Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7678237 | Heat integrated distillation column | Johannes de Graauw, Maarten Jan Steenbakker, Arie De Rijke, Zarko Olujic | 2010-03-16 |
| 6890441 | Hydraulic annular washing column, and process for separating solids from a suspension | Johannes de Graauw | 2005-05-10 |