Patents by Inventor Stephen William Sankey

Stephen William Sankey 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: 20240291105
    Abstract: A copolyester film comprising a copolyester which comprises repeating units derived from a diol, a dicarboxylic acid and a poly(alkylene oxide), wherein the copolyester film further comprises a first metal ion-containing component selected from conductive ceramic particulate materials, and wherein the film may further comprise additional metal ions from one or more sources other than said conductive ceramic particulate material.
    Type: Application
    Filed: July 29, 2022
    Publication date: August 29, 2024
    Applicant: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, Stephen Jones, Lucien Schosseler, Megan Alicia Meaburn, David Turner
  • Publication number: 20200231754
    Abstract: A process for preparing a thermoplastic copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester, wherein the process comprises the steps of: (i) reacting said aliphatic glycol with said aromatic dicarboxylic acid to form a bis(hydroxyalkyl)-ester of said aromatic dicarboxylic acid; and (ii) reacting said bis(hydroxyalkyl)-ester of said aromatic dicarboxylic acid with the monomer (I) under conditions of elevated temperature and pressure in the presence of a catalyst, wherein the monomer (I) is present in a range of from 5% to about 20 mol % of the glycol fraction of the copolyester, wherein the aromatic dicarboxylic acid is selected from naphthalene dicarboxylic acid and terephthalic acid, and wherein the aliphatic glycol is ethylene glycol.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 23, 2020
    Applicant: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, David Turner, Howard Colquhoun, Stephen Meehan
  • Patent number: 10450411
    Abstract: Disclosed herein are film, fiber, molding composition and molded article including copolyesters that exhibit improved heat-resistance and thermo-mechanical stability. The copolyester is derived from an aliphatic glycol, an aromatic dicarboxylic acid selected from naphthalene dicarboxylic acid and terephthalic acid, and 5-50 mol % (based on 100 mole % of all glycols) of an additional monomer, bis(2-hydroxyalkyl)-2,2?-(1,4-phenylene)bis(1,3-dioxoisoindoline-5-carboxylate). The aromatic dicarboxylic acid is at least one of naphthalene dicarboxylic acid and terephthalic acid and the aliphatic glycol is selected from C2, C3 or C4 aliphatic diols. Furthermore, the copolyesters have crystallinity of at least 10%.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: October 22, 2019
    Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Stephen William Sankey, David Turner, Howard Colquhoun, Stephen Jones
  • Patent number: 10377862
    Abstract: A copolyester includes repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4; Z is C?O; comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in a range of from about 5 to about 15 mol % of the glycol fraction of the copolyester; wherein said copolyester is semi-crystalline. A process tor making the copolyester includes annealing a copolyester of formula (I) at 20-80° C. below the crystalline melting point (Tm) and above the glass transition temperature (Tg).
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: August 13, 2019
    Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Stephen William Sankey, David Turner, Howard Colquhoun, Stephen Jones
  • Patent number: 9840590
    Abstract: A semi-crystalline biaxially oriented film comprising a copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (I) wherein n=2, 3 or 4, Z is C?O, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in an amount of at least about 4 mol % of the glycol fraction of the copolyester.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: December 12, 2017
    Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Stephen William Sankey, David Turner, Howard Colquhoun, Stephen Jones
  • Patent number: 9637588
    Abstract: A film comprising a copolyester wherein said copolyester comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and a comonomer (M) selected from the group consisting of N,N?-bis-(2-hydroxyalkyl)-bicyclo-[2,2,2]-oct-7-ene-2,3,5,6-tetracarboxylic diimide (BODI) and 2-hydroxyalkyl-2-[p-(2-hydroxyethoxycarbonyl)phenyl]-1,3-dioxo-2H-isoindole-5-carboxylate (DOIC), wherein the number of carbon atoms is the 2-hydroxyalkyl group is 2, 3 or 4, and wherein comonomer (M) constitutes a proportion of the glycol fraction of the copolyester.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: May 2, 2017
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, David Turner, Howard Colquhoun, Stephen Jones
  • Patent number: 9422399
    Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (Formula (I)) wherein n=2, 3 or 4, Z is S(?O)2, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester; and films, fibers, molding compositions or molded articles comprising said copolyester.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: August 23, 2016
    Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Stephen William Sankey, David Turner, Howard Colquhoun, Stephen Jones
  • Patent number: 9096724
    Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, naphthalene-dicarboxylic acid, and the monomer of formula (I) wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: August 4, 2015
    Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Stephen William Sankey, William A. Macdonald, David Turner, Howard Colquhoun, Stephen Meehan
  • Patent number: 9074052
    Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: July 7, 2015
    Assignee: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Stephen William Sankey, William A. MacDonald, David Turner, Howard Colquhoun, Stephen Meehan
  • Patent number: 8936852
    Abstract: A breathable, heat-sealable composite film comprising first and second layers of polymeric material wherein (i) the polymeric material of the first layer comprises copolyester comprising monomeric units derived from one or more diol(s); one or more dicarboxylic acid(s); and one or more poly(alkylene oxide)glycol(s); and (ii) the second layer is a heat-sealable polymeric layer, and a process for the production thereof.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: January 20, 2015
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, Dominic Hoy, David Turner
  • Publication number: 20140364582
    Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, terephthalic acid, and the monomer of formula (I): wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.
    Type: Application
    Filed: December 18, 2012
    Publication date: December 11, 2014
    Inventors: Stephen William Sankey, William A. MacDonald, David Turner, Howard Colquhoun, Stephen Meehan
  • Publication number: 20140350210
    Abstract: A copolyester comprising repeating units derived from an aliphatic glycol, naphthalene-dicarboxylic acid, and the monomer of formula (I) wherein n=2, 3 or 4, and films, fibres, moulding compositions and moulded articles made therefrom.
    Type: Application
    Filed: December 18, 2012
    Publication date: November 27, 2014
    Inventors: Stephen William Sankey, William A. Macdonald, David Turner, Howard Colquhoun, Stephen Meehan
  • Publication number: 20140283971
    Abstract: A radio-frequency (RF) responsive tag comprising a heat-sealing substrate comprising a polyester layer, and an antenna comprising a pattern of conductive material wherein said conductive material is in direct contact with a heat-sealing surface of the substrate, and wherein the shrinkage of the heat-sealing substrate is less than 5% at 190° C. over 30 minutes; a method of manufacture of said RF-response tag.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 25, 2014
    Applicant: DUPONT TEIJIN FILMS U.S. LIMITED PARTNERSHIP
    Inventors: Ken Evans, Stephen William Sankey, Dave Turner, Natalie Polack, Masahiko Kosuge, Peter N. Nugara
  • Patent number: 8586159
    Abstract: A breathable, heat-sealable, composite film comprising a perforated polymeric substrate layer having a first and second surface and disposed on a surface of the substrate layer an unperforated barrier layer wherein: (i) the thickness of the unperforated barrier layer is no more than about 12 pm; and (ii) the perforated substrate layer has a degree of perforation of from about 0.1 to about 78%, wherein the perforations have an average diameter of between 0.05 and 1.5 mm; and a process for the production thereof, suitable for use in the packaging of freshly cut plants such as flowers, vegetables, fruits and salads.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: November 19, 2013
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, Ken Evans, Pierre G. O. Moussalli, Stephen Keith Franzyshen, David Voisin
  • Publication number: 20130299374
    Abstract: A breathable, heat-sealable composite film comprising first and second layers of polymeric material wherein (i) the polymeric material of the first layer comprises copolyester comprising monomeric units derived from one or more diol(s); one or more dicarboxylic acid(s); and one or more poly(alkylene oxide)glycol(s); and (ii) the second layer is a heat-sealable polymeric layer, and a process for the production thereof.
    Type: Application
    Filed: March 18, 2013
    Publication date: November 14, 2013
    Inventors: Stephen William Sankey, Dominic Hoy, David Turner
  • Patent number: 8415011
    Abstract: A breathable, heat-sealable composite film comprising first and second layers of polymeric material wherein (i) the polymeric material of the first layer comprises copolyester comprising monomeric units derived from one or more diol(s); one or more dicarboxylic acid(s); and one or more poly(alkylene oxide) glycol(s); and (ii) the second layer is a heat-sealable polymeric layer, and a process for the production thereof.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: April 9, 2013
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, Dominic Hoy, David Turner
  • Patent number: 8394470
    Abstract: An open-ended tube comprising walls of a heat-sealable multi-layer polymeric film, wherein said film comprises an outer shrinkable substrate layer and an inner heat-sealable layer, wherein said substrate layer has a degree of shrinkage in the longitudinal dimension of the tube of about 0% to about 50% over the temperature range 55 to 100° C., and a degree of shrinkage in the transverse dimension of the tube of 5 to about 70% over the temperature range 55 to 100° C.; and use thereof in the manufacture of packaging for a container suitable as a receptacle for a ready-prepared ovenable meal.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: March 12, 2013
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Mark Edward Dawes, Gary Victor Rhoades, Stephen William Sankey
  • Patent number: 8202612
    Abstract: A heat-sealable, peelable, coextruded composite polymeric film comprising a substrate layer of polymeric material having on a surface thereof a heat-sealable layer, wherein said heat-sealable layer comprises a copolyester of least one aromatic dicarboxylic acid, at least one aliphatic dicarboxylic acid and one or more glycol(s); the thickness of said heat-sealable layer is in the range of from about 0.3 to about 3 ?m; and the heat-sealable layer comprises one or more wax(es) is described.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: June 19, 2012
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: William J. Brennan, Stephen William Sankey, Mark Russell Hodgson
  • Patent number: 8197925
    Abstract: A heat-scalable, composite film said film comprising a polymeric substrate layer having a first and second surface and disposed on a surface of the substrate layer a water-soluble barrier layer, wherein (i) the substrate layer has one or more venting means therein; and (ii) the thickness of the barrier layer is from about 0.05 to about 40 ?m; a process for the manufacture thereof; and use thereof as a self-venting film in the packaging of an ovenable meal.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: June 12, 2012
    Assignee: DuPont Teijin Films U.S. Limited Partnership
    Inventors: Stephen William Sankey, Ken Evans, David Voisin, Stephen Keith Franzyshen
  • Publication number: 20110198359
    Abstract: An open-ended tube comprising walls of a heat-sealable multi-layer polymeric film, wherein said film comprises an outer shrinkable substrate layer and an inner heat-sealable layer, wherein said substrate layer has a degree of shrinkage in the longitudinal dimension of the tube of about 0% to about 50% over the temperature range 55 to 100° C., and a degree of shrinkage in the transverse dimension of the tube of 5 to about 70% over the temperature range 55 to 100° C.; and use thereof in the manufacture of packaging for a container suitable as a receptacle for a ready-prepared ovenable meal.
    Type: Application
    Filed: April 27, 2011
    Publication date: August 18, 2011
    Applicant: Dupont Teijin Films U.S. Limited Partnership
    Inventors: Mark Edward Dawes, Gary Victor Rhoades, Stephen William Sankey