Patents by Inventor Jeff Sewell

Jeff Sewell 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).

  • Method of uniaxially expanding a fluoropolymer product
    Patent number: 8298462
    Abstract: This invention relates to a method of uniaxially expanding a fluoropolymer product including the steps of expanding a green fluoropolymer product in a first direction to create a first-expanded fluoropolymer product, and expanding the first-expanded fluoropolymer product in the same first direction. As a result with the subject invention, it has been found that ultra-high expansion and a variety of different porous/fibril structures can be achieved by using subsequent expansion steps in the same direction. Various considerations exist with such methodology, including the selection of rates of expansion of both steps, the amount of expansion of both steps, pre-heating and cutting the product between expansion steps. Although the present invention can be used with various fluoropolymer products, it is particularly well-suited for use with PTFE.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: October 30, 2012
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Michael Luk, Jeff Sewell, Jason Hill
  • Method of uniaxially expanding a fluoropolymer product
    Publication number: 20060145394
    Abstract: This invention relates to a method of uniaxially expanding a fluoropolymer product including the steps of expanding a green fluoropolymer product in a first direction to create a first-expanded fluoropolymer product, and expanding the first-expanded fluoropolymer product in the same first direction. As a result with the subject invention, it has been found that ultra-high expansion and a variety of different porous/fibril structures can be achieved by using subsequent expansion steps in the same direction. Various considerations exist with such methodology, including the selection of rates of expansion of both steps, the amount of expansion of both steps, pre-heating and cutting the product between expansion steps. Although the present invention can be used with various fluoropolymer products, it is particularly well-suited for use with PTFE.
    Type: Application
    Filed: December 30, 2004
    Publication date: July 6, 2006
    Inventors: Michael Luk, Jeff Sewell, Jason Hill