Patents by Inventor Lein Ngaw

Lein Ngaw 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).

  • Publication number: 20040217336
    Abstract: An electrically conductive composite comprising a polyvinylidene fluoride polymer or copolymer and carbon nanotubes is provided. Preferably, carbon nanotubes may be present in the range of about 0.5-20% by weight of the composite.
    Type: Application
    Filed: June 9, 2004
    Publication date: November 4, 2004
    Applicant: Hyperion Catalysis International, Inc.
    Inventors: Chunming Niu, Lein Ngaw, Alan Fischer, Robert Hoch
  • Patent number: 6783702
    Abstract: An electrically conductive composite comprising a polyvinylidene fluoride polymer or copolymer and carbon nanotubes is provided. Preferably, carbon nanotubes may be present in the range of about 0.5-20% by weight of the composite. The composites are prepared by dissolving the polymer in a first solvent to form a polymer solution and then adding the carbon nanotubes into the solution. The solution is mixed using an energy source such as a sonicator or a Waring blender. A precipitating component is added to precipitate out a composite comprising the polymer and the nanotubes. The composite is isolated by filtering the solution and drying the composite.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: August 31, 2004
    Assignee: Hyperion Catalysis International, Inc.
    Inventors: Chunming Niu, Lein Ngaw, Alan Fischer, Robert Hoch
  • Patent number: 6746627
    Abstract: An electrically conductive composite comprising a polyvinylidene fluoride polymer or copolymer and carbon nanotubes is provided. Preferably, carbon nanotubes may be present in the range of about 0.5-20% by weight of the composite. The composites are prepared by mixing or dispersing carbon nanotubes in polymer emulsion using an energy source such as a Waring blender. The liquid in the mixture is then evaporated to obtain the composite comprising the polymer and the nanotubes.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: June 8, 2004
    Assignee: Hyperion Catalysis International, Inc.
    Inventors: Chunming Niu, Lein Ngaw
  • Publication number: 20030111646
    Abstract: An electrically conductive composite comprising a polyvinylidene fluoride polymer or copolymer and carbon nanotubes is provided. Preferably, carbon nanotubes may be present in the range of about 0.5-20% by weight of the composite.
    Type: Application
    Filed: November 20, 2001
    Publication date: June 19, 2003
    Inventors: Chunming Niu, Lein Ngaw
  • Publication number: 20030089890
    Abstract: An electrically conductive composite comprising a polyvinylidene fluoride polymer or copolymer and carbon nanotubes is provided. Preferably, carbon nanotubes may be present in the range of about 0.5-20% by weight of the composite.
    Type: Application
    Filed: July 11, 2001
    Publication date: May 15, 2003
    Inventors: Chunming Niu, Lein Ngaw, Alan Fischer, Robert Hoch
  • Publication number: 20030089893
    Abstract: A polymer composite composed of a polymerized mixture of functionalized carbon nanotubes and monomer which chemically reacts with the functionalized nanotubes. The carbon nanotubes are functionalized by reacting with oxidizing or other chemical media through chemical reactions or physical adsorption. The reacted surface carbons of the nanotubes are further functionalized with chemical moieties that react with the surface carbons and selected monomers. The functionalized nanotubes are first dispersed in an appropriate medium such as water, alcohol or a liquefied monomer and then the mixture is polymerized. The polymerization results in polymer chains of increasing weight bound to the surface carbons of the nanotubes. The composite may consists of some polymer chains imbedded in the composite without attachment to the nanotubes.
    Type: Application
    Filed: October 29, 2002
    Publication date: May 15, 2003
    Applicant: Hyperion Catalysis International, Inc.
    Inventors: Chunming Niu, Lein Ngaw