Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5122257 | Process for the manufacture of kerosene and/or gas oils | Henricus J. A. Van Helden, Henricus M. J. Bijwaard | 1992-06-16 |
| 4994171 | Process for the manufacture--gas oils | Henricus J. A. Van Helden, Woutherus M. M. Dekkers | 1991-02-19 |