Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6403659 | Sealer from SDA asphalt | D. Chris Boyer | 2002-06-11 |
| 6383365 | Low softening point petroleum pitch and sealer | D. Chris Boyer | 2002-05-07 |
| 6361591 | Sealer from asphalt and pitch | D. Chris Boyer | 2002-03-26 |
| 6352637 | High coking value pitch | Melvin D. Kiser, Robert H. Wombles | 2002-03-05 |