Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4264568 | Method for easily removing zinc from carbon black contaminated with zinc | Frank C. Haas | 1981-04-28 |
| 4231998 | Method for separating carbon black from fiberglass | — | 1980-11-04 |