Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9771310 | Styrenated phenol useful as curing agent or plasticizing agent for epoxy resin | Kee Yoon ROH, Jung Hee Jang | 2017-09-26 |
| 9464037 | Styrenated phenol compound and method of preparing the same | Kee Yoon ROH, Jung Hee Jang, Je Young Park | 2016-10-11 |
| 9024073 | Thio compounds and preparing method of the same | Hyung-Jae Lee, Chang Kyo Shin | 2015-05-05 |
| 8835687 | Method for preparation of 4,4′-dinitrodiphenylamine and 4,4′-bis(alkylamino)diphenylamine with the base catalyst complex | Seoung-IL Kim, Han Jin Kwag, Sang Hee Park | 2014-09-16 |
| 8759587 | Method for preparation of 4,4′-dinitrodiphenylamine and 4,4′-bis(alkylamino)diphenylamine by using 4-nitroaniline | Seoung-IL Kim, Han Jin Kwag, Sang Hee Park | 2014-06-24 |
| 8729169 | Synthetic rubber with anti-oxidants for rubber | Hyung-Jae Lee, Chang Kyo Shin | 2014-05-20 |
| 8283477 | Method for preparing N-substituted maleimides | Seung Il Kim, Han Jin Kwag | 2012-10-09 |
| 7528285 | Method for preparing thiomethylphenols | Hyung-Jae Lee | 2009-05-05 |
| 7157605 | Method for preparing 4-aminodiphenylamine | Jong Cheon Park, Kil Sun Lee, Jung Hee Jang | 2007-01-02 |
| 6881865 | Method for preparing cyclohexyl phenyl ketone from 1,3-butadiene and acrylic acid | Young J. Joo, Jeong-Im Won, Tae-Yi Kang | 2005-04-19 |
| 6552229 | Method for preparing 4-nitroso-substituted aromatic amine | Young J. Joo, Jeong-Im Won | 2003-04-22 |
| 6245943 | Method of preparing p-phenylenediamine | Young J. Joo, Jeong-Im Won | 2001-06-12 |
| 6198001 | Manufacturing method for 4-nitrosoaniline from urea and nitrobenzene | Young J. Joo, Jeong-Im Won, Kum-Ui Hwang | 2001-03-06 |
| 6156932 | Preparation of 4,4'-dinitrodiphenylamine from urea and nitrobenzene | Young J. Joo, Jeong-Im Won, Kum-Ui Hwang | 2000-12-05 |
| 6137010 | Method for preparing 4-nitrodiphenylamine and 4-nitrosodiphenylamine from carbanilide | Young J. Joo, Jeong-Im Won, Kum-Ui Hwang | 2000-10-24 |
| 5770774 | Method for preparing 2-methyl-1,4-naphthoquinone (vitamin K.sub.3) | Young J. Joo, Jeong-Im Won, Kum-Ui Hwang | 1998-06-23 |
| 5723675 | Method for preparing anthraquinones | Young J. Joo, Jeong-Im Won, Kum-Ui Hwang | 1998-03-03 |