Patents by Inventor Jiawen Dong

Jiawen Dong 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).

  • Purified polymeric materials and methods of purifying polymeric materials
    Patent number: 7314907
    Abstract: A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a filtered polymeric composition having reduced levels of particulate impurities. The filtered polymeric composition prepared is suitable for use in data storage media applications.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: January 1, 2008
    Assignee: General Electric Company
    Inventors: Jiawen Dong, Hua Guo, Robert John Hossan, Christian Lietzau, Vijay Mhetar
  • Methods of preparing a polymeric material
    Patent number: 7256225
    Abstract: A method is disclosed to prepare a polymeric material by filtering solutions of poly(arylene ether) and/or poly(alkenyl aromatic) through one or more filtration systems to provide a material having reduced levels of particulate impurities. The polymeric material prepared is suitable for use in data storage media applications.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: August 14, 2007
    Assignee: General Electric Company
    Inventors: Paul W. Buckley, Jiawen Dong, Mark H. Giammattei, Hua Guo, Norberto Silvi
  • Methods of purifying polymeric material
    Patent number: 7244813
    Abstract: A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a polymeric material having reduced levels of particulate impurities. The polymeric material prepared is suitable for use in data storage media applications.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: July 17, 2007
    Assignee: General Electric Company
    Inventors: Jiawen Dong, Hua Guo, Robert John Hossan
  • Methods of preparing a polymeric material composite
    Patent number: 7041780
    Abstract: Methods to prepare a poly(arylene ether) and poly(alkenyl aromatic) polymeric material having reduced levels of particulate impurities are described. The polymeric material prepared is suitable for use in data storage media applications.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: May 9, 2006
    Assignee: General Electric
    Inventors: Paul W. Buckley, Jiawen Dong, Mark H. Giammattei, Hua Guo, Robert John Hossan, Christian Lietzau, Norberto Silvi
  • Method of separating a polymer from a solvent
    Patent number: 6924350
    Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising as upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: August 2, 2005
    Assignee: General Electric Company
    Inventors: Jiawen Dong, Mark H. Giammattei, Norberto Silvi
  • Purified polymeric materials and methods of purifying polymeric materials
    Publication number: 20050064129
    Abstract: A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a filtered polymeric composition having reduced levels of particulate impurities. The filtered polymeric composition prepared is suitable for use in data storage media applications.
    Type: Application
    Filed: August 19, 2004
    Publication date: March 24, 2005
    Inventors: Jiawen Dong, Hua Guo, Robert Hossan, Christian Lietzau, Vijay Mhetar
  • Methods of preparing a polymeric material
    Publication number: 20050049333
    Abstract: A method is disclosed to prepare a polymeric material by filtering solutions of poly(arylene ether) and/or poly(alkenyl aromatic) through one or more filtration systems to provide a material having reduced levels of particulate impurities. The polymeric material prepared is suitable for use in data storage media applications.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 3, 2005
    Inventors: Paul Buckley, Jiawen Dong, Mark Giammattei, Hua Guo, Norberto Silvi
  • Methods of purifying polymeric material
    Publication number: 20050046070
    Abstract: A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a polymeric material having reduced levels of particulate impurities. The polymeric material prepared is suitable for use in data storage media applications.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 3, 2005
    Inventors: Jiawen Dong, Hua Guo, Robert Hossan
  • Method of molding articles
    Publication number: 20050046056
    Abstract: A method of molding a disk having improved physical and/or mechanical properties, such as physical stability is described. The method is useful in the molding of disks and disk substrates for data storage media.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 3, 2005
    Inventors: Jiawen Dong, Christopher Goewey, Bruce Harper, Eugene Herrmann, Robert Hossan, Matt Niemeyer
  • METHOD OF SEPARATING A POLYMER FROM A SOLVENT
    Publication number: 20050049394
    Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 3, 2005
    Inventors: Jiawen Dong, Mark Giammattei, Norberto Silvi
  • Methods of preparing a polymeric material composite
    Publication number: 20050049362
    Abstract: Methods to prepare a poly(arylene ether) and poly(alkenyl aromatic) polymeric material having reduced levels of particulate impurities are described. The polymeric material prepared is suitable for use in data storage media applications.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 3, 2005
    Inventors: Paul Buckley, Jiawen Dong, Mark Giammattei, Hua Guo, Robert Hossan, Christian Lietzau, Norberto Silvi