Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4935391 | Process for preparing a purified mineral coating | Frank E. Caropreso, Harry M. Castrantas | 1990-06-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4935391 | Process for preparing a purified mineral coating | Frank E. Caropreso, Harry M. Castrantas | 1990-06-19 |