Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9029603 | Process for preparing alkylated p-phenylenediamines | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng | 2015-05-12 |
| 8686188 | Process for preparing 4-aminodiphenylamine | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng, Renping Jiao | 2014-04-01 |
| 8486223 | Falling film evaporator | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng | 2013-07-16 |
| 8349230 | Spherical rubber chemicals and the method for preparing the same | Nongyue Wang, Xiaogen Feng, Qianwen Cheng, Luxin Wang | 2013-01-08 |
| 8293673 | Process for preparing 4-aminodiphenylamine | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng | 2012-10-23 |
| 8206596 | Magnetic separation apparatus and method for recovery of solid material from solid-liquid mixture | Nongyue Wang, Xiaogen Feng | 2012-06-26 |
| 8066919 | Spherical rubber chemicals and the method for preparing the same | Nongyue Wang, Xiaogen Feng, Qianwan Cheng, Luxin Wang | 2011-11-29 |
| 7989662 | Process for preparing 4-aminodiphenylamine | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng | 2011-08-02 |
| 7235694 | Process for preparing 4-aminodiphenylamine | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng | 2007-06-26 |
| 7176333 | Process for preparing 4-aminodiphenylamine | Nongyue Wang, Ruibiao Yu, Xiaogen Feng, Qianwen Cheng | 2007-02-13 |
| 7084302 | Process for preparing 4-aminodiphenylamine | Xiaogen Feng, Nongyue Wang, Ruibiao Yu, Qianwen Cheng | 2006-08-01 |