Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882373 | Asphaltic composition | — | 1989-11-21 |
| 4873275 | Flow resistant asphalt paving binder | Lawrence G. Kaufman | 1989-10-10 |
| 4868233 | Polyethylene modified asphalts | — | 1989-09-19 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882373 | Asphaltic composition | — | 1989-11-21 |
| 4873275 | Flow resistant asphalt paving binder | Lawrence G. Kaufman | 1989-10-10 |
| 4868233 | Polyethylene modified asphalts | — | 1989-09-19 |