Patents by Inventor David Zumbrunnen

David Zumbrunnen 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: 7858677
    Abstract: A composite comprising a first melt processable material referred to as a masterbatch which includes particulate material master batch and a second melt-processable material said first melt processable material and said second melt processable material are formed into a multilayer arrangement by chaotic advection and wherein said particulate material is oriented within layers, or forms networks in said first melt-processable material.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: December 28, 2010
    Assignee: Clemson University
    Inventor: David A Zumbrunnen
  • Publication number: 20090211343
    Abstract: An in-situ structuring rheometer provides a means to develop and measure the rheological properties of structured materials such as those having various polymer blend morphologies or particle networks. Chaotic advection of liquid contained within a cavity is instilled by controlled motions of boundary surfaces and, concomitantly, forces and displacements on the boundary surfaces are measured, indicating at least one of a flow- or a structure-related property.
    Type: Application
    Filed: January 21, 2009
    Publication date: August 27, 2009
    Inventors: David Zumbrunnen, Graham Harrison
  • Patent number: 7514492
    Abstract: A method and types of composites in which particles are oriented within a melt-processable material or are arranged into networks in response to chaotic advection. A masterbatch comprising a melt-processable material and particles is supplied to a blender in which chaotic advection is maintained for a specified period. A second, melt-processable material may be supplied to the blender simultaneously. Resulting composites include extrusions with oriented inorganic platelets that reduce permeation or electrically conducting plastics and other functional materials.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: April 7, 2009
    Assignee: Clemson University
    Inventor: David A. Zumbrunnen
  • Publication number: 20080262125
    Abstract: A composite comprising a first melt processable material referred to as a masterbatch which includes particulate material master batch and a second melt-processable material said first melt processable material and said second melt processable material are formed into a multilayer arrangement by chaotic advection and wherein said particulate material is oriented within layers, or forms networks in said first melt-processable material.
    Type: Application
    Filed: October 9, 2007
    Publication date: October 23, 2008
    Inventor: David A Zumbrunnen
  • Patent number: 7377684
    Abstract: A blending system incorporating a blender with an operating cavity housing a plurality of elongate rod elements extending at least partially along the length of the operating cavity such that controlled relative movement between the rod elements and a multi-constituent composition within the operating cavity causes the development of predefined structures within the multi-constituent composition. The cavity within the blender incorporates a diminished cross-section in the vicinity of its terminal end. Methods to provide controlled development of microstructures and properties are also provided.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: May 27, 2008
    Assignee: Clemson University
    Inventor: David A. Zumbrunnen
  • Publication number: 20070135553
    Abstract: A method and types of composites in which particles are oriented within a melt-processable material or are arranged into networks in response to chaotic advection. A masterbatch comprising a melt-processable material and particles is supplied to a blender in which chaotic advection is maintained for a specified period. A second, melt-processable material may be supplied to the blender simultaneously. Resulting composites include extrusions with oriented inorganic platelets that reduce permeation or electrically conducting plastics and other functional materials.
    Type: Application
    Filed: February 1, 2007
    Publication date: June 14, 2007
    Inventor: David Zumbrunnen
  • Publication number: 20050265119
    Abstract: A blending system incorporating a blender with an operating cavity housing a plurality of elongate rod elements extending at least partially along the length of the operating cavity such that controlled relative movement between the rod elements and a multi-constituent composition within the operating cavity causes the development of predefined structures within the multi-constituent composition. The cavity within the blender incorporates a diminished cross-section in the vicinity of its terminal end. Methods to provide controlled development of microstructures and properties are also provided.
    Type: Application
    Filed: May 26, 2005
    Publication date: December 1, 2005
    Inventor: David Zumbrunnen
  • Patent number: 6902805
    Abstract: Chaotic advection causes the formation of various encapsulates in binary phase composites. Such composites are successfully formed with thermoplastics that are present in desired amounts by weight or volume. With a batch type chaotic mixer, the process starts with selecting suitable polymers, mechanically mixing the raw material, heating the mixture, instilling chaotic advection by agitation for a period of time and cooling and recovering the composite. With continuous flow types of chaotic mixers, the process starts with melting the component polymers in separate extruders capable of component melt flows in predetermined proportions.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: June 7, 2005
    Inventors: David A. Zumbrunnen, Michael S. Ellison, Bridgette L. Gomillion
  • Publication number: 20050113503
    Abstract: A method and types of composites in which particles are oriented within a melt-processable material or are arranged into networks in response to chaotic advection. A masterbatch comprising a melt-processable material and particles is supplied to a blender in which chaotic advection is maintained for a specified period. A second, melt-processable material may be supplied to the blender simultaneously. Resulting composites include extrusions with oriented inorganic platelets that reduce permeation or electrically conducting plastics and other functional materials.
    Type: Application
    Filed: October 1, 2004
    Publication date: May 26, 2005
    Inventor: David Zumbrunnen
  • Publication number: 20040180204
    Abstract: Chaotic advection causes the formation of various encapsulates in binary phase composites. Such composites are successfully formed with thermoplastics that are present in desired amounts by weight or volume. With a batch type chaotic mixer, the process starts with selecting suitable polymers, mechanically mixing the raw material, heating the mixture, instilling chaotic advection by agitation for a period of time and cooling and recovering the composite. With continuous flow types of chaotic mixers, the process starts with melting the component polymers in separate extruders capable of component melt flows in predetermined proportions.
    Type: Application
    Filed: March 10, 2003
    Publication date: September 16, 2004
    Inventors: David A. Zumbrunnen, Michael S. Ellison, Bridgette L. Gomillion
  • Patent number: 6770340
    Abstract: A method for the production of a multiple phase composite material, wherein the composite material includes a major phase component and at least one minor phase component. The major and minor phase components are arranged in a desired predefined morphological structure in which the major phase component and the minor phase components have predefined size and shape characteristics. The method involves supplying the major phase component to a chaotic mixer (10) in a controlled manner and supplying the minor phase components to the chaotic mixer (10) in a controlled manner. Within the chaotic mixer (10) the major phase component and minor phase components undergo mixing according to controlled parameters to controllably and progressively develop predefined desired morphologies. Resulting structures are also provided.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: August 3, 2004
    Assignee: Clemson University
    Inventors: David A. Zumbrunnen, Ojin Kwon
  • Publication number: 20020053753
    Abstract: A method for the production of a multiple phase composite material, wherein the composite material includes a major phase component and at least one minor phase component. The major and minor phase components are arranged in a desired predefined morphological structure in which the major phase component and the minor phase components have predefined size and shape characteristics. The method involves supplying the major phase component to a chaotic mixer (10) in a controlled manner and supplying the minor phase components to the chaotic mixer (10) in a controlled manner. Within the chaotic mixer (10) the major phase component and minor phase components undergo mixing according to controlled parameters to controllably and progressively develop predefined desired morphologies. Resulting structures are also provided.
    Type: Application
    Filed: September 25, 2001
    Publication date: May 9, 2002
    Inventors: David A. Zumbrunnen, Ojin Kwon