herein are prepared using components obtained from natural or biologic feedstocks, wherein the feedstocks can be regenerated via conventional farming techniques. Dielectric fluids that can meet the industry standards are obtained using a process of combining appropriate percentages of components selected from synthetic polyol esters, natural oils, and mineral oil to customize the properties of the dielectric fluid obtained. Some of the properties that can be manipulated in the practice of the present invention include: electrical strength, resistivity, impulse strength, dissipation factor, permittivity, specific heat, thermal conductivity, chemical stability, gas absorption, pour point, viscosity, volatility, flash and fire point, and biodegradability.Type: ApplicationFiled: November 12, 2013Publication date: May 15, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: HARI BABU SUNKARA, WEIMING QIU
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Publication number: 20140073707Abstract: Compositions comprising a fluorosurtactant and a fluoro-free hydrotrope are disclosed. The fluoro-free hydrotropes are cationic aromatic compounds, anionic aromatic compounds, or water soluble azo derivatives.Type: ApplicationFiled: September 13, 2012Publication date: March 13, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Thomas G. Calvarese, Weiming Qiu, Anilkumar Raghavanpillai, Yamaira Gonzalez
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Patent number: 8628682Abstract: Compositions comprising a fluorosurfactant and a hydrotrope are disclosed. The hydrotropes are either cationic or anionic benzene derivatives comprising fluoro-substituted functional groups and polar groups. The compositions are useful in various surfactant applications.Type: GrantFiled: October 24, 2011Date of Patent: January 14, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Thomas G. Calvarese, Yamaira Gonzalez, Viacheslav A. Petrov, Weiming Qiu, Anilkumar Raghavanpillai
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Publication number: 20130337249Abstract: Insulating materials are provided, the insulating materials comprising a nonwoven web comprising a plurality of continuous spunbonded polyester bicomponent fibers. Each of the plurality of bicomponent fibers comprises a) from about 20% by weight to about 80% by weight of poly(ethylene terephthalate) in a core, and b) from about 80% by weight to about 20% by weight of poly(trimethylene terephathalate) in a sheath surrounding the core, wherein the amounts in percent by weight are based on the total weight of each of the plurality of bicomponent fibers. Also provided are electrical apparatuses comprising the insulating materials and a dielectric fluid, as well as a dielectric material comprising the nonwoven web impregnated with at least 10 weight percent of a dielectric fluid.Type: ApplicationFiled: August 24, 2012Publication date: December 19, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Gyorgyi Fenyvesi, Mark Andrew Harmer, Byoung Sam Kang, Lakshmi Krishnamurthy, Serge Rebouillat, Peter A. Brown, Weiming Qiu
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Publication number: 20130225023Abstract: Dielectric fluids are provided, the dielectric fluids comprising a mixture of polyol esters derived from a reaction of a) a polyol comprising pentaerythritol, trimethylolpropane, neopentyl glycol, or combinations thereof, and b) a mixture of fatty acid esters derived from a high oleic soybean oil comprising fatty acid moieties, wherein the high oleic soybean oil has a C18:1 content of greater than 65% of the fatty acid moieties in the oil, and a combined C18:2 and C18:3 content of less than 20% of the fatty acid moieties in the oil. Also provided are electrical apparatuses comprising the dielectric fluids, and processes for preparing the mixtures of polyol esters.Type: ApplicationFiled: August 24, 2012Publication date: August 29, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Weiming Qiu, Peter A Brown
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Publication number: 20130102685Abstract: Compositions comprising a fluorosurfactant and a hydrotrope are disclosed. The hydrotropes are either cationic or anionic benzene derivatives comprising fluoro-substituted functional groups and polar groups. The compositions are useful in various surfactant applications.Type: ApplicationFiled: October 24, 2011Publication date: April 25, 2013Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Thomas G. Calvarese, Yamaira Gonzalez, Viacheslav A. Petrov, Weiming Qiu, Anilkumar Raghavanpillai
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Patent number: 8389657Abstract: A composition comprising a copolymer having repeating units in any sequence of Formula I wherein Rf is a straight or branched perfluoroalkyl group which is optionally interrupted by at least one oxygen atom, X3 is oxygen or X1, each X1 is independently an organic divalent linking group, G is F or CF3, A is an amide, X2 is an organic linking group, Y is O, N or S, Z is H, a straight or branched alkyl group or halide, B is H or wherein Rf, X1, X3, G, and A are as defined above, and each W is independently various copolymer units.Type: GrantFiled: April 13, 2012Date of Patent: March 5, 2013Assignee: E. I. du Pont de Nemours and CompanyInventor: Weiming Qiu
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Patent number: 8318877Abstract: A copolymer composition comprising monomers copolymerized in the following percentages by weight: (a) from about 20% to about 95% of a monomer, or mixture of monomers, of formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]m-L-C(O)—C(R)?CH2??(I) wherein R is H, Cl, F or CH3, L is O, S, NH, S—(CH2)rO, S—(CH2)rNH, OC(O)NH—CH2CH2O, NHC(O)NHCH2CH2O, S—(CH2)rOC(O)NHCH2CH2O, or S(CH2)rNHC(O)NHCH2CH2O, and (b) from about 5% to about 80% of at least one of: (i) an alkyl (meth)acrylate monomer having a linear, branched or cyclic alkyl group of from about 6 to about 18 carbons; or (II) a monomer of formula (II) (R2)2N—R3—O—C(O)—C(R)?CH2??(II) wherein R is H, Cl, F or CH3, each R2 is independently a C1 to C4 alkyl; and R3 is a divalent linear or branched C1 to C4 alkylene; and wherein the nitrogen is from about 40% to 100% salinized; or (iii) a mixture thereof.Type: GrantFiled: May 20, 2008Date of Patent: November 27, 2012Assignee: E.I. du Pont de Nemours and CompanyInventors: Weiming Qiu, Anilkumar Raghavanpillai, Peter Michael Murphy, Jessica Louise Flatter
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Publication number: 20120264972Abstract: A composition comprising a copolymer having repeating units in any sequence of Formula I wherein Rf is a straight or branched perfluoroalkyl group which is optionally interrupted by at least one oxygen atom, X3 is oxygen or X1, each X1 is independently an organic divalent linking group, G is F or CF3, A is an amide, X2 is an organic linking group, Y is O, N or S, Z is H, a straight or branched alkyl group or halide, B is H or wherein Rf, X1, X3, G, and A are as defined above, and each W is independently various copolymer units.Type: ApplicationFiled: April 13, 2012Publication date: October 18, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: WEIMING QIU