Patents by Inventor Chung-Ryol Jeong

Chung-Ryol Jeong 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).

  • Polyoxymethylene Resin Composition Having An Excellent Heat Stability
    Publication number: 20080097012
    Abstract: Disclosed herein is a polyoxymethylene resin composition which comprises 100 parts by weight of a polyoxymethylene polymer (A), 0.005-2 parts by weight of an amine-substituted triazine compound (B), 0.01-5 parts by weight of a compound (C) prepared by grafting 0.05-5 parts by weight of anhydrous maleic acid onto an ethylene-propylene copolymer and an ethylene-propylene terpolymer, and 0.001-2 parts by weight of 1,12-dodecanedicarboxylic acid dihydrazide (D). The polyoxymethylene resin composition is highly thermally stable, and shows reduced generation of formaldehyde gas, particularly, during molding and from final molded products.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 24, 2008
    Inventors: Tak-Kyu Kim, Chung-Ryol Jeong, Do-Young Lee
  • Poloyoxymethylene Composition Having High Fuel Resistance And Shaped Article Produced Therefrom
    Publication number: 20070276070
    Abstract: Disclosed is a polyoxymethylene composition having high fuel resistance, which includes a polyoxymethylene polymer, magnesium stearate, and an antioxidant. Also, a shaped article produced from the polyoxymethylene composition is provided, which is suitable for use in fuel feeding and circulation systems of automobiles.
    Type: Application
    Filed: December 17, 2004
    Publication date: November 29, 2007
    Inventors: Tak-Kyu Kim, Chung-Ryol Jeong, Ki-Chul Shin