Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6136899 | SBR for asphalt cement modification | Laurand Henry Lewandowski | 2000-10-24 |
| 5986010 | Polymer for asphalt cement modification | Jean Steininger Clites, Howard A. Colvin | 1999-11-16 |
| 5902852 | Asphalt cement modification | Gerald Owen Schulz | 1999-05-11 |
| 5837756 | Polymer for asphalt cement modification | Jean Steininger Clites, Howard A. Colvin | 1998-11-17 |
| 5733955 | Asphalt cement modification | Gerald Owen Schulz | 1998-03-31 |
| 5637640 | Asphalt cement modification | Gerald Owen Schulz | 1997-06-10 |
| 5534568 | Asphalt cement modification | Gerald Owen Schulz | 1996-07-09 |
| 5005625 | Pneumatic tire having air retention innerliner | Roger Neil Beers | 1991-04-09 |