Patents by Inventor Chang-Ryang Jang

Chang-Ryang Jang 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).

  • Method of preparing vinyl chloride polymers having superior processability
    Patent number: 9428601
    Abstract: The present invention relates to a method of preparing a vinyl chloride polymer, and more precisely, a method of preparing a vinyl chloride polymer having excellent processability by raising a final polymerization temperature up to 5˜20° C. from an first polymerization temperature.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: August 30, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Seong-Yong Ahn, Kyung-Hyun Kim, Young-Suk Kim, Jong-Hun Cho, Chang-Ryang Jang
  • Method for production of vinyl chloride-based polymer by suspension polymerization
    Patent number: 9315596
    Abstract: The present invention provides a method of preparing vinyl chloride polymer having excellent processability and high bulk density by the separate stepwise additions of vinyl chloride monomer during suspension polymerization.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: April 19, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Seong-Yong Ahn, Kyung-Hyun Kim, Young-Suk Kim, Jong-Hun Cho, Chang-Ryang Jang
  • METHOD OF PREPARING VINYL CHLORIDE POLYMERS HAVING SUPERIOR PROCESSABILITY
    Publication number: 20100267912
    Abstract: The present invention relates to a method of preparing a vinyl chloride polymer, and more precisely, a method of preparing a vinyl chloride polymer having excellent processability by raising a final polymerization temperature up to 5˜20° C. from an first polymerization temperature.
    Type: Application
    Filed: February 5, 2007
    Publication date: October 21, 2010
    Applicant: LG Chem, Ltd.
    Inventors: Seong-Yong Ahn, Kyung-Hyun Kim, Young-Suk Kim, Jong-Hun Cho, Chang-Ryang Jang
  • METHOD FOR PRODUCTION OF VINYL CHLORIDE-BASED POLYMER BY SUSPENSION POLYMERIZATION
    Publication number: 20100190946
    Abstract: The present invention provides a method of preparing vinyl chloride polymer having excellent processability and high bulk density by the separate stepwise additions of vinyl chloride monomer during suspension polymerization.
    Type: Application
    Filed: February 9, 2007
    Publication date: July 29, 2010
    Applicant: LG CHEM, LTD
    Inventors: Seong-Yong Ahn, Kyung-Hyun Kim, Young-Suk Kim, Jong-Hun Cho, Chang-Ryang Jang