Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857111 | Thixotropic formulations, use of polycarboxylic acid amides to produce them, and silica coated with polycarboxylic acid amides | Karl-Heinz Haubennestel, Holger Heilmann | 1989-08-15 |