Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5922192 | Apparatus and process for reducing coking of heat exchange surfaces | Gerhard Zimmermann | 1999-07-13 |
| 5849176 | Process for producing thermally cracked products from hydrocarbons | Gerhard Zimmermann | 1998-12-15 |