Issued Patents All Time
Showing 26–50 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5085282 | Method for drilling a well with emulsion drilling fluids | Arthur H. Hale | 1992-02-04 |
| 5083622 | Method for drilling wells | Arthur H. Hale, Ashok K. R. Dewan | 1992-01-28 |
| 5076364 | Gas hydrate inhibition | Arthur H. Hale, Ashok K. R. Dewan | 1991-12-31 |
| 5076373 | Drilling fluids | Arthur H. Hale, Ashok K. R. Dewan | 1991-12-31 |
| 5072794 | Alcohol-in-oil drilling fluid system | Arthur H. Hale | 1991-12-17 |
| 4960507 | Two-step heterocyclic nitrogen extraction from petroleum oils | Wayne Errol Evans | 1990-10-02 |
| 4960865 | Water wash of olefin/carbon monoxide polymer | Zaida Diaz, William W. C. Hart | 1990-10-02 |
| 4871520 | Process and composition for H.sub.2 S removal | Donald C. Olson, John J. Miller, Wayne R. Miller, Zaida Diaz | 1989-10-03 |
| 4861447 | Process for reducing corrosive impurities in sulfolane used for extracting aromatic hydrocarbons | Robert Knott | 1989-08-29 |
| 4810340 | Process for recovering organic values from aqueous solutions containing both organic values and scale-forming ions | Zaida Diaz | 1989-03-07 |
| 4784673 | Desiccant composition for supercritical CO.sub.2 | Zaida Diaz | 1988-11-15 |
| H478 | Selective reduction of sodium in coal by water wash and ion exchange | — | 1988-06-07 |
| 4705676 | Recovery of sulfur from a solid sulfur-containing solution of a solubilized iron chelate | Howard Lam-Ho Fong, Zaida Diaz | 1987-11-10 |
| 4705531 | Reduction of sodium in coal by water wash followed by ion exchange within a pipeline | — | 1987-11-10 |
| 4705530 | Reduction of sodium in coal by water wash and ion exchange with a weak electrolyte | Frank J. Trogus | 1987-11-10 |
| 4704463 | Process for the production epichlorohydrin | — | 1987-11-03 |
| 4696726 | Process for the production of dichlorohydrin | F. Norman Grimsby, John F. Scamehorn | 1987-09-29 |
| 4665240 | Process for the production of dichlorohydrin | Stephen A. Shain | 1987-05-12 |
| 4664902 | Recovery of sulfur from a solid sulfur-containing solution of solubilized iron chelate of nitrilotriacetic acid | Howard Lam-Ho Fong, Zaida Diaz | 1987-05-12 |
| 4657647 | Process for the production of dichlorohydrin and the electrodialysis thereof | F. Norman Grimsby | 1987-04-14 |
| 4620912 | Process for the production of dichlorohydrin | F. Norman Grimsby | 1986-11-04 |
| 4620911 | Process for the production of dichlorohydrin | E. Gordon Foster, F. Norman Grimsby | 1986-11-04 |
| 4599178 | Recovery of glycerine from saline waters | — | 1986-07-08 |
| 4560812 | Recovery of glycerine from saline waters | — | 1985-12-24 |
| 4536382 | Process for the conversion of H.sub.2 S and adjustment of the H.sub.2 /CO ratio in gaseous streams containing hydrogen sulfide, hydrogen, and carbon monoxide | — | 1985-08-20 |