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).

  • Publication number: 20190359734
    Abstract: Compositions are disclosed herein comprising one or more crosslinked dextrans or crosslinked dextran-poly alpha-1,3-glucan graft copolymers. Further disclosed are processes for preparing such crosslinked materials, as well as their use in absorption applications.
    Type: Application
    Filed: February 13, 2018
    Publication date: November 28, 2019
    Inventors: Weiming Qiu, Douglas J. Adelman, Geraldine M. Direnzo
  • Publication number: 20190309096
    Abstract: The disclosure relates to compositions comprising a poly alpha-1,3-glucan derivative. The poly alpha-1,3-glucan derivative is a poly alpha-1,3-glucan polymer wherein the polymer is substituted with at least one polyether group and/or polyamine group. Compositions comprising the poly alpha-1,3-glucan derivative are useful as detergent compositions.
    Type: Application
    Filed: June 12, 2017
    Publication date: October 10, 2019
    Applicant: E I du Pont de Nemours and Company
    Inventors: Helen S M LU, Weiming QIU
  • Publication number: 20180358184
    Abstract: 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: Application
    Filed: December 17, 2017
    Publication date: December 13, 2018
    Inventors: Jeffrey Gerhart Tait, Kira Gardner, Robert Gehlhaar, Weiming Qiu, Tamara Merckx
  • Patent number: 9028727
    Abstract: 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: Grant
    Filed: August 24, 2012
    Date of Patent: May 12, 2015
    Assignee: E I du Pont de Nemours and Company
    Inventors: Weiming Qiu, Peter A Brown
  • Publication number: 20140073707
    Abstract: 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: Application
    Filed: September 13, 2012
    Publication date: March 13, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Thomas G. Calvarese, Weiming Qiu, Anilkumar Raghavanpillai, Yamaira Gonzalez
  • Patent number: 8628682
    Abstract: 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: Grant
    Filed: October 24, 2011
    Date of Patent: January 14, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Thomas G. Calvarese, Yamaira Gonzalez, Viacheslav A. Petrov, Weiming Qiu, Anilkumar Raghavanpillai
  • Publication number: 20130337249
    Abstract: 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: Application
    Filed: August 24, 2012
    Publication date: December 19, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Gyorgyi Fenyvesi, Mark Andrew Harmer, Byoung Sam Kang, Lakshmi Krishnamurthy, Serge Rebouillat, Peter A. Brown, Weiming Qiu
  • Publication number: 20130225023
    Abstract: 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: Application
    Filed: August 24, 2012
    Publication date: August 29, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Weiming Qiu, Peter A Brown
  • Publication number: 20130102685
    Abstract: 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: Application
    Filed: October 24, 2011
    Publication date: April 25, 2013
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Thomas G. Calvarese, Yamaira Gonzalez, Viacheslav A. Petrov, Weiming Qiu, Anilkumar Raghavanpillai
  • Patent number: 8389657
    Abstract: 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: Grant
    Filed: April 13, 2012
    Date of Patent: March 5, 2013
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Weiming Qiu
  • Patent number: 8318877
    Abstract: 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: Grant
    Filed: May 20, 2008
    Date of Patent: November 27, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Anilkumar Raghavanpillai, Peter Michael Murphy, Jessica Louise Flatter
  • Patent number: 8212064
    Abstract: An oligomer of the formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]mG??(I) wherein G is an I; OH; OC(O)CH?CH2; OC(O)CCH3?CH2; OC(O)CCl?CH2; NR1H; N3; NCO; SQ wherein Q is H, alkyl, (CH2)nOH, (CH2)nNH2, (CH2)nOC(O)C(Me)=CH2, or (CH2)nNHC(O)C(Me)=CH2; SCN; COOH; SO3H; NHCOCH?CH2; NHCOC(CH3)?CH2); OC(O)NHCH2CH2OC(O)C(CH3)?CH2; or OC(O)NHCH2CH2OC(O)C(CH3)?CH2; subscript n is an integer from 1 to about 6, subscript x is an integer from 1 to about 6, subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof, the total number of carbons in said formula (I) excluding G ranges from about 8 to about 22, and a process for preparation thereof.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: July 3, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Anilkumar Raghavanpillai, Michael Francis Vincent
  • Patent number: 8178638
    Abstract: 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: Grant
    Filed: May 26, 2010
    Date of Patent: May 15, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Weiming Qiu
  • Patent number: 8128711
    Abstract: A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r—xH??(I) wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms; the total number of carbons in said formula (I) excluding (R1)r—XH ranges from about 8 to about 22; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: March 6, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai
  • Patent number: 8058375
    Abstract: Provided are polyfluorinated carboxylic acids and their salts containing an ethylene-tetrafluoroethylene moiety. The polyfluorinated carboxylic acids and salts are useful as surfactants in polymerization processes.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: November 15, 2011
    Assignee: E I. du Pont de Nemours and Company
    Inventor: Weiming Qiu
  • Patent number: 8049040
    Abstract: Fluorophosphate containing an ethylene-tetrafluoroethylene moiety of formula (I) or (II): (A)w-P(O)(O?M+)3-w??(I) or wherein A is Rf—(CH2)k—[(CF2CF2)y—(CH2CH2)z]mO and contains from about 8 to about 22 carbon atoms; Rf is CnF2n+1; n and k are each independently 1 to about 6; y, z, and m are each independently 1, 2, 3, or mixture thereof; w is 1 or 2 or a mixture thereof; and M is hydrogen, ammonium ion, an alkali metal ion, or an alkanolammonium ion, said fluorophosphate useful as a surfactant for altering the surface behavior of a liquid by addition thereto, and for providing surface effects to a substrate treated with a composition containing the fluorophosphate.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: November 1, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Xiuling Shirley Wang
  • Publication number: 20110217506
    Abstract: A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r—XH??(I) wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms; subscript x is 1 to about 6; subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof; subscript r is 0 or 1; the total number of carbons in said formula (I) excluding (R1)r—XH ranges from about 8 to about 22; X is —O—, —NR—, —S—, —S(CH2)tO—, or —S(CH2)tNR—; subscript t is from 1 to about 10; R is H or C1-4 alkyl; R1 is certain divalent radicals; n is 2 to 4; s is 1 to about 50; R2, R3, and R4 are each independently hydrogen or a C1-C6 alkyl group; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 8, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai
  • Patent number: 7968669
    Abstract: A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r-xH??(I) wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms; the total number of carbons in said formula (I) excluding (R1)r-XH ranges from about 8 to about 22; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: June 28, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai
  • Publication number: 20100233419
    Abstract: A composition comprising a copolymer having repeating units in any sequence of Formula I wherein Rf is a straight or branched perfluoroalkyl group having from about 1 to about 20 carbon atoms, or a mixture thereof, which is optionally interrupted by at least one oxygen atom, X3 is oxygen or X1, each X1 is independently an organic divalent linking group having from about 1 to about 20 carbon atoms, optionally containing an oxygen, nitrogen, or sulfur, or a combination thereof, G is F or CF3, A is an amide, j is zero or positive integer, X2 is an organic linking group, Y is O, N or S, h is zero when Y is N, and h is one when Y is O or S, Z is H, a straight or branched alkyl group having from about 1 to about 4 carbon atoms, or halide, B is H or wherein Rf, X1, X3, G, A, and j are as defined above, provided that when B is H, j is a positive integer, m is a positive integer, q is zero or a positive integer when Y is O, and q is a positive integer when Y is N or S, p is zero or a positive integer
    Type: Application
    Filed: May 26, 2010
    Publication date: September 16, 2010
    Applicant: E.I.DU PONT DE NEMOURS AND COMPANY
    Inventor: Weiming Qiu
  • Patent number: 7754838
    Abstract: A composition comprising a copolymer having repeating units in any sequence of Formula I wherein Rf is a straight or branched perfluoroalkyl group having from about 1 to about 20 carbon atoms, or a mixture thereof, which is optionally interrupted by at least one oxygen atom, X3 is oxygen or X1, each X1 is independently an organic divalent linking group having from about 1 to about 20 carbon atoms, optionally containing an oxygen, nitrogen, or sulfur, or a combination thereof, G is F or CF3, A is an amide, j is zero or positive integer, X2 is an organic linking group, Y is O, N or S, h is zero when Y is N, and h is one when Y is O or S, Z is H, a straight or branched alkyl group having from about 1 to about 4 carbon atoms, or halide, B is H or wherein Rf, X1, X3, G, A, and j are as defined above, provided that when B is H, j is a positive integer, m is a positive integer, q is zero or a positive integer when Y is O, and q is a positive integer when Y is N or S, p is zero or a positive integer
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: July 13, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Weiming Qiu