Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4328199 | Method for producing carbon black | Paul J. Cheng | 1982-05-04 |
| 4316876 | Apparatus for producing carbon black | Paul H. Johnson | 1982-02-23 |
| 4315901 | Process for producing carbon black | Paul J. Cheng | 1982-02-16 |