Patents by Inventor David J. Lavanga

David J. Lavanga 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).

  • Insulated conduit including a fluoropolymer composition for use as a thermal insulation layer
    Patent number: 11034124
    Abstract: An insulated conduit for use in offshore, deep water environments includes a pipe and a fluoropolymer composition. The pipe has an outer surface with the fluoropolymer composition disposed about the outer surface of the pipe for providing a thermal insulation layer. The fluoropolymer composition includes a fluoroplastic polymer present in an amount of at least 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition also includes a fluoroelastomer present in an amount of a fluoroelastomer present in an amount of from about 20 to about 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition has a thermal conductivity less than about 0.20 W/mK at 205° C.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: June 15, 2021
    Assignees: AGC CHEMICALS AMERICAS, INC., AGC INC.
    Inventors: Masahide Yodogawa, David J. Lavanga, Dennis G Murphy, Ken Iruya
  • Insulated Conduit Including A Fluoropolymer Composition For Use As A Thermal Insulation Layer
    Publication number: 20180312679
    Abstract: An insulated conduit for use in offshore, deep water environments includes a pipe and a fluoropolymer composition. The pipe has an outer surface with the fluoropolymer composition disposed about the outer surface of the pipe for providing a thermal insulation layer. The fluoropolymer composition includes a fluoroplastic polymer present in an amount of at least 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition also includes a fluoroelastomer present in an amount of a fluoroelastomer present in an amount of from about 20 to about 50 parts by weight based on 100 parts by weight of the fluoropolymer composition. The fluoropolymer composition has a thermal conductivity less than about 0.20 W/mK at 205° C.
    Type: Application
    Filed: November 2, 2016
    Publication date: November 1, 2018
    Inventors: Masahide Yodogawa, David J. Lavanga, Dennis G. Murphy, Ken Iruya
  • Polyetrafluoroethylene micropowder compositions
    Patent number: 7579409
    Abstract: A micropowder composition containing a granular PTFE micropowder, a fine powder PTFE micropowder, and a fine powder molding resin provides mixtures with fluoroelastomers containing copolymerized and alternating units of tetrafluoroethylene and propylene that provide molded articles having improved surface smoothness characteristics and tear resistance on molding. Processes for mixing additives with fluoroelastomers by adding or mixing the fluoroelastomer with the additives in the presence of micropowder PTFE compositions.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: August 25, 2009
    Assignee: AGC Chemicals Americas, Inc.
    Inventors: David J. Lavanga, Richard DeLucca
  • Radiation-shielding polymeric compositions
    Patent number: 5556898
    Abstract: Radiation resistant, gadolinium oxide modified, thermoplastic polymers which may be used for containing nuclear waste.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: September 17, 1996
    Assignee: ELF Atochem North America, Inc.
    Inventors: Leo T. Hutton, David J. Lavanga