Patents by Inventor John B. Letts

John B. Letts 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: 20190194947
    Abstract: A covered roof includes a roof deck, an insulation board, and a coverboard. The insulation board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density that is less than 2.5 pounds per cubic foot, and has a first planar surface and a second planar surface, each having a facer positioned adjacent thereto. The coverboard includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot, an iso index of at least 175, and a first planar surface and a second planar surface, each having a facer positioned adjacent thereto.
    Type: Application
    Filed: September 25, 2018
    Publication date: June 27, 2019
    Inventors: Gregory A. BRANDT, John B. LETTS
  • Publication number: 20190186124
    Abstract: A composite insulation board comprising of a vacuum-insulated capsule; a foam body that encases said capsule, said foam body having first and second opposed planar surfaces; and a layer of pressure-sensitive adhesive disposed, either directly or indirectly, on one of said first and second opposed planar surfaces.
    Type: Application
    Filed: May 15, 2017
    Publication date: June 20, 2019
    Inventors: Michael J. Hubbard, John B. Letts, Chunhua Yao
  • Publication number: 20180320370
    Abstract: A construction board comprising a foam body having first and second planar surfaces, said foam body including a polyisocyanurate foam matrix defining a plurality of closed cells, said closed cells being at least substantially devoid of hydrocarbon blowing agents, and said foam body being characterized by a density, pursuant to ASTM C303, of at least 2.5 lbs/ft3; and a facer disposed on a planar surface of said foam body, said facer including a glass substrate having an internal planar surface proximate to said foam body and an external planar surface opposite said foam body, a first coating disposed on said external surface, and a second coating disposed on or proximate to said internal surface, where said first coating disposed on said external surface includes an inert filler, and where said second coating disposed on or proximate to said internal surface includes intumescent material.
    Type: Application
    Filed: May 7, 2018
    Publication date: November 8, 2018
    Inventors: John B. LETTS, Chunhua YAO, Michael J. HUBBARD
  • Publication number: 20180087277
    Abstract: A covered roof includes a roof deck, an insulation board, and a coverboard. The insulation board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density that is less than 2.5 pounds per cubic foot, and has a first planar surface and a second planar surface, each having a facer positioned adjacent thereto. The coverboard includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot, an iso index of at least 175, and a first planar surface and a second planar surface, each having a facer positioned adjacent thereto.
    Type: Application
    Filed: December 4, 2017
    Publication date: March 29, 2018
    Inventors: Gregory A. BRANDT, John B. LETTS
  • Patent number: 9856651
    Abstract: A roofing system includes a construction board positioned over a roof deck and a plurality of fastening plates positioned on a top surface of the construction board. At least one connector extends between two of the plurality of fastening plates and is positioned on the top surface of the construction board. The construction boards may be insulation or cover boards, and in certain embodiments may be polyisocyanurate boards. Fasteners are driven through the fastening plates and the construction boards and into an underlying roof deck to secure the construction boards in place.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: January 2, 2018
    Assignee: Firestone Building Products Co., LLC
    Inventors: John B. Letts, Timothy Tackett, Allen Sopko, Michael Hubbard, John Geary
  • Publication number: 20170328062
    Abstract: A construction board comprising of a foam body, said foam body having first and second planar sides; and a facer affixed to said first or second planar surface, said facer including a cellulosic substrate and a water-resistant coating layer, said cellulosic layer having first and second planar sides, where said first planar side of said cellulosic substrate is affixed to said foam body and said second planar side carries said coating, where said cellulosic substrate is substantially devoid of fiberglass, where said water-resistant coating layer has a thickness of less than 1.5 mm, and where said water-resistant coating layer includes a polymeric binder and a filler dispersed throughout the binder.
    Type: Application
    Filed: August 3, 2017
    Publication date: November 16, 2017
    Applicant: FIRESTONE BUILDING PRODUCTS CO., LLC
    Inventors: John B. LETTS, Michael VALL, Timothy L. BERGWALL
  • Publication number: 20170015027
    Abstract: Embodiments of the present invention are based, at least in part, on the discovery of methods for encapsulating fragile insulation materials within polyisocyanurate foam to thereby provide a construction board having an advantageous balance of insulating properties and mechanical durability.
    Type: Application
    Filed: March 31, 2015
    Publication date: January 19, 2017
    Applicant: FIRESTONE BUILDING PRODUCTS CO., LLC
    Inventors: John B. LETTS, Michael J. HUBBARD
  • Publication number: 20160369510
    Abstract: A covered roof includes a roof deck, an insulation board, and a coverboard. The insulation board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density that is less than 2.5 pounds per cubic foot, and has a first planar surface and a second planar surface, each having a facer positioned adjacent thereto. The coverboard includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot, an iso index of at least 175, and a first planar surface and a second planar surface, each having a facer positioned adjacent thereto.
    Type: Application
    Filed: September 1, 2016
    Publication date: December 22, 2016
    Applicant: FIRESTONE BUILDING PRODUCTS CO., LLC
    Inventors: Gregory A. Brandt, John B. Letts
  • Publication number: 20160168853
    Abstract: A construction board comprising of a foam body, said foam body having first and second planar sides; and a facer affixed to said first or second planar surface, said facer including a cellulosic substrate and a water-resistant coating layer, said cellulosic layer having first and second planar sides, where said first planar side of said cellulosic substrate is affixed to said foam body and said second planar side carries said coating, where said cellulosic substrate is substantially devoid of fiberglass, where said water-resistant coating layer has a thickness of less than 1.5 mm, and where said water-resistant coating layer includes a polymeric binder and a filler dispersed throughout the binder.
    Type: Application
    Filed: December 11, 2015
    Publication date: June 16, 2016
    Inventors: John B. Letts, Michael Vall, Timothy L. Bergwall
  • Publication number: 20130164524
    Abstract: A construction board comprising a foam layer and at least one coated facer, where the at least one coated facer includes a substrate and a coating.
    Type: Application
    Filed: April 14, 2011
    Publication date: June 27, 2013
    Inventors: John B. Letts, Michael Vall, Timothy L. Bergwall
  • Publication number: 20120311951
    Abstract: A roofing system includes a construction board positioned over a roof deck and a plurality of fastening plates positioned on a top surface of the construction board. At least one connector extends between two of the plurality of fastening plates and is positioned on the top surface of the construction board. The construction boards may be insulation or cover boards, and in certain embodiments may be polyisocyanurate boards. Fasteners are driven through the fastening plates and the construction boards and into an underlying roof deck to secure the construction boards in place.
    Type: Application
    Filed: May 29, 2012
    Publication date: December 13, 2012
    Inventors: John B. LETTS, Timothy Tackett, Allen Sopko, Michael Hubbard, John Geary
  • Publication number: 20120167510
    Abstract: A high density construction board includes a cellular body having a first planar surface and a second planar surface. A first glass facer is positioned adjacent the first planar surface and a second glass facer is positioned adjacent the second planar surface. The cellular body of the construction board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate and has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot.
    Type: Application
    Filed: March 12, 2012
    Publication date: July 5, 2012
    Inventors: Gregory A. Brandt, John B. Letts
  • Publication number: 20120167509
    Abstract: A covered roof includes a roof deck, an insulation board, and a coverboard. The insulation board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density that is less than 2.5 pounds per cubic foot, and has a first planar surface and a second planar surface, each having a facer positioned adjacent thereto. The coverboard includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot, an iso index of at least 175, and a first planar surface and a second planar surface, each having a facer positioned adjacent thereto.
    Type: Application
    Filed: March 7, 2012
    Publication date: July 5, 2012
    Inventors: Gregory A. BRANDT, John B. Letts
  • Patent number: 8153039
    Abstract: A method for producing foam insulation board, the method comprising forming a foam product as part of a continuous process, where said foam product includes at least one side edge, monitoring on-line the compressive strength of the foam product, along said at least one side edge, and adjusting said step of forming a foam product in view of data obtained from said step of monitoring.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: April 10, 2012
    Assignee: Firestone Building Products Co., LLC
    Inventors: Timothy Tackett, John B. Letts
  • Patent number: 8142903
    Abstract: A construction board (10) comprising a cellular body and at least one facer (22,23), where the at least one cellulosic facer (22,23) is characterized by a burst strength of at least 250 kPa pursuant to T403 om-02 (TAPPI).
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: March 27, 2012
    Assignee: Firestone Building Products Co., LLC
    Inventors: John B. Letts, Robert C. Harrison
  • Patent number: 8106106
    Abstract: A method for producing polyisocyanurate insulation foams, the method comprising contacting an A-side stream of reactants that includes an isocyanate with a B-side stream of reactants that include a polyol and a blowing agent, where the blowing agent includes isopentane and n-pentane in a substantial absence of cyclopentane.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: January 31, 2012
    Assignee: Firestone Building Products Company, LLC
    Inventor: John B. Letts
  • Publication number: 20110214387
    Abstract: A covered roof includes a roof deck, an insulation board, and a coverboard. The insulation board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density that is less than 2.5 pounds per cubic foot, and has a first planar surface and a second planar surface, each having a facer positioned adjacent thereto. The coverboard includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate cellular structure, has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot, an iso index of at least 175, and a first planar surface and a second planar surface, each having a facer positioned adjacent thereto.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 8, 2011
    Inventors: Gregory A. Brandt, John B. LETTS
  • Publication number: 20110214373
    Abstract: A high density construction board includes a cellular body having a first planar surface and a second planar surface. A first glass facer is positioned adjacent the first planar surface and a second glass facer is positioned adjacent the second planar surface. The cellular body of the construction board includes a polyurethane, a polyisocyanurate, or a mix of polyurethane and polyisocyanurate and has a density greater than about 2.5 pounds per cubic foot and less than 6 pounds per cubic foot.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 8, 2011
    Inventors: Gregory A. Brandt, John B. LETTS
  • Patent number: 7987730
    Abstract: An edge-strength measuring device for measuring the compressive strength of a foam matrix along the edges thereof, the device comprising at least one measuring implement having one or more contacting elements for engaging with the edges of the foam matrix, and at least one measuring device in communication with said contacting elements for measuring the resistance imparted by the foam matrix when said contacting element is engaged with the edge.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: August 2, 2011
    Inventors: Timothy Tackett, John B. Letts
  • Patent number: 7972688
    Abstract: A covered low-slope or flat roof comprising (a) a roof deck, (b) an optional insulation board including a polyurethane or polyisocyanurate cellular structure having a density that is less than 2.5 pounds per cubic foot, (c) a coverboard including a polyurethane or polyisocyanurate cellular structure having a density greater than about 2.5 pounds per cubic foot, and (d) a membrane.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: July 5, 2011
    Inventors: John B. Letts, Gregory A. Brandt