Patents by Inventor Larry R. Marshall

Larry R. Marshall 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).

  • Solution spun fiber process
    Patent number: 8747723
    Abstract: The invention relates to a process for forming fibers from a spinning solution utilizing a high speed rotary sprayer. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: June 10, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Larry R Marshall, Jack Eugene Armantrout, Tao Huang, John R. Moore, Neal Pfeiffenberger
  • Solution spun fiber process
    Patent number: 8303874
    Abstract: The invention relates to a process for forming fibers from a spinning solution utilizing a high speed rotary sprayer. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: November 6, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Larry R Marshall, Jack Eugene Armantrout, Tao Huang, John R Moore, Neal Pfeiffenberger
  • Production of nanofibers by melt spinning
    Patent number: 8277711
    Abstract: A process and apparatus for forming nanofibers from a spinning melt utilizing a high speed rotating distribution disc. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: October 2, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Tao Huang, Larry R. Marshall, Jack Eugene Armantrout, Scott Yembrick, William H. Dunn, James M. Oconnor, Tim Mueller, Marios Avgousti, Mark David Wetzel
  • Process for forming uniformly distributed material
    Patent number: 8114325
    Abstract: A fluidized mixture is issued from a nozzle comprising a fan jet at the outlet, causing the mixture to spread as it is issued. The issued material is collected on a moving collection surface located a distance of between 0.25 and 13 cm from the outlet of the nozzle, prior to the onset of large scale turbulence in the fluid jet. The resulting product has good basis weight uniformity.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: February 14, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jack Eugene Armantrout, Robert Anthony Marin, Larry R. Marshall
  • Flash-spun sheet material
    Patent number: 8048513
    Abstract: This invention relates to improved plexifilamentary sheet material useful in protective apparel and filtration media, which material is comprised of substantially continuous polyethylene plexifilamentary fiber strands and has a Frazier Permeability, normalized to 1.0 oz/yd2 basis weight, of at least 2 cfm/ft2.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: November 1, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Robert Anthony Marin, Larry R. Marshall, Barbara K. O'Rourke
  • ROTARY PROCESS FOR FORMING UNIFORM MATERIAL
    Publication number: 20110260357
    Abstract: A thin, uniform membrane comprising polymeric fibrils or a combination of fibrils and particles, wherein the fibrils have randomly convoluted cross-sections, and a process for making the membrane are disclosed. The membrane may be on the surface of a substrate as part of a composite sheet, or as a stand-alone structure.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 27, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: ROBERT ANTHONY MARIN, LARRY R. MARSHALL, AMANDA DAWN MILLER, LEWIS EDWARD MANRING
  • Rotary process for forming uniform material
    Patent number: 7998388
    Abstract: A thin, uniform membrane comprising polymeric fibrils or a combination of fibrils and particles, wherein the fibrils have randomly convoluted cross-sections, and a process for making the membrane are disclosed. The membrane may be on the surface of a substrate as part of a composite sheet, or as a stand-alone structure.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: August 16, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Robert Anthony Marin, Larry R. Marshall, Amanda Dawn Miller
  • Flash-Spun Sheet Material
    Publication number: 20100263108
    Abstract: This invention relates to improved plexifilamentary sheet material useful in protective apparel and filtration media, which material is comprised of substantially continuous polyethylene plexifilamentary fiber strands and has a Frazier Permeability, normalized to 1.0 oz/yd2 basis weight, of at least 2 cfm/ft2.
    Type: Application
    Filed: June 28, 2010
    Publication date: October 21, 2010
    Applicant: E.I. DUPONT DE NEMOURS AND COMPANY
    Inventors: Robert Anthony Marin, Larry R. Marshall, Barbara K. O'Rourke
  • Rotary process for forming uniform material
    Patent number: 7786034
    Abstract: A process is provided for issuing material from a nozzle in a rotor rotating at a given rotational speed wherein the material is issued by way of a fluid jet. The material can be collected on a collector concentric to the rotor. The collector can be a flexible belt moving in the axial direction of the rotor. The collected material can take the form of discrete particles, fibers, plexifilamentary web, discrete fibrils or a membrane.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: August 31, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jack Eugene Armantrout, Lewis Edward Manring, Robert Anthony Marin, Larry R. Marshall
  • Flash-spun sheet material
    Patent number: 7744989
    Abstract: This invention relates to improved plexifilamentary sheet material useful in protective apparel and filtration media, which material is comprised of substantially continuous polyethylene plexifilamentary fiber strands and has a Frazier Permeability, normalized to 1.0 oz/yd2 basis weight, of at least 2 cfm/ft2.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: June 29, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Anthony Marin, Larry R. Marshall, Barbara K. O'Rourke
  • SOLUTION SPUN FIBER PROCESS
    Publication number: 20100032872
    Abstract: The invention relates to a process for forming fibers from a spinning solution utilizing a high speed rotary sprayer. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.
    Type: Application
    Filed: October 16, 2009
    Publication date: February 11, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: LARRY R. MARSHALL, Jack Eugene Armantrout, Tao Huang, John R. Moore, Neal Pfeiffenberger
  • Rotary process for forming uniform material
    Patent number: 7621731
    Abstract: A process is provided for issuing material from a nozzle in a rotor rotating at a given rotational speed wherein the material is issued by way of a fluid jet. The material can be collected on a collector concentric to the rotor. The collector can be a flexible belt moving in the axial direction of the rotor. The collected material can take the form of discrete particles, fibers, plexifilamentary web, discrete fibrils or a membrane.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: November 24, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jack Eugene Armantrout, Lewis Edward Manring, Robert Anthony Marin, Larry R. Marshall
  • ROTARY PROCESS FOR FORMING UNIFORM MATERIAL
    Publication number: 20090218719
    Abstract: A thin, uniform membrane comprising polymeric fibrils or a combination of fibrils and particles, wherein the fibrils have randomly convoluted cross-sections, and a process for making the membrane are disclosed. The membrane may be on the surface of a substrate as part of a composite sheet, or as a stand-alone structure.
    Type: Application
    Filed: May 14, 2009
    Publication date: September 3, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Robert Anthony Marin, Larry R. Marshall, Amanda Dawn Miller, Lewis Edward Manring
  • Rotary process for forming uniform material
    Patent number: 7582240
    Abstract: A thin, uniform membrane comprising polymeric fibrils or a combination of fibrils and particles, wherein the fibrils have randomly convoluted cross-sections, and a process for making the membrane are disclosed. The membrane may be on the surface of a substrate as part of a composite sheet, or as a stand-alone structure.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: September 1, 2009
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Anthony Marin, Larry R. Marshall, Amanda Dawn Miller
  • Process for forming uniformly distributed material
    Publication number: 20080284055
    Abstract: A fluidized mixture is issued from a nozzle comprising a fan jet at the outlet, causing the mixture to spread as it is issued. The issued material is collected on a moving collection surface located a distance of between 0.25 and 13 cm from the outlet of the nozzle, prior to the onset of large scale turbulence in the fluid jet. The resulting product has good basis weight uniformity.
    Type: Application
    Filed: July 25, 2008
    Publication date: November 20, 2008
    Inventors: Jack Eugene Armantrout, Robert Anthony Marin, Larry R. Marshall
  • Production of nanofibers by melt spinning
    Publication number: 20080242171
    Abstract: A process and apparatus for forming nanofibers from a spinning melt utilizing a high speed rotating distribution disc. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.
    Type: Application
    Filed: March 18, 2008
    Publication date: October 2, 2008
    Inventors: Tao Huang, Larry R. Marshall, Jack Eugene Armantrout, Scott Yembrick, willliam H. Dunn, James M. Oconnor, Tim Mueller, Marios Avgousti, Mark David Wetzel
  • FLASH-SPUN SHEET MATERIAL
    Publication number: 20080220681
    Abstract: This invention relates to improved plexifilamentary sheet material useful in protective apparel and filtration media, which material is comprised of substantially continuous polyethylene plexifilamentary fiber strands and has a Frazier Permeability, normalized to 1.0 oz/yd2 basis weight, of at least 2 cfm/ft2.
    Type: Application
    Filed: May 19, 2008
    Publication date: September 11, 2008
    Inventors: Robert Anthony Marin, Larry R. Marshall, Barbara K. O'Rourke
  • Devices with optical gain in silicon
    Patent number: 7211821
    Abstract: A photonic device includes a silicon semiconductor based superlattice. The superlattice has a plurality of layers that form a plurality of repeating units. At least one of the layers in the repeating unit is an optically active layer with at least one species of rare earth ion.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: May 1, 2007
    Assignee: Translucent Photonics, Inc.
    Inventors: Petar B. Atanackovic, Larry R. Marshall
  • Rotary process for forming uniform material
    Patent number: 7118698
    Abstract: A process is provided for issuing material from a nozzle in a rotor rotating at a given rotational speed wherein the material is issued by way of a fluid jet. The material can be collected on a collector concentric to the rotor. The collector can be a flexible belt moving in the axial direction of the rotor. The collected material can take the form of discrete particles, fibers, plexifilamentary web, discrete fibrils or a membrane.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: October 10, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jack Eugene Armantrout, Lewis Edward Manring, Robert Anthony Marin, Larry R. Marshall
  • Devices with optical gain in silicon
    Patent number: 7023011
    Abstract: A photonic device includes a silicon semiconductor based superlattice. The superlattice has a plurality of layers that form a plurality of repeating units. At least one of the layers in the repeating unit is an optically active layer with at least one species of rare earth ion.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: April 4, 2006
    Assignee: Translucent, Inc.
    Inventors: Petar B. Atanackovic, Larry R. Marshall