Patents by Inventor Robert C. Nahas

Robert C. Nahas 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: 11359097
    Abstract: A coating for protecting a substrate from corrosion includes a first layer having a first composition applied on the substrate. The coating has a thickness of at least 0.5 ?m. The first composition includes an intercalated mixture of a polymer and a clay according to a formula of (Px/C1-x)v, where v comprises a volume of the intercalated mixture applied to the substrate.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: June 14, 2022
    Assignee: The Texas A&M University System
    Inventors: Jodie L. Lutkenhaus, Pilar C. Suarez-Martinez, Robert C. Nahas, Jerome R. Robinson
  • Patent number: 10934438
    Abstract: Coatings and methods of using and producing the same are provided. In an exemplary embodiment, a coating includes a first ligand and a second ligand different than the first ligand. The first ligand includes a first carboxylic moiety, a first aromatic moiety, and a first linking moiety connecting the first carboxylic moiety to the first aromatic moiety. the first linking moiety includes an alkene. The second ligand includes a second carboxylic moiety. The coating includes a metal that is a lanthanoid metal, and the coating includes a coating resin.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: March 2, 2021
    Assignee: AXALTA COATING SYSTEMS IP CO., LLC
    Inventors: Eric J. Schelter, Alexander V. Zabula, Robert C. Nahas, Jerome R. Robinson, Eric C. Houze, Gaurang Bhargava, Michael Kerins, Jr.
  • Publication number: 20190211213
    Abstract: A coating for protecting a substrate from corrosion includes a first layer having a first composition applied on the substrate. The coating has a thickness of at least 0.5 ?m. The first composition includes an intercalated mixture of a polymer and a clay according to a formula of (Px/C1-x)v, where v comprises a volume of the intercalated mixture applied to the substrate.
    Type: Application
    Filed: September 5, 2017
    Publication date: July 11, 2019
    Applicant: The Texas A&M University System
    Inventors: Jodie L. Lutkenhaus, Pilar C. Suarez-Martinez, Robert C. Nahas, Jerome R. Robinson
  • Publication number: 20180312701
    Abstract: Coatings and methods of using and producing the same are provided. In an exemplary embodiment, a coating includes a first ligand and a second ligand different than the first ligand. The first ligand includes a first carboxylic moiety, a first aromatic moiety, and a first linking moiety connecting the first carboxylic moiety to the first aromatic moiety. the first linking moiety includes an alkene. The second ligand includes a second carboxylic moiety. The coating includes a metal that is a lanthanoid metal, and the coating includes a coating resin.
    Type: Application
    Filed: April 23, 2018
    Publication date: November 1, 2018
    Applicants: AXALTA COATING SYSTEMS IP CO., LLC, The Trustees of the University of Pennsylvania
    Inventors: Eric J. Schelter, Alexander V. Zabula, Robert C. Nahas, Jerome R. Robinson, Eric C. Houze, Gaurang Bhargava, Michael Kerins, JR.
  • Patent number: 9606076
    Abstract: The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in a stepwise manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: March 28, 2017
    Assignee: AXALTA COATING SYSTEMS IP CO., LLC
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Patent number: 9476820
    Abstract: A corrosion resistance evaluator is provided for evaluating corrosion resistance of coated metals substrates, such as autobodies, at an accelerated rate. The evaluator includes a chamber for retaining an electrolyte that is exposed to an anode and cathode coated with protective coating being tested. These anode and cathode coatings are provided with predetermined and standardized defects, such as micro-holes, to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The evaluator further comprises an anode holder and a cathode holder for testing the corrosion resistance of the anode and cathode coatings. The evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: October 25, 2016
    Assignee: AXALTA COATING SYSTEMS IP CO., LLC
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Patent number: 9212986
    Abstract: The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at an accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in triangular, truncated triangular or trapezoidal manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: December 15, 2015
    Assignee: AXALTA COATING SYSTEMS IP CO., LLC
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C Nahas
  • Publication number: 20150060273
    Abstract: A corrosion resistance evaluator is provided for evaluating corrosion resistance of coated metals substrates, such as autobodies, at an accelerated rate. The evaluator includes a chamber for retaining an electrolyte that is exposed to an anode and cathode coated with protective coating being tested. These anode and cathode coatings are provided with predetermined and standardized defects, such as micro-holes, to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The evaluator further comprises an anode holder and a cathode holder for testing the corrosion resistance of the anode and cathode coatings. The evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Application
    Filed: September 23, 2014
    Publication date: March 5, 2015
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Patent number: 8888976
    Abstract: The present invention is directed to a corrosion resistance evaluator suitable for corrosion testing coated metals substrates, such as autobodies. A corrosion resistance evaluator provided with a chamber containing electrolyte to which anode and cathode coated with protective coating being tested are exposed. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages for preset durations that are interspaced with recovery periods. The impedance date collected is then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: November 18, 2014
    Assignee: Axalta Coating Systems IP Co., LLC
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Patent number: 8723535
    Abstract: The present invention is directed to a process for corrosion resistance evaluation of coated metals substrates, such as autobodies. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: May 13, 2014
    Assignee: Axalta Coating Systems IP Co., LLC
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Publication number: 20140097096
    Abstract: The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at an accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in triangular, truncated triangular or trapezoidal manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Application
    Filed: December 21, 2011
    Publication date: April 10, 2014
    Applicant: U.S. COATING IP CO. LLC
    Inventors: Shi Hua Zhang, Lorenz Fred Pelosi, Robert C. Nahas
  • Publication number: 20130325364
    Abstract: The present invention is directed to a process for evaluating corrosion resistance of coated metals substrates, such as autobodies at accelerated rate. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages modulated in a stepwise manner for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Application
    Filed: December 21, 2011
    Publication date: December 5, 2013
    Applicant: US COATINGS IP CO. LLC
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Publication number: 20120302693
    Abstract: The present disclosure relates to a coating composition comprising a fluoropolymer, especially a fluorine containing graft copolymer. A dried and cured layer of the coating composition can provide a substrate with an easy to clean surface having a high water contact angle and good recoat adhesion.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 29, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: ROBERT C NAHAS, Andrew P Stamegna
  • Publication number: 20120095698
    Abstract: The present invention is directed to a process for corrosion resistance evaluation of coated metals substrates, such as autobodies. An anode and cathode coated with protective coating being tested are exposed to an electrolyte in a chamber of a corrosion resistance evaluator. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages for preset durations that are interspaced with recovery periods. The impedance data collected are then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Application
    Filed: January 4, 2010
    Publication date: April 19, 2012
    Applicant: E.I.DuPont De Nemours and Company
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Publication number: 20110315550
    Abstract: The present invention is directed to a corrosion resistance evaluator suitable for corrosion testing coated metals substrates, such as autobodies. A corrosion resistance evaluator provided with a chamber containing electrolyte to which anode and cathode coated with protective coating being tested are exposed. These coatings are provided with predetermined and standardized defects, such as micro-holes to accelerate the corrosion of the underlying metal substrate in a predictable and repeatable manner. The coated cathode/anode pair is subject to a start-up period followed by series preset DC voltages for preset durations that are interspaced with recovery periods. The impedance date collected is then used to arrive at the corrosion performance resistance of the coating applied over the cathode/anode pair. The foregoing evaluator substantially reduces the time required to test corrosion from several days (40 plus days) to few days (about two days).
    Type: Application
    Filed: January 4, 2010
    Publication date: December 29, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
  • Publication number: 20040134795
    Abstract: This invention pertains to the protection of metals from corrosion and/or fouling from exposure to environments such as, for example, seawater. The protection in accordance with this invention is achieved through the use of conductive zinc-containing coatings in combination with applied current cathodic protection.
    Type: Application
    Filed: July 23, 2003
    Publication date: July 15, 2004
    Inventors: Daniel R. Demarco, Basil V. Gregorovich, Robert C. Nahas, Shi Hua Zhang
  • Patent number: 4713265
    Abstract: A process for curing a coating composition with a vaporous amine catalyst, wherein the composition has as the binder A. an acrylic polymer containing hydroxyl groups and amine containing groups and has a weight average molecular weight of about 2,000-50,000 andB. an aliphatic polyisocyanate.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: December 15, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert C. Nahas, Clifford H. Strolle
  • Patent number: 4659799
    Abstract: A coating composition that can be cured with a vaporous amine catalyst, cured by baking at elevated temperatures or can be cured at ambient temperatures which has as the binderA. an acrylic polymer containing hydroxyl groups and amine containing groups and has a weight average molecular weight of about 2,000-50,000 andB. an aliphatic polyisocyanate.
    Type: Grant
    Filed: December 3, 1985
    Date of Patent: April 21, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert C. Nahas, Clifford H. Strolle