Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8063241 | Process for the preparation of toluene-diisocyanate | Wolfgang Lorenz, Lars Padeken, Friedhelm Steffens, Lothar Weismantel | 2011-11-22 |
| 8030522 | Process for the production of toluene diisocyanate | Joachim Zechlin, Friedhelm Steffens, Wenbin JI | 2011-10-04 |