Patents by Inventor Stephan Letts

Stephan 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).

  • Patent number: 8211499
    Abstract: A system of fabricating a composite membrane from a membrane substrate using solvent-less vapor deposition followed by in-situ polymerization. A first monomer and a second monomer are directed into a mixing chamber in a deposition chamber. The first monomer and the second monomer are mixed in the mixing chamber providing a mixed first monomer and second monomer. The mixed first monomer and second monomer are solvent-less vapor deposited onto the membrane substrate in the deposition chamber. The membrane substrate and the mixed first monomer and second monomer are heated to produce in-situ polymerization and provide the composite membrane.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: July 3, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Kevin C. O'Brien, Stephan A. Letts, Christopher M. Spadaccini, Jeffrey D. Morse, Steven R. Buckley, Larry E. Fischer, Keith B. Wilson
  • Patent number: 8101023
    Abstract: A system of fabricating a composite membrane from a membrane substrate using solvent-less vapor deposition followed by in-situ polymerization. A first monomer and a second monomer are directed into a mixing chamber in a deposition chamber. The first monomer and the second monomer are mixed in the mixing chamber providing a mixed first monomer and second monomer. The mixed first monomer and second monomer are solvent-less vapor deposited onto the membrane substrate in the deposition chamber. The membrane substrate and the mixed first monomer and second monomer are heated to produce in-situ polymerization and provide the composite membrane.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: January 24, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Kevin C. O'Brien, Stephan A. Letts, Christopher M. Spadaccini, Jeffrey C. Morse, Steven R. Buckley, Larry E. Fischer, Keith B. Wilson
  • Patent number: 7894496
    Abstract: A novel method and apparatus for suppressing ASE and/or parasitic oscillation modes in a laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges to a predetermined electromagnetic absorbing material arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE, parasitic oscillation modes and/or residual pump energy can be effectively suppressed.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: February 22, 2011
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Lloyd A. Hackel, Thomas F. Soules, Scott N. Fochs, Mark D. Rotter, Stephan A. Letts
  • Publication number: 20100236481
    Abstract: A system of fabricating a composite membrane from a membrane substrate using solvent-less vapor deposition followed by in-situ polymerization. A first monomer and a second monomer are directed into a mixing chamber in a deposition chamber. The first monomer and the second monomer are mixed in the mixing chamber providing a mixed first monomer and second monomer. The mixed first monomer and second monomer are solvent-less vapor deposited onto the membrane substrate in the deposition chamber. The membrane substrate and the mixed first monomer and second monomer are heated to produce in-situ polymerization and provide the composite membrane.
    Type: Application
    Filed: June 2, 2010
    Publication date: September 23, 2010
    Inventors: Kevin C. O'Brien, Stephan A. Letts, Christopher M. Spadaccini, Jeffrey C. Morse, Steven R. Buckley, Larry E. Fischer, Keith B. Wilson
  • Patent number: 7754281
    Abstract: A system of fabricating a composite membrane from a membrane substrate using solvent-less vapor deposition followed by in-situ polymerization. A first monomer and a second monomer are directed into a mixing chamber in a deposition chamber. The first monomer and the second monomer are mixed in the mixing chamber providing a mixed first monomer and second monomer. The mixed first monomer and second monomer are solvent-less vapor deposited onto the membrane substrate in the deposition chamber. The membrane substrate and the mixed first monomer and second monomer are heated to produce in-situ polymerization and provide the composite membrane.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: July 13, 2010
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Kevin C. O'Brien, Stephan A. Letts, Christopher M. Spadaccini, Jeffrey C. Morse, Steven R. Buckley, Larry E. Fischer, Keith B. Wilson
  • Publication number: 20090059977
    Abstract: A novel method and apparatus for suppressing ASE and/or parasitic oscillation modes in a laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges to a predetermined electromagnetic absorbing material arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE, parasitic oscillation modes and/or residual pump energy can be effectively suppressed.
    Type: Application
    Filed: November 5, 2008
    Publication date: March 5, 2009
    Inventors: Lloyd A. Hackel, Thomas F. Soules, Scott N. Fochs, Mark D. Rotter, Stephan A. Letts
  • Patent number: 7463660
    Abstract: A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges using a substantially high index bonding elastomer or epoxy to a predetermined electromagnetic absorbing arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE and parasitic oscillation modes can be effectively suppressed.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: December 9, 2008
    Assignee: Lawrence Livermore National Laboratory, LLC
    Inventors: Lloyd A. Hackel, Thomas F. Soules, Scott N. Fochs, Mark D. Rotter, Stephan A. Letts
  • Publication number: 20070098896
    Abstract: A system of fabricating a composite membrane from a membrane substrate using solvent-less vapor deposition followed by in-situ polymerization. A first monomer and a second monomer are directed into a mixing chamber in a deposition chamber. The first monomer and the second monomer are mixed in the mixing chamber providing a mixed first monomer and second monomer. The mixed first monomer and second monomer are solvent-less vapor deposited onto the membrane substrate in the deposition chamber. The membrane substrate and the mixed first monomer and second monomer are heated to produce in-situ polymerization and provide the composite membrane.
    Type: Application
    Filed: December 4, 2006
    Publication date: May 3, 2007
    Inventors: Kevin O'Brien, Stephan Letts, Christopher Spadaccini, Jeffrey Morse, Steven Buckley, Larry Fischer, Keith Wilson
  • Publication number: 20070020391
    Abstract: A system of fabricating a composite membrane from a membrane substrate using solvent-less vapor deposition followed by in-situ polymerization. A first monomer and a second monomer are directed into a mixing chamber in a deposition chamber. The first monomer and the second monomer are mixed in the mixing chamber providing a mixed first monomer and second monomer. The mixed first monomer and second monomer are solvent-less vapor deposited onto the membrane substrate in the deposition chamber. The membrane substrate and the mixed first monomer and second monomer are heated to produce in-situ polymerization and provide the composite membrane.
    Type: Application
    Filed: July 14, 2006
    Publication date: January 25, 2007
    Inventors: Kevin O'Brien, Stephan Letts, Christopher Spadaccini, Jeffrey Morse, Steven Buckley, Larry Fischer, Keith Wilson
  • Publication number: 20050254536
    Abstract: A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges using a substantially high index bonding elastomer or epoxy to a predetermined electromagnetic absorbing arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE and parasitic oscillation modes can be effectively suppressed.
    Type: Application
    Filed: November 8, 2004
    Publication date: November 17, 2005
    Inventors: Lloyd Hackel, Thomas Soules, Scott Fochs, Mark Rotter, Stephan Letts