Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5534611 | Sulfonated and carboxylated aminoethylenephosphonic acid and aminobis (methylene) phosphinic acid | Robert K. Gabel | 1996-07-09 |
| 5417759 | Set retarding additive for cement slurries | — | 1995-05-23 |
| 5202035 | Liquid aluminum phosphate salt gelling agent | — | 1993-04-13 |
| 5147964 | Method for reducing fluid loss from oilfield cement slurries using vinyl grafted wattle tannin | Robert K. Gabel, Charles D. Williamson | 1992-09-15 |
| 5134215 | Method for reducing fluid loss from oilfield cement slurries using vinyl grafted wattle tannin | Robert K. Gabel, Charles D. Williamson | 1992-07-28 |
| 5110485 | Liquid aluminum phosphate salt gelling agent | — | 1992-05-05 |
| 5057233 | Hydrocarbon geller and method for making the same | — | 1991-10-15 |
| 5032297 | Enzymatically degradable fluid loss additive | Charles D. Williamson, Stephan J. Allenson, Robert K. Gabel | 1991-07-16 |
| 5028271 | Vinyl grafted lignite fluid loss additives | Charles D. Williamson | 1991-07-02 |
| 4938803 | Vinyl grafted lignite fluid loss additives | Charles D. Williamson | 1990-07-03 |
| 4877894 | Hydrocarbon geller and method for making the same | — | 1989-10-31 |
| 4781845 | Hydrocarbon gellant | Allen R. Syrinek | 1988-11-01 |