Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37842 | Regenerating zeolitic cracking catalyst | Harold W. Mark, John S. Roberts, Arnold M. Schaffer | 2002-09-17 |
| RE37789 | Regenerating zeolitic cracking catalyst | Harold W. Mark, John S. Roberts, Arnold M. Schaffer | 2002-07-16 |