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).
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Patent number: 11359097Abstract: 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: GrantFiled: September 5, 2017Date of Patent: June 14, 2022Assignee: The Texas A&M University SystemInventors: Jodie L. Lutkenhaus, Pilar C. Suarez-Martinez, Robert C. Nahas, Jerome R. Robinson
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Patent number: 10934438Abstract: 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: GrantFiled: April 23, 2018Date of Patent: March 2, 2021Assignee: AXALTA COATING SYSTEMS IP CO., LLCInventors: Eric J. Schelter, Alexander V. Zabula, Robert C. Nahas, Jerome R. Robinson, Eric C. Houze, Gaurang Bhargava, Michael Kerins, Jr.
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Publication number: 20190211213Abstract: 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: ApplicationFiled: September 5, 2017Publication date: July 11, 2019Applicant: The Texas A&M University SystemInventors: Jodie L. Lutkenhaus, Pilar C. Suarez-Martinez, Robert C. Nahas, Jerome R. Robinson
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Publication number: 20180312701Abstract: 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: ApplicationFiled: April 23, 2018Publication date: November 1, 2018Applicants: AXALTA COATING SYSTEMS IP CO., LLC, The Trustees of the University of PennsylvaniaInventors: Eric J. Schelter, Alexander V. Zabula, Robert C. Nahas, Jerome R. Robinson, Eric C. Houze, Gaurang Bhargava, Michael Kerins, JR.
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Patent number: 9606076Abstract: 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: GrantFiled: December 21, 2011Date of Patent: March 28, 2017Assignee: AXALTA COATING SYSTEMS IP CO., LLCInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Patent number: 9476820Abstract: 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: GrantFiled: September 23, 2014Date of Patent: October 25, 2016Assignee: AXALTA COATING SYSTEMS IP CO., LLCInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Patent number: 9212986Abstract: 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: GrantFiled: December 21, 2011Date of Patent: December 15, 2015Assignee: AXALTA COATING SYSTEMS IP CO., LLCInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C Nahas
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Publication number: 20150060273Abstract: 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: ApplicationFiled: September 23, 2014Publication date: March 5, 2015Inventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Patent number: 8888976Abstract: 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: GrantFiled: January 4, 2010Date of Patent: November 18, 2014Assignee: Axalta Coating Systems IP Co., LLCInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Patent number: 8723535Abstract: 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: GrantFiled: January 4, 2010Date of Patent: May 13, 2014Assignee: Axalta Coating Systems IP Co., LLCInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Publication number: 20140097096Abstract: 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: ApplicationFiled: December 21, 2011Publication date: April 10, 2014Applicant: U.S. COATING IP CO. LLCInventors: Shi Hua Zhang, Lorenz Fred Pelosi, Robert C. Nahas
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Publication number: 20130325364Abstract: 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: ApplicationFiled: December 21, 2011Publication date: December 5, 2013Applicant: US COATINGS IP CO. LLCInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Publication number: 20120302693Abstract: 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: ApplicationFiled: May 22, 2012Publication date: November 29, 2012Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: ROBERT C NAHAS, Andrew P Stamegna
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Publication number: 20120095698Abstract: 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: ApplicationFiled: January 4, 2010Publication date: April 19, 2012Applicant: E.I.DuPont De Nemours and CompanyInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Publication number: 20110315550Abstract: 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: ApplicationFiled: January 4, 2010Publication date: December 29, 2011Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Shi Hua Zhang, Lorenzo Fred Pelosi, Robert C. Nahas
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Publication number: 20040134795Abstract: 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: ApplicationFiled: July 23, 2003Publication date: July 15, 2004Inventors: Daniel R. Demarco, Basil V. Gregorovich, Robert C. Nahas, Shi Hua Zhang
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Patent number: 4713265Abstract: 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: GrantFiled: November 17, 1986Date of Patent: December 15, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventors: Robert C. Nahas, Clifford H. Strolle
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Patent number: 4659799Abstract: 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: GrantFiled: December 3, 1985Date of Patent: April 21, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventors: Robert C. Nahas, Clifford H. Strolle