Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857226 | Thixotropic clay aqueous suspensions containing polyacrylic acid polymer or copolymer stabilizers | Julien Drapier, Daniel van de Gaer | 1989-08-15 |
| 4801395 | Thixotropic clay aqueous suspensions containing long chain saturated fatty acid stabilizers | Georges Chazard, Julien Drapier, Daniel van de Gaer | 1989-01-31 |