Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE44175 | Process for preparing 4-aminodiphenylamines | Roger Keranen Rains, Edward Albert Lambers, Antonius Johannes van Hengstum | 2013-04-23 |
| 6140538 | Process for preparing 4-aminodiphenylamines | Roger Keranen Rains, Edward Albert Lambers, Antonius Johannes van Hengstum | 2000-10-31 |