Patents by Inventor Yeon Ja LEE

Yeon Ja LEE 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).

  • Catalyst composition for the synthesis of multi-walled carbon nantubes
    Patent number: 9321651
    Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: April 26, 2016
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Sang Kyu Choi, Sang Hyo Ryu, Ho Soo Hwang, Chung Heon Jeong, Dong Hoon Oh, Yeon Ja Lee, Youngchan Jang
  • CATALYST COMPOSITION FOR THE SYNTHESIS OF MULTI-WALLED CARBON NANOTUBES
    Publication number: 20150353360
    Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.
    Type: Application
    Filed: August 21, 2015
    Publication date: December 10, 2015
    Applicant: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Sang Kyu CHOI, Sang Hyo RYU, Ho Soo HWANG, Chung Heon JEONG, Dong Hoon OH, Yeon Ja LEE, Youngchan JANG
  • Catalyst composition for the synthesis of multi-walled carbon nanotubes
    Patent number: 9186656
    Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: November 17, 2015
    Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
    Inventors: Sang Kyu Choi, Sang Hyo Ryu, Ho Soo Hwang, Chung Heon Jeong, Dong Hoon Oh, Yeon Ja Lee, Youngchan Jang
  • CATALYST COMPOSITION FOR THE SYNTHESIS OF MULTI-WALLED CARBON NANOTUBES
    Publication number: 20140087184
    Abstract: The present invention relates to a catalyst composition for the synthesis of multi-walled carbon nanotube having high apparent density in a manner of high yield. More particularly, this invention relates to a multi-component metal catalyst composition comprising i) main catalyst of Fe and Mo, ii) inactive support of Al and iii) optional co-catalyst at least one selected from Co, Ni, Ti, Mn, W, Sn or Cu. Further, the present invention affords multi-walled carbon nanotube having 5˜15 nm of fibrous diameter and 0.5˜4 ?m bundle diameter.
    Type: Application
    Filed: November 5, 2012
    Publication date: March 27, 2014
    Inventors: Sang Kyu CHOI, Sang Hyo RYU, Ho Soo HWANG, Chung Heon JEONG, Dong Hoon OH, Yeon Ja LEE, Youngchan JANG