Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889563 | Process for retarding and controlling the formation of gels or precipitates derived from aluminium and corresponding compositions, plus the corresponding applications-in particular regarding oil wells | Alan Parker | 1989-12-26 |
| 4828724 | Drilling fluid to minimize solids disintegration | — | 1989-05-09 |