Patents by Inventor Dong-Chul Pyun

Dong-Chul Pyun 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: 20210389504
    Abstract: The present invention provides certain CHIP films and coatings, as well as the preparation and uses thereof. Chalcogenide hybrid organic/inorganic polymers or CHIPs may be suitable for use in antireflection coatings for use with infrared optics, for example as applied to lenses for infrared cameras. The coatings may be applied with spin coating and have a thickness related to the quarter wavelength of the desired infrared wavelengths.
    Type: Application
    Filed: October 1, 2019
    Publication date: December 16, 2021
    Inventors: Dong-Chul Pyun, Robert A. Norwood, Abhinav Nishant, Laura Anderson, Tristan Kleine
  • Publication number: 20210238352
    Abstract: Sulfur copolymers and methods of synthesizing said sulfur copolymers are described herein. Sulfur monomers copolymerize with epoxide or vinylic moieties the epoxy-functionalized styrenic comonomers to form a crosslinked network of the sulfur copolymer. Sulfur copolymers having high sulfur content are used as raw materials in 3D printing. Chalcogenide-based copolymers can utilize selenium to provide for the optical properties. Using an inverse vulcanization method, chalcogenic sulfur copolymers are used to prepare chemically stable polymer plastic materials with tunable optical and thermochemical properties. Optical substrates, such as films, waveguides, and molded (nano-, micro-) objects and lenses, are constructed from sulfur copolymers via 3D printing and are substantially transparent in the visible and infrared spectrum.
    Type: Application
    Filed: January 22, 2021
    Publication date: August 5, 2021
    Inventor: Dong-Chul Pyun
  • Patent number: 11078333
    Abstract: Copolymerization of elemental sulfur with functional comonomers afford sulfur copolymers having a high molecular weight and high sulfur content. Nucleophilic activators initiate sulfur polymerizations at relative lower temperatures and in solutions, which enable the use of a wider range of comonomers, such as vinylics, styrenics, and non-homopolymerizing comonomers. Nucleophilic activators promote ring-opening reactions to generate linear polysulfide intermediates that copolymerize with comonomers. Dynamic sulfur-sulfur bonds enable re-processing or melt processing of the sulfur polymer. Chalcogenide-based copolymers have a refractive index of about 1.7-2.6 at a wavelength in a range of about 5000 nm-8????. The sulfur copolymer can be a thermoplastic or a thermoset for use in elastomers, resins, lubricants, coatings, antioxidants, cathode materials for electrochemical cells, dental adhesives/restorations, and polymeric articles such as polymeric films and free-standing substrates.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: August 3, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dong-Chul Pyun, Richard S. Glass, Robert A. Norwood, Jared J. Griebel, Soha Namnabat
  • Patent number: 11015023
    Abstract: Compositions of flame retardants and methods of enhancing char formation in a flame retardant-treated substrate. A base material is combined with a flame retardant to form the flame retardant-treated substrate. The flame retardant contains a sulfur copolymer prepared by the polymerization of sulfur monomers with organic monomers. The flame retardant can be deposited on a surface of the base material, coated on the base material, or mixed into the base material. When the flame resistant substrate is on fire, the flame retardant forms a charring layer on the flame retardant-treated substrate. The charring layer can extinguish and prevent the fire from spreading.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: May 25, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Dong-Chul Pyun
  • Publication number: 20210102012
    Abstract: The present invention provides certain polymeric materials, precursors thereof as well as the preparation and uses thereof.
    Type: Application
    Filed: March 29, 2018
    Publication date: April 8, 2021
    Inventors: Dong-Chul Pyun, Robert A. Norwood, Roland Himmelhuber, Tristan Stephen Kleine, Liliana Ruiz Diaz, Laura E. Anderson
  • Publication number: 20210047472
    Abstract: An iterative approach to dynamic covalent polymerizations of elemental sulfur with functional comonomers to prepare sulfur prepolymers that can further reacted with other conventional, commercially available comonomers to prepare a wider class of functional sulfur polymers. This iterative method improves handling, miscibility and solubility of the elemental sulfur, and further enables tuning of the sulfur polymer composition. The sulfur polymers may be a thermoplastic or a thermoset for use in elastomers, resins, lubricants, coatings, antioxidants, cathode materials for electrochemical cells, and polymeric articles such as polymeric films and free-standing substrates.
    Type: Application
    Filed: July 13, 2017
    Publication date: February 18, 2021
    Inventors: Dong-Chul Pyun, Yueyan Zhang
  • Patent number: 10920020
    Abstract: Sulfur copolymers having high sulfur content for use as raw materials in 3D printing. The sulfur copolymers are prepared by melting and copolymerizing one or more comonomers with cyclic selenium sulfide, elemental sulfur, elemental selenium, or a combination thereof. Optical substrates, such as films and lenses, are constructed from the sulfur copolymer via 3D printing and are substantially transparent in the visible and infrared spectrum. The optical substrates can have refractive indices of about 1.75-2.6 at a wavelength in a range of about 500 nm to about 8 ?m.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: February 16, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dong-Chul Pyun, Rongguang Liang
  • Patent number: 10894863
    Abstract: Compositions and methods of producing composite materials for use as a cathode in electrochemical cells. Elemental sulfur is mixed with tungsten sulfide (WS2) to form a composite mixture. Organic comonomers may be added to the composite mixture. The composite mixture is reacted to form the composite material. Electrochemical cells with cathodes containing the composite material demonstrated improved battery performance.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: January 19, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dong-Chul Pyun, Nicholas George Pavlopoulos
  • Patent number: 10833330
    Abstract: Sulfur composites and polymeric materials having a high sulfur content and prepared from elemental sulfur as the primary chemical feedstock. The sulfur copolymers are prepared by the polymerization of elemental sulfur with one or more monomers of amines, thiols, sulfides, alkynylly unsaturated monomers, nitrones, aldehydes, ketones, thiiranes, ethylenically unsaturated monomers, or epoxides. The sulfur copolymers may be further dispersed with metal or ceramic composites or copolymerized with elemental carbon, photoactive organic chromophores, or reactive and solubilising/biocompatible moieties. The sulfur composites and polymeric materials feature the ability self-healing through thermal reformation. Applications utilizing the sulfur composites and polymeric materials may include electrochemical cells, optics, H2S donors and antimicrobial materials.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: November 10, 2020
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventor: Dong-Chul Pyun
  • Publication number: 20200299848
    Abstract: Catalyst systems employing inexpensive and readily-available protic co-catalysts to increase a proton reduction rate in a hydrogen evolution reaction (HER) are described herein. The protic co-catalysts function to increase the rate without being consumed in the process of water splitting to hydrogen and oxygen. They may simultaneously serve to stabilize the pH of the water and be the electrolyte to carry the current for the electrolytic splitting of water. The protic co-catalysts also decrease the overpotential energy requirement for the process of water splitting. These protic co-catalysts can be used with both heterogeneous and homogenous catalysts, as well as assist photocatalysis and other processes for the reduction of protons.
    Type: Application
    Filed: December 11, 2018
    Publication date: September 24, 2020
    Inventors: Dennis Lichtenberger, Richard S. Glass, Dong-Chul Pyun, William Brezinski, Kayla Clary, Metin Karayilan
  • Publication number: 20200207933
    Abstract: Methods of vulcanization using a high content sulfur polymer, instead of elemental sulfur, have been developed. These high sulfur content polymers are referred to as Chalcogenide Hybrid Inorganic/Organic Polymers (CHIP) materials and have good polymer compatibility in that they are soluble in a number of polymers. Furthermore, CHIP materials may have weaker bonds than the S—S bonds of elemental sulfur and thus provide for a higher crosslinking efficiency vulcanization.
    Type: Application
    Filed: June 14, 2018
    Publication date: July 2, 2020
    Inventors: Dong-Chul Pyun, Richard S. Glass, Kyle Carothers, Yueyan Zhang
  • Publication number: 20190345618
    Abstract: Metallopolymers composed of polymers and catalytically active diiron-disulfide ([2Fe-2S]) complexes are described herein. [FeFe]-hydrogenase mimics have been synthesized and used to initiate polymerization of various monomers to generate metallopolymers containing active [2Fe-2S] sites which serve as catalysts for a hydrogen evolution reaction (HER). Vinylic monomers with polar groups provided water solubility relevant for large scale hydrogen production, leveraging the supramolecular architecture to improve catalysis. Metallopolymeric electrocatalysts displayed high turnover frequency and low overpotential in aqueous media as well as aerobic stability. Metallopolymeric photocatalysts incorporated P3HT ligands to serve as a photosensitizer to promote photoinduced electron transfer to the active complex.
    Type: Application
    Filed: December 11, 2017
    Publication date: November 14, 2019
    Inventors: Dong-Chul Pyun, Richard S. Glass, Dennis Lichtenberger, William Brezinski, Kayla Clary, Metin Karayilan
  • Publication number: 20190338076
    Abstract: Compositions of flame retardants and methods of enhancing char formation in a flame retardant-treated substrate. A base material is combined with a flame retardant to form the flame retardant-treated substrate. The flame retardant contains a sulfur copolymer prepared by the polymerization of sulfur monomers with organic monomers. The flame retardant can be deposited on a surface of the base material, coated on the base material, or mixed into the base material. When the flame resistant substrate is on fire, the flame retardant forms a charring layer on the flame retardant-treated substrate. The charring layer can extinguish and prevent the fire from spreading.
    Type: Application
    Filed: July 16, 2019
    Publication date: November 7, 2019
    Inventor: Dong-Chul Pyun
  • Publication number: 20180208686
    Abstract: Copolymerization of elemental sulfur with functional comonomers afford sulfur copolymers having a high molecular weight and high sulfur content. Nucleophilic activators initiate sulfur polymerizations at relative lower temperatures and in solutions, which enable the use of a wider range of comonomers, such as vinylics, styrenics, and non-homopolymerizing comonomers. Nucleophilic activators promote ring-opening reactions to generate linear polysulfide intermediates that copolymerize with comonomers. Dynamic sulfur-sulfur bonds enable re-processing or melt processing of the sulfur polymer. Chalcogenide-based copolymers have a refractive index of about 1.7-2.6 at a wavelength in a range of about 5000 nm-8????. The sulfur copolymer can be a thermoplastic or a thermoset for use in elastomers, resins, lubricants, coatings, antioxidants, cathode materials for electrochemical cells, dental adhesives/restorations, and polymeric articles such as polymeric films and free-standing substrates.
    Type: Application
    Filed: July 13, 2016
    Publication date: July 26, 2018
    Inventors: Dong-Chul Pyun, Richard S. Glass, Robert A. Norwood, Jared J. Griebel, Soha Namnabat
  • Patent number: 10016486
    Abstract: Methods and compositions using a combination of adenosine monophosphate protein kinase (AMPK) activators for treating pain such as post-surgical pain or development of chronic pain. The two or more AMPK activators work synergistically and may be administered in individually sub-efficacious doses. The AMPK activators may have different mechanisms of AMPK activation. The AMPK activators may be administered systemically and/or topically in, for example, as a gel, ointment, cream, lotion, suspension, liquid, or transdermal patch.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: July 10, 2018
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dong-Chul Pyun, Theodore J. Price, Gregory D. Dussor, Dipti Tillu, Bo Lian
  • Publication number: 20180186967
    Abstract: Compositions of flame retardants and methods of enhancing char formation in a flame retardant-treated substrate. A base material is combined with a flame retardant to form the flame retardant-treated substrate. The flame retardant contains a sulfur copolymer prepared by the polymerization of sulfur monomers with organic monomers. The flame retardant can be deposited on a surface of the base material, coated on the base material, or mixed into the base material. When the flame resistant substrate is on fire, the flame retardant forms a charring layer on the flame retardant-treated substrate. The charring layer can extinguish and prevent the fire from spreading.
    Type: Application
    Filed: June 29, 2016
    Publication date: July 5, 2018
    Inventor: Dong-Chul Pyun
  • Publication number: 20180105649
    Abstract: Sulfur copolymers having high sulfur content for use as raw materials in 3D printing. The sulfur copolymers are prepared by melting and copolymerizing one or more comonomers with cyclic selenium sulfide, elemental sulfur, elemental selenium, or a combination thereof. Optical substrates, such as films and lenses, are constructed from the sulfur copolymer via 3D printing and are substantially transparent in the visible and infrared spectrum. The optical substrates can have refractive indices of about 1.75-2.6 at a wavelength in a range of about 500 nm to about 8 ?m.
    Type: Application
    Filed: December 28, 2017
    Publication date: April 19, 2018
    Inventors: Dong-Chul Pyun, Rongguang Liang
  • Publication number: 20180100037
    Abstract: Sulfur copolymers and methods of synthesizing said sulfur copolymers are described herein. Elemental sulfur is melted to form liquid sulfur monomers having reactive sulfur groups. Epoxy-functionalized styrenic comonomers having an epoxide moiety and a vinylic moiety are added to the liquid sulfur monomers. The reactive sulfur groups of the liquid sulfur monomers copolymerize with the epoxide or vinylic moiety of the epoxy-functionalized styrenic comonomers to form a crosslinked network of the sulfur copolymer.
    Type: Application
    Filed: December 12, 2017
    Publication date: April 12, 2018
    Inventor: Dong-Chul Pyun
  • Publication number: 20180079865
    Abstract: Compositions and methods of producing composite materials for use as a cathode in electrochemical cells. Elemental sulfur is mixed with tungsten sulfide (WS2) to form a composite mixture. Organic comonomers may be added to the composite mixture. The composite mixture is reacted to form the composite material. Electrochemical cells with cathodes containing the composite material demonstrated improved battery performance.
    Type: Application
    Filed: December 1, 2017
    Publication date: March 22, 2018
    Inventors: Dong-Chul Pyun, Nicholas George Pavlopoulos
  • Patent number: 9567439
    Abstract: Sulfur composites and polymeric materials having a high sulfur content and prepared from elemental sulfur as the primary chemical feedstock. The sulfur copolymers are prepared by the polymerization of elemental sulfur with one or more monomers of amines, thiols, sulfides, alkynylly unsaturated monomers, nitrones, aldehydes, ketones, thiiranes, ethylenically unsaturated monomers, or epoxides. The sulfur copolymers may be further dispersed with metal or ceramic composites or copolymerized with elemental carbon, photoactive organic chromophores, or reactive and solubilizing/biocompatible moieties. The sulfur composites and polymeric materials feature the ability self-healing through thermal reformation. Applications utilizing the sulfur composites and polymeric materials may include electrochemical cells, optics, H2S donors and antimicrobial materials.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: February 14, 2017
    Assignee: THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dong-Chul Pyun, Richard S. Glass, M. Bonner Denton