Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874594 | Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof | — | 1989-10-17 |
| 4842838 | Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof | — | 1989-06-27 |