Patents by Inventor Jeong D. Suh

Jeong D. Suh 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).

  • Pre-expanded articles of a polyolefin resin having microcell and process for preparing thereof
    Patent number: 5599850
    Abstract: The present invention relates to a process for preparing pre-expanded articles of a polyolefin resin wherein a blowing agent is incorporated into the polyolefin resin in an amount of 45 to 90 parts by volume with respect to 100 parts by volume of the resin and the pre-expansion is carried out at a temperature in the range of from Tm -35.degree. C. to Tm -20.degree. C., or a second external pressured gas which facilitate the impregnation efficiency of the blowing agent is further introduced in an amount of expressing an additional pressure more than 10 kg/cm.sup.2 with the blowing agent. Also, the present invention relates to pre-expanded articles of a polyolefin resin produced by the above process.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: February 4, 1997
    Assignee: Hanwha Chemical Corporation
    Inventors: Young H. Park, Jeong D. Suh, Young D. Lee, Tae H. Kwack, Won J. Choi