Patents by Inventor David J. Rodini

David J. Rodini 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).

  • Aramid copolymer yarn having low residual sulfur
    Patent number: 11279800
    Abstract: The present invention concerns yarn comprising polymer, the polymer comprising imidazole groups, the yarn having a sulfur content of 0.01 to 3.0 percent by weight, based on weight of the yarn, the yarn having a tenacity of 30 cN/dtex (33.3 gpd) or higher.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 22, 2022
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Christopher William Newton, David J. Rodini, Joseph Lenning Lowery, Steven R. Allen, Vlodek Gabara
  • Sulfur-containing imidazole fiber having ionically bonded halides
    Patent number: 10400082
    Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent; the fiber exhibiting hydrochloric acid evolution as identified by TGA-IR between 277.13° C. to 448.19° C.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 3, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J Rodini, Andrew J Sitter
  • Sulfur and alkali metal containing imidazole fiber having ionically bound halides
    Patent number: 10400357
    Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, the polymer further having: i) halide anions being present in an amount in the range of 0.05 to 20.1 weight percent, based on weight of fiber; ii) sulfur, wherein the sulfur is present in the fiber in an amount in the range of 0.05 to 3 weight percent, based on weight of fiber; and iii) alkali metal ion, wherein the alkali metal ion is present in the fiber in an amount in the range of 0.05 to 2 weight percent, based on weight of fiber, the fiber exhibiting hydrochloric acid evolution as identified by TGA-IR between 277.13° C. to 448.19° C.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 3, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J Rodini, Andrew J Sitter
  • Process for preparing aramid copolymer yarn using a halide acid wash
    Patent number: 10240282
    Abstract: The present invention concerns methods for removing sulfur from yarn comprising the steps of: a) contacting never-dried polymeric yarn with an aqueous base, the polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid comprising a halide; and c) rinsing the yarn.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 26, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • SULFUR AND ALKALI METAL CONTAINING IMIDAZOLE FIBER HAVING IONICALLY BOUND HALIDES
    Publication number: 20180245245
    Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, the polymer further having: i) halide anions being present in an amount in the range of 0.05 to 20.1 weight percent, based on weight of fiber; ii) sulfur, wherein the sulfur is present in the fiber in an amount in the range of 0.05 to 3 weight percent, based on weight of fiber; and iii) alkali metal ion, wherein the alkali metal ion is present in the fiber in an amount in the range of 0.05 to 2 weight percent, based on weight of fiber, the fiber exhibiting hydrochloric acid evolution as identified by TGA-IR between 277.13° C. to 448.19° C.
    Type: Application
    Filed: April 30, 2018
    Publication date: August 30, 2018
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • SULFUR-CONTAINING IMIDAZOLE FIBER HAVING IONICALLY BONDED HALIDES
    Publication number: 20180244891
    Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent; the fiber exhibiting hydrochloric acid evolution as identified by TGA-IR between 277.13° C. to 448.19° C.
    Type: Application
    Filed: April 30, 2018
    Publication date: August 30, 2018
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Sulfur and alkali metal containing imidazole fiber having ionically bound halides
    Patent number: 9994974
    Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, the polymer further having: i) halide anions being present in an amount in the range of 0.05 to 20.1 weight percent, based on weight of fiber; ii) sulfur, wherein the sulfur is present in the fiber in an amount in the range of 0.05 to 3 weight percent, based on weight of fiber; and iii) alkali metal ion, wherein the alkali metal ion is present in the fiber in an amount in the range of 0.05 to 2 weight percent, based on weight of fiber.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: June 12, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Sulfur-containing imidazole fiber having ionically bonded halides
    Patent number: 9988514
    Abstract: The present invention concerns fiber made from a polymer comprising imidazole groups, fiber further having: i) a halide anion, the halide anion being present in an amount of 0.05 to 20.1 weight percent, based on weight of fiber; and ii) sulfur, wherein the sulfur is present in the fiber in an amount of 0.05 to 3 weight percent.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: June 5, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Process for preparing aramid copolymer yarn using an acid wash
    Patent number: 9845553
    Abstract: The present invention concerns methods for removing sulfur from yarn comprising the steps of: a) contacting never-dried polymeric yarn with an aqueous base, the polymer comprising imidazole groups and said polymer comprising sulfur atoms characterized as being in the form of sulfate anions; b) contacting the yarn with an aqueous acid solution of pH 5 or lower; and c) rinsing the yarn.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: December 19, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Process for preparing aramid copolymer yarn having low residual sulfur
    Patent number: 9732442
    Abstract: The present invention concerns methods for producing a yarn comprising the steps of: (a) producing a plurality of dope filaments by spinning a polymer solution in sulfuric acid through a multi-hole spinneret, the polymer comprising imidazole groups; (b) coagulating the plurality of dope filaments into an as-spun yarn; (c) contacting the yarn with an aqueous base having a pKa less than or equal to 11; and (d) rinsing the yarn.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: August 15, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Method for removing sulfur from fiber using a weak base
    Patent number: 9469922
    Abstract: The present invention concerns methods for removing sulfur from a fiber comprising the steps of: a) contacting never-dried sulfur-containing fiber in a yarn with an aqueous base having a pKa less than or equal to 11 to release at least a portion of said sulfur, said sulfur comprising, at least in part, sulfate anions and said yarn comprising fiber derived from polymer comprising imidazole groups; and b) rinsing said yarn to remove at least a portion of released sulfur.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: October 18, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Method for removing sulfur from fiber using an aqueous acid
    Patent number: 9464370
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: contacting never-dried sulfate anion-containing polymeric-fiber with an aqueous acid having a pKa of less than 5 to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove the displaced sulfate ions.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: October 11, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Method for removing sulfur from fiber using halide acid ion exchange
    Patent number: 9464380
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion-containing polymeric-fiber with an halide-containing acid to displace at least a portion of the sulfate ions with halide anions; and b) rinsing the fiber to remove the displaced sulfate ions.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: October 11, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Process for preparing yarn derived from aramid copolymer fiber having low residual sulfur
    Patent number: 9315923
    Abstract: The present invention concerns processes for producing a yarn comprising polymer comprising imidazole groups, the process having the following steps: (a) spinning a solution of polymer in sulfuric acid to give rise to a plurality of dope filaments; (b) coagulating the plurality of dope filaments into a multi-filament as-spun yarn; and (c) washing the as-spun multi-filament yarn with an aqueous acid comprising a halide or an aqueous salt comprising a halide or combination thereof.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: April 19, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • Method for removing sulfur from fiber using halide salt ion exchange
    Patent number: 9284665
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion containing polymeric-fiber with an aqueous salt solution comprising halide anions to displace at least a portion of the sulfate anions with halide anions; and b) rinsing the fiber to remove displaced sulfate anions.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 15, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Christopher William Newton, David J. Rodini, Joseph Lenning Lowery, Steven R. Allen, Vlodek Gabara
  • Method for removing sulfur from fiber using monovalent salt ion exchange
    Patent number: 9080261
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion containing polymeric-fiber with aqueous salt having monovalent anions to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove displaced sulfate anions.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: July 14, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J. Rodini
  • METHOD FOR REMOVING SULFUR FROM FIBER USING HALIDE SALT ION EXCHANGE
    Publication number: 20150073118
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion containing polymeric-fiber with an aqueous salt solution comprising halide anions to displace at least a portion of the sulfate anions with halide anions; and b) rinsing the fiber to remove displaced sulfate anions.
    Type: Application
    Filed: January 11, 2012
    Publication date: March 12, 2015
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Christopher William Newton, David J. Rodini, Joseph Lenning Lowery, Steven R. Allen, Vlodek Gabara
  • METHOD FOR REMOVING SULFUR FROM FIBER USING MONOVALENT SALT ION EXCHANGE
    Publication number: 20150073119
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion containing polymeric-fiber with aqueous salt having monovalent anions to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove displaced sulfate anions.
    Type: Application
    Filed: January 11, 2012
    Publication date: March 12, 2015
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Christopher William Newton, David J. Rodini
  • METHOD FOR REMOVING SULFUR FROM FIBER USING AN AQUEOUS ACID
    Publication number: 20150047130
    Abstract: The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: contacting never-dried sulfate anion-containing polymeric-fiber with an aqueous acid having a pKa of less than 5 to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove the displaced sulfate ions.
    Type: Application
    Filed: January 11, 2012
    Publication date: February 19, 2015
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter
  • PROCESS FOR PREPARING YARN DERIVED FROM ARAMID COPOLYMER FIBER HAVING LOW RESIDUAL SULFUR
    Publication number: 20150021812
    Abstract: The present invention concerns processes for producing a yarn comprising polymer comprising imidazole groups, the process having the following steps: (a) spinning a solution of polymer in sulfuric acid to give rise to a plurality of dope filaments; (b) coagulating the plurality of dope filaments into a multi-filament as-spun yarn; and (c) washing the as-spun multi-filament yarn with an aqueous acid comprising a halide or an aqueous salt comprising a halide or combination thereof.
    Type: Application
    Filed: January 11, 2012
    Publication date: January 22, 2015
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven R. Allen, Vlodek Gabara, Joseph Lenning Lowery, Steven Raymond Lustig, Christopher William Newton, David J. Rodini, Andrew J. Sitter