Patents by Inventor Paul P. Cheng

Paul P. Cheng 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).

  • Melt Processible Semicrystalline Fluoropolymer having Repeating Units Arising from Tetrafluoroethylene, Hexafluoropropylene, and Hydrocarbon Monomer Having a Carboxyl Group and a Polymerizable Carbon-Carbon Double Bond and Multi-Layer Articles Comprising a Layer of the Melt Processible Semicrystalline Fluoropolymer
    Publication number: 20100034919
    Abstract: Disclosed is a melt processible semicrystalline fluoropolymer comprising: (a) about 2 to about 20 weight percent of repeating units arising from hexafluoropropylene; (b) about 0.001 to about 1 weight percent of repeating units arising from a hydrocarbon monomer having a carboxyl group and a polymerizable carbon-carbon double bond; and (c) the remaining weight percent of repeating units arising from tetrafluoroethylene. This melt processible semicrystalline fluoropolymer is impermeable to fuels and is useful as a lining for petroleum fuel tubing, as well as chemical resistance coating for, or adhesive between, perfluoropolymer and other polymers, metals and inorganics.
    Type: Application
    Filed: July 30, 2009
    Publication date: February 11, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Paul Douglas Brothers, Sharon Ann Libert, Ralph Munson Aten, Paul P. Cheng
  • Fade resistant colored sheath/core bicomponent fiber
    Publication number: 20080160278
    Abstract: A fade resistant, colored sheath/core bicomponent fiber can be made from a core formed of a melt dye-containing, dye soluble core polymer and a sheath formed of a dye-free, dye insoluble sheath polymer.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Paul P. Cheng, Robert Howe Peterson
  • Polyamide resin compositions with electromagnetic interference shielding properties and articles formed therefrom
    Patent number: 7022265
    Abstract: Polyamide resin compositions suitable for molded articles comprising polyamide, thermoplastic polyphenol, and of carbon fiber are disclosed. These may optionally include aramid fiber and zinc oxide whisker. Such compositions show remarkable shielding performance when subjected to electromagnetic fields, and with outstanding control of warpage and toughness.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: April 4, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul P. Cheng, Yuji Saga
  • High density composition of matter, articles made therefrom, and processes for the preparation thereof
    Publication number: 20040138361
    Abstract: A high density polymer composition made from compositions comprising (a) polymeric binder comprising polyamide compositions and blends and based on monomers comprising hexamethylenediamine and/or caprolactam, and phenolic novolac resin, and (b) metal or metal alloy powder is disclosed. Articles made from the composition are disclosed. Bullets and other forms of ammunition are preferred articles. Processes for their preparation are also disclosed.
    Type: Application
    Filed: August 7, 2003
    Publication date: July 15, 2004
    Inventor: Paul P. Cheng
  • Polyamide resin compositions with electromagnetic interference shielding properties and articles formed therefrom
    Publication number: 20030199607
    Abstract: Polyamide resin compositions suitable for molded articles comprising polyamide, thermoplastic polyphenol, and of carbon fiber are disclosed. These may optionally include aramid fiber and zinc oxide whisker. Such compositions show remarkable shielding performance when subjected to electromagnetic fields, and with outstanding control of warpage and toughness.
    Type: Application
    Filed: December 19, 2002
    Publication date: October 23, 2003
    Inventors: Paul P. Cheng, Yuji Saga