Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6531103 | Process for removing sulfur compounds from gas and liquid hydrocarbon streams | Leo E. Hakka | 2003-03-11 |
| 6337059 | Absorbent compositions for the removal of acid gases from gas streams | Craig Norman Schubert, John Dean | 2002-01-08 |
| 5689033 | Process for removal of impurities from light paraffin isomerization feedstocks | Stanley J. Frey | 1997-11-18 |
| 5582714 | Process for the removal of sulfur from petroleum fractions | — | 1996-12-10 |
| 5569788 | Process for removal of impurities from etherification feedstocks | Stanley J. Frey | 1996-10-29 |
| 5563315 | Separation of aromatic hydrocarbons from a mixture of aromatic and non-aromatic hydrocarbons by solute swing extraction | — | 1996-10-08 |
| 5406802 | Process for the purification of gases | — | 1995-04-18 |
| 5336840 | Process for the separation of aromatic hydrocarbons with energy redistribution | — | 1994-08-09 |
| 5325672 | Process for the purification of gases | — | 1994-07-05 |
| 5321952 | Process for the purification of gases | — | 1994-06-21 |
| 5202520 | Method for aromatic hydrocarbon recovery | — | 1993-04-13 |
| 5191152 | Process for the separation of aromatic hydrocarbons with energy redistribution | — | 1993-03-02 |
| 5176821 | Process for the separation of aromatic hydrocarbons with energy redistribution | — | 1993-01-05 |
| 5139651 | Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents | — | 1992-08-18 |
| 5073669 | Method for aromatic hydrocarbon recovery | — | 1991-12-17 |
| 5022981 | Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents | — | 1991-06-11 |
| 4781820 | Aromatic extraction process using mixed polyalkylene glycols/glycol ether solvents | — | 1988-11-01 |
| 4693810 | Process for the separation of hydrocarbons from a mixed feedstock | Jose A. Vidueira | 1987-09-15 |
| 4690733 | Process for the separation of hydrocarbons from a mixed feedstock | Jose A. Vidueira | 1987-09-01 |
| 4664786 | Process for the separation of hydrocarbons from a mixed feedstock | Jose A. Vidueira | 1987-05-12 |
| 4571295 | Aromatic/nonaromatic separations | — | 1986-02-18 |
| 4498980 | Separation of aromatic and nonaromatic components in mixed hydrocarbon feeds | — | 1985-02-12 |
| 4401560 | Process for the separation of aromatic hydrocarbons from petroleum fractions with heat recovery | Jose A. Vidueira, Kenneth F. Butwell | 1983-08-30 |
| 4260476 | Separation of aromatic hydrocarbons from petroleum fractions | Jose A. Vidueira, George S. Somekh | 1981-04-07 |
| 4247521 | Liquid-liquid contacting system | George S. Somekh | 1981-01-27 |