Patents by Inventor Choung-Houng Lai

Choung-Houng Lai 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: 20210071422
    Abstract: The present disclosure relates generally to roofing elements and methods for making them. In one embodiment, the disclosure provides a roofing element in the form of a roofing shingle that includes a body of a foamed cured cross-linked polymer, the body having a top surface and a bottom surface, the body extending substantially in a plane and having a thickness in the range of 0.5 mm to 35 mm; and a layer of weather-resistant roofing granules disposed on and adhered at the top surface of roofing element. The roofing element can be made by providing a body of wet foamed curable composition, and allowing the curable composition to cure to provide the body of foamed cured cross-linked polymer.
    Type: Application
    Filed: November 16, 2020
    Publication date: March 11, 2021
    Inventors: Choung-Houng Lai, Mithun N. Kamath, Jia Liu, Liyan Ma, Gregory F. Jacobs
  • Patent number: 10857770
    Abstract: A building board including a cementitious layer between two fiber mats. At least one fiber mat forms with a polymer film a fiber mat/polymer film laminate. The cementitious layer of the building board contains a reactive water-insoluble polymer which improves binding of the fiber mat/polymer film laminate to the cementitious layer. The building board has a low water absorption and a high level surface finish.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: December 8, 2020
    Assignee: CERTAINTEED GYPSUM, INC.
    Inventors: Choung-Houng Lai, Gerald Boydston, Bryan Wiltzius, Nathan Frailey, Michael J. Lemberger
  • Patent number: 10837176
    Abstract: The present disclosure relates generally to roofing elements and methods for making them. In one embodiment, the disclosure provides a roofing element in the form of a roofing shingle that includes a body of a foamed cured cross-linked polymer, the body having a top surface and a bottom surface, the body extending substantially in a plane and having a thickness in the range of 0.5 mm to 35 mm; and a layer of weather-resistant roofing granules disposed on and adhered at the top surface of roofing element. The roofing element can be made by providing a body of wet foamed curable composition, and allowing the curable composition to cure to provide the body of foamed cured cross-linked polymer.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: November 17, 2020
    Assignee: CertainTeed LLC
    Inventors: Choung-Houng Lai, Mithun N. Kamath, Jia Liu, Liyan Ma, Gregory F. Jacobs
  • Publication number: 20200208027
    Abstract: An adhesive may include an adhesive structure and an adhesive composition. The adhesive structure may include a graft copolymer. The adhesive composition may include at least about 1 wt. % and not greater than 40 wt. % of a macromonomer component for a total weight of the adhesive composition, at least about 50 wt. % and not greater than about 98 wt. % of a (meth)acrylic based polymeric component A for a total weight of the adhesive composition, and at least about 0.1 wt. % and not greater than about 30 wt. % of a tackifier component for a total weight of the adhesive composition. The macromonomer component may have a weight-average molecular weight of at least 1000 g/mol and a glass transition temperature (Tg) of at least about 40° C. The (meth)acrylic based polymeric component A may have a glass transition temperature (Tg) of not greater than about 20° C.
    Type: Application
    Filed: December 19, 2019
    Publication date: July 2, 2020
    Inventors: Nicky CHAN, Olivia GADY, Choung-Houng LAI, Yubo CUI, James N. GORDON
  • Publication number: 20200208024
    Abstract: An adhesive composition may include at least about 2 wt. % and not greater than 49 wt. % of a (meth)acrylic based polymeric component A for a total weight of the adhesive composition, at least about 51 wt. % of a (meth)acrylic based polymeric component B for a total weight of the adhesive composition; and at least about 0.1 wt. % and not greater than about 30 wt. % of a tackifier component for a total weight of the adhesive composition. The (meth)acrylic based polymeric component A may be acidic and may have a glass transition temperature (Tg) of at least about 40° C. The (meth)acrylic based polymeric component B may be basic and may have a glass transition temperature (Tg) of not greater than about 20° C.
    Type: Application
    Filed: December 19, 2019
    Publication date: July 2, 2020
    Inventors: Nicky CHAN, Kapsoo CHEON, Olivia GADY, Yubo CUI, Choung-Houng LAI, James N. GORDON
  • Publication number: 20190300703
    Abstract: The present disclosure relates generally to polyurethane matrix composite materials, for example, suitable for making an exterior cladding product for houses and other buildings. The present disclosure relates more particularly to a polymer matrix composite material including a polyurethane matrix and an inorganic filler in a range from 45% to 85% by weight of the composite material. The inorganic filler includes a first substance from the group consisting of calcium carbonate, sand, talc, kaolin clay, dolomite, feldspar and mica and any mixture thereof, and fly ash, and/or an iron oxide in a range from 0.5% to 7% by weight of the inorganic filler.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Inventors: Paul Ruede, Choung-Houng Lai, Nicky Chan, George Atkins Walrath, Olivia Gady
  • Publication number: 20190277029
    Abstract: This disclosure relates to using polyester films on building boards to enable improved surface coatings. The polyester film is preferably applied to a glass mat via an adhesive to form a laminate. This laminate is then bonded to the exterior surface of a gypsum board. The polyester film is advantageous because it allows for exterior surface coatings to be applied. In one embodiment, an exterior acrylic coating is applied to the polyester film. Boards constructed in accordance with this disclosure allow for exterior finishings to be achieved without the need for excessive finishing materials or steps.
    Type: Application
    Filed: March 19, 2019
    Publication date: September 12, 2019
    Inventors: Gerald D. Boydston, Bryan J. Wiltzius, Choung-Houng Lai, Michael J. Lemberger
  • Publication number: 20190203470
    Abstract: An example plasterboard includes a layer of hardened plaster material having a first surface and an opposed second surface and a layer of molded material having a surface that faces away from the layer of hardened plaster material. The surface of the layer of molded material has one or more raised features. The plasterboard also includes a liner between the first surface of the layer of hardened plaster material and the layer of molded material. Other examples include a method of forming such plasterboards and a method for installing such plasterboards.
    Type: Application
    Filed: December 23, 2018
    Publication date: July 4, 2019
    Inventors: Mithun N. Kamath, Choung-Houng Lai, Michael J. Lemberger, Gerald Boydston, Bryan Wiltzius, Eric Dong, Nathan Frailey
  • Publication number: 20190203469
    Abstract: An example plasterboard includes a layer of hardened plaster having a first surface and an opposed second surface, a layer of polymer material having particles of one or more cementitiously-active substances mixed therein, and a liner between the first surface of the layer of hardened plaster and the layer of polymer material. Another example is a method of forming such a plasterboard. The method includes loading an extruder with the polymer material having the particles of one or more cementitiously active substances mixed therein, extruding the polymer material through a die to form the layer of polymer material on a surface of the liner, contacting with a layer of wet plaster material, the liner having the polymer material applied thereon such that the surface of the liner faces away from the wet plaster material, and drying the layer of wet plaster material to form the layer of hardened plaster.
    Type: Application
    Filed: December 23, 2018
    Publication date: July 4, 2019
    Inventors: Mithun N. Kamath, Choung-Houng Lai, Michael J. Lemberger, Gerald Boydston, Bryan Witzius, Nathan Frailey, Eric Dong
  • Patent number: 10233641
    Abstract: This disclosure relates to using polyester films on building boards to enable improved surface coatings. The polyester film is preferably applied to a glass mat via an adhesive to form a laminate. This laminate is then bonded to the exterior surface of a gypsum board. The polyester film is advantageous because it allows for exterior surface coatings to be applied. In one embodiment, an exterior acrylic coating is applied to the polyester film. Boards constructed in accordance with this disclosure allow for exterior finishings to be achieved without the need for excessive finishing materials or steps.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: March 19, 2019
    Assignee: Saint-Gobain Placo SAS
    Inventors: Gerald D. Boydston, Bryan J. Wiltzius, Choung-Houng Lai, Michael J. Lemberger
  • Publication number: 20180187419
    Abstract: The present disclosure relates generally to roofing elements and methods for making them. In one embodiment, the disclosure provides a roofing element in the form of a roofing shingle that includes a body of a foamed cured cross-linked polymer, the body having a top surface and a bottom surface, the body extending substantially in a plane and having a thickness in the range of 0.5 mm to 35 mm; and a layer of weather-resistant roofing granules disposed on and adhered at the top surface of roofing element. The roofing element can be made by providing a body of wet foamed curable composition, and allowing the curable composition to cure to provide the body of foamed cured cross-linked polymer.
    Type: Application
    Filed: December 28, 2017
    Publication date: July 5, 2018
    Inventors: Choung-Houng Lai, Mithun N. Kamath, Jia Liu, Liyan Ma, Gregory F. Jacobs
  • Publication number: 20180010338
    Abstract: This disclosure relates to using polyester films on building boards to enable improved surface coatings. The polyester film is preferably applied to a glass mat via an adhesive to form a laminate. This laminate is then bonded to the exterior surface of a gypsum board. The polyester film is advantageous because it allows for exterior surface coatings to be applied. In one embodiment, an exterior acrylic coating is applied to the polyester film. Boards constructed in accordance with this disclosure allow for exterior finishings to be achieved without the need for excessive finishing materials or steps.
    Type: Application
    Filed: September 22, 2017
    Publication date: January 11, 2018
    Inventors: Gerald D. Boydston, Bryan J. Wiltzius, Choung-Houng Lai, Michael J. Lemberger
  • Patent number: 9834929
    Abstract: This disclosure relates to using polyester films on building boards to enable improved surface coatings. The polyester film is preferably applied to a glass mat via an adhesive to form a laminate. This laminate is then bonded to the exterior surface of a gypsum board. The polyester film is advantageous because it allows for exterior surface coatings to be applied. In one embodiment, an exterior acrylic coating is applied to the polyester film. Boards constructed in accordance with this disclosure allow for exterior finishings to be achieved without the need for excessive finishing materials or steps.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: December 5, 2017
    Assignee: Saint-Gobain Placo SAS
    Inventors: Gerald D. Boydston, Bryan J. Wiltzius, Choung-Houng Lai, Michael J. Lemberger
  • Publication number: 20170284093
    Abstract: A building board including a cementitious layer between two fiber mats. At least one fiber mat forms with a polymer film a fiber mat/polymer film laminate. The cementitious layer of the building board contains a reactive water-insoluble polymer which improves binding of the fiber mat/polymer film laminate to the cementitious layer. The building board has a low water absorption and a high level surface finish.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Inventors: Choung-Houng LAI, Gerald BOYDSTON, Bryan WILTZIUS, Nathan FRAILEY, Michael J. LEMBERGER
  • Patent number: 9656876
    Abstract: Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: May 23, 2017
    Assignee: CertainTeed Gypsum, Inc.
    Inventors: John W. College, Sang-Ho Lee, Chris Hilton, Yu-Zhi Kiang, Choung-Houng Lai, George Glavin
  • Publication number: 20170121183
    Abstract: Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 4, 2017
    Inventors: John W. College, Sang-Ho Lee, Chris Hilton, Yu-Zhi Kiang, Choung-Houng Lai, George Glavin, Helen Ilyashenko
  • Publication number: 20160347936
    Abstract: A glass mat is provided. The glass mat includes an assembly of glass fibers; and a binder composition including a polymer resin and a crosslinker. The polymer resin has a pH of at least about 5.0. The polymer resin includes a styrenic copolymer, an acrylic copolymer, or combination thereof having at least one functional group of a carboxylic acid, a salt of a carboxylic acid, an anhydride, a salt of an anhydride, or combination thereof. The crosslinker includes a polyol, a polyepoxy, a polycarbodiimide, a polyaziridine, a bivalent metal carbonate, or combination thereof. Further provided is a method of making the glass mat.
    Type: Application
    Filed: May 26, 2016
    Publication date: December 1, 2016
    Inventors: Camila A. GARCES, Tao YU, Choung-Houng LAI
  • Patent number: 5654365
    Abstract: Syndiotactic polystyrene can be impact-modified by a blend of (a) polystyrene-hydrogenated polybutadiene block copolymers and (b) one or more core/shell modifiers based on a lightly or non-crosslinked rubber core, and with at least one shell or intermediate shell stage which is predominantly polystyrene, to produce a material of higher impact strength than the better value of either additive singly at the same total impact modifier level.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: August 5, 1997
    Assignee: Rohm and Haas Company
    Inventors: Stephen Havriliak, Jr., Nazir Ahmed Memon, Choung-Houng Lai
  • Patent number: 5409967
    Abstract: Impact modifiers which produce transparent, high notched Izod impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with cores comprised mainly of rubbery polymers of diolefins and vinyl aromatic monomers and shells comprised mainly of styrene copolymers (e.g. styrene and hydroxyalkyl (meth)acrylate).
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: April 25, 1995
    Assignee: Rohm and Haas Company
    Inventors: William G. Carson, Choung-Houng Lai, Edward J. Troy
  • Patent number: 5322663
    Abstract: A rapidly-crystallizing modified poly(ethylene terephthalate) contains an acrylic core/shell impact modifier, a small amount of a polycarbonate, and a small amount of a copolymer of ethylene with a vinyl or vinylidene monomer containing ester groups. Improved mold release and lessened plate-out are observed over other additive combinations.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: June 21, 1994
    Assignee: Rohm and Haas Company
    Inventors: Choung-Houng Lai, Jean M. Brady