Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5067416 | Process for producing an acid-resistant barrier seal in soil, and concrete usable for this purpose | Francis Delmas | 1991-11-26 |
| 4983075 | Process for producing an acid-resistant barrier seal in soil, and concrete usable for this purpose | Francis Delmas | 1991-01-08 |