Patents by Inventor Anilkumar Raghavanpillai

Anilkumar Raghavanpillai 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).

  • 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: 20110143622
    Abstract: Disclosed are fluorinated acrylate compounds.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 16, 2011
    Applicant: E.I. DUPONT DE NEMOURS AND COMPANY
    Inventor: ANILKUMAR RAGHAVANPILLAI
  • Publication number: 20110092410
    Abstract: Fluoroalkyl phosphates containing a tertiary carbon and a nonfluorinated chain are provided. The fluoroalkyl phosphates are useful as surfactants and additives for coating compositions and as treatment agents to impart various surface properties to substrates.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 21, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Anilkumar Raghavanpillai
  • Publication number: 20110091408
    Abstract: Fluoroalkyl phosphates containing a tertiary carbon and a nonfluorinated chain are useful as surfactants and additives. The f can be used to alter a surface property of a medium and to provide resistance to blocking, open time extension, or oil repellency to a substrate.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 21, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Anilkumar Raghavanpillai
  • Patent number: 7842626
    Abstract: Partially fluorinated amino acid derivatives are provided that are useful as organogelators and surface treatment materials to provide oil- and water- repellency properties to substrates. Also provided are composite materials comprising a porous support and a porous nanoweb. The porous nanoweb contains fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: November 30, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Erick Jose Acosta, Anilkumar Raghavanpillai, Sheng Peng, Stefan Reinartz
  • Publication number: 20100099837
    Abstract: A fluorinated polyoxyalkylene glycol diester surfactant of formula 1 B—X—COCH2O—[—CpH2pO—]n—CH2CO—X—Ra ??(1) wherein B is M or Ra, M is an ionizable hydrogen, ammonium, alkali metal, or alkaline earth metal, p is from about 2 to about 4, n is from about 5 to about 43, X is O, S, or SCH2CH2O, Ra is Rf(CH2CF2)d—(CgH2g)—; Rf[OCF2CF2]r(CgH2g)—; Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k—; or RfOY—; Y is CFHCF2O(CH2CH2O)v—(CgH2g)—; CFHCF2O(CwH2w)—; or CF(CF3)CONH—(CgH2g)—; each Rf is independently CcF(2c+1) wherein c is 1 to about 6; d is 1 to about 3; g is 1 to about 4; s is 0 or 1; r is 1 to about 4; h is 1 to about 6; i, j, and k are each independently 1, 2, or 3, or a mixture thereof; provided that the total number of carbon atoms in Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k—is from about 8 to about 22; v is 1 to about 4; and w is from about 2 to about 12.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 22, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Peter Michael Murphy, Anilkumar Raghavanpillai
  • Publication number: 20100099839
    Abstract: A fluorinated polyoxyalkylene glycol diamide surfactant of formula 1 B—X—COCH2O—[—CpH2pO—]n—CH2CO—X—Ra ??(1) wherein B is M or Ra, M is an ionizable hydrogen, ammonium, alkali metal, or alkaline earth metal, p is from about 2 to about 4, n is from about 5 about 43, each X is independently NR, SCH2CH2NR, SO2NRCH2CH2NR, or SO2CH2CH2NR; R is hydrogen, or a linear or branched alkyl group CbH(2b+1) wherein b is 1 to about 18, Ra is Rf(CH2CF2)d—(CgH2g)—; Rf(OCF2CF2)r—(CgH2g)—; RfOY—; Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k—; Rf(CgH2g)—; or H(CcF2c)—(CgH2g)—; Y is CFHCF2O(CwH2w)—; or CF(CF3)CONH—(CgH2g)—; and each Rf is independently CcF(2c+1) wherein c is 1 to about 6.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 22, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: PETER MICHAEL MURPHY, ANILKUMAR RAGHAVANPILLAI
  • Publication number: 20090291222
    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: Application
    Filed: May 20, 2008
    Publication date: November 26, 2009
    Applicant: E. I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Anilkumar Raghavanpillai, Peter Michael Murphy, Jessica Louise Flatter
  • Publication number: 20090286949
    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, 2008
    Publication date: November 19, 2009
    Applicant: E. I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai
  • Publication number: 20090287010
    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: Application
    Filed: May 14, 2008
    Publication date: November 19, 2009
    Applicant: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Anilkumar Raghavanpillai, Michael Francis Vincent
  • Publication number: 20090047498
    Abstract: One aspect of the invention is a method for making a composite material comprising a porous support and a porous nanoweb comprising: (a) providing a porous support; (b) providing a gelling mixture comprising one or more solvent(s) and one or more organogelator(s); (c) applying the gelling mixture to the porous support; (d) inducing said organogelator(s) to form a nanoweb gel; and (e) removing the solvent(s) from the nanoweb gel to provide a dry porous nanoweb coating on said porous support; wherein the one or more solvent(s) is a supercritical fluid. Preferably the supercritical fluid is carbon dioxide. Other embodiments of the invention include a nanoweb composite provided by the method.
    Type: Application
    Filed: August 13, 2007
    Publication date: February 19, 2009
    Applicant: E. I. duPont de Nemours and Company
    Inventors: Keith Ward Hutchenson, Matthew Arthur Page, Anilkumar Raghavanpillai, Stefan Reinartz, Cheryl Marie Stancik, Judith Johanna Van Gorp
  • Publication number: 20090047435
    Abstract: One aspect of the invention is a compound of formula (I) Ro-[L-(CqH2qS)pCrH2rRf]2??(I) wherein Ro is a divalent organic group having 2 to 40 carbon atoms; L is a linking group selected from —NHC(O)NH— or —C(O)NH— wherein the left side of the linking group is bonded to Ro; p is an integer of 0 or 1; q is an integer of 2 to 10; r is an integer of 1 to 10; and Rf is a linear or branched C1-C6 perfluoroalkyl group. Another aspect of the invention is a composite material comprising a porous support and a porous nanoweb, wherein said porous nanoweb comprises fibrous structures of between about 10 nm and about 1000 nm effective average fiber diameter as determined with electron microscopy; said fibrous structures being comprised of one or more compositions of formula (I). Another aspect of the invention is a method for making a composite material comprising a porous support and a porous nanoweb.
    Type: Application
    Filed: August 13, 2007
    Publication date: February 19, 2009
    Inventors: Keith Ward Hutchenson, Anilkumar Raghavanpillai, Stefan Reinartz
  • Patent number: 7473658
    Abstract: Disclosed are partially fluorinated amino acid derivatives useful as organogelators and surface treatment materials to provide oil- and water-repellency properties to substrates. Also disclosed are composite materials, comprising a porous support and a porous nanoweb. The porous nanoweb contains fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter as determined with electron microscopy.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: January 6, 2009
    Assignee: E. I. du Pont Nemours and Company
    Inventors: Erick Jose Acosta, Anilkumar Raghavanpillai, Sheng Peng, Stefan Reinartz, Sunti Moudgil
  • Publication number: 20080113573
    Abstract: Disclosed are partially fluorinated amino acid derivatives useful as organogelators and surface treatment materials to provide oil- and water-repellency properties to substrates. Also disclosed are composite materials, comprising a porous support and a porous nanoweb. The porous nanoweb contains fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter as determined with electron microscopy.
    Type: Application
    Filed: November 13, 2006
    Publication date: May 15, 2008
    Inventors: Erick Jose Acosta, Anilkumar Raghavanpillai, Sheng Peng, Stefan Reinartz, Suniti Moudgil
  • Publication number: 20080113172
    Abstract: Partially fluorinated amino acid derivatives are provided that are useful as organogelators and surface treatment materials to provide oil- and water-repellency properties to substrates. Also provided are composite materials comprising a porous support and a porous nanoweb. The porous nanoweb contains fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter.
    Type: Application
    Filed: November 13, 2006
    Publication date: May 15, 2008
    Inventors: Erick Jose Acosta, Anilkumar Raghavanpillai, Sheng Peng, Stefan Reinartz
  • Patent number: 6653515
    Abstract: &agr;,&bgr;,&bgr;-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amine to form a trifluorovinyl metal complex. In the second step, the trifluorostyrene or derivative is obtained by reacting the trifluorovinyl metal complex with an aryl transfer agent such as, for example, an aryl triflate or an aryl halide, in the presence of a metal catalyst and optionally a coordinating ligand. Both steps may be carried out in one reactor.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: November 25, 2003
    Assignee: Ballard Power Systems Inc.
    Inventors: Charles Stone, Timothy J. Peckham, Donald J. Burton, Anilkumar Raghavanpillai
  • Publication number: 20030144439
    Abstract: &agr;,&bgr;,&bgr;-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amine to form a trifluorovinyl metal complex. In the second step, the trifluorostyrene or derivative is obtained by reacting the trifluorovinyl metal complex with an aryl transfer agent such as, for example, an aryl triflate or an aryl halide, in the presence of a metal catalyst and optionally a coordinating ligand. Both steps may be carried out in one reactor.
    Type: Application
    Filed: December 14, 2001
    Publication date: July 31, 2003
    Applicant: Ballard Power Systems Inc.
    Inventors: Charles Stone, Timothy J. Peckham, Donald J. Burton, Anilkumar Raghavanpillai