Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5055632 | Highly aromatic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics | — | 1991-10-08 |
| 5049281 | Multi-block polymer comprising a first prepolymer, made by combining epoxy with diamine, chain extended with a compatible second prepolymer, the membrane made therefrom and its use in separations | — | 1991-09-17 |
| 5039417 | Membrane made from a multi-block polymer comprising an imide or amide-acid prepolymer chain extended with a compatible second prepolymer and its use in separations | — | 1991-08-13 |
| 5039418 | Membrane made from a multi-block polymer comprising an oxazolidone prepolymer chain extended with a compatible second prepolymer and its use in separations | — | 1991-08-13 |
| 5039422 | Multi-block polymer comprising a urea prepolymer chain extended with a compatible second prepolymer, the membrane made therefrom and its use in separations | — | 1991-08-13 |
| 5030355 | Thin film composite membrane prepared by suspension deposition | — | 1991-07-09 |
| 4983338 | Isocyanurate crosslinked polyurethane membranes and their use for the separation of aromatics from non-aromatics | — | 1991-01-08 |
| 4962270 | Multi-stage pervaporation process run at progressively higher vacuum, higher temperature or both at each successive retentate stage | Joseph L. Feimer, Charles P. Darnell | 1990-10-09 |
| 4962271 | Selective separation of multi-ring aromatic hydrocarbons from distillates by perstraction | Laura E. Black | 1990-10-09 |
| 4929357 | Isocyanurate crosslinked polyurethane membranes and their use for the separation of aromatics from non-aromatics | — | 1990-05-29 |
| 4921611 | Thin film composite membrane prepared by deposition from a solution | — | 1990-05-01 |
| 4914064 | Highly aromatic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics | — | 1990-04-03 |
| 4879044 | Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non aromatics | Joseph L. Feimer, Bernd A. Koenitzer | 1989-11-07 |
| 4861628 | Thin film composite membrane prepared by suspension deposition | — | 1989-08-29 |
| 4837054 | Thin film composite membrane prepared by deposition from a solution | — | 1989-06-06 |
| 4828773 | Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics | Joseph L. Feimer, Bernd A. Koenitzer | 1989-05-09 |
| 4522706 | Hydrocarbon treating processes using perovskite-containing catalytic compositions | Kenneth S. Wheelock | 1985-06-11 |
| 4504379 | Passivation of metal contaminants in cat cracking | Gordon F. Stuntz | 1985-03-12 |
| 4469590 | Process for the hydrogenation of aromatic hydrocarbons | Kenneth S. Wheelock | 1984-09-04 |
| 4452693 | Process for increasing the activity of perovskite catalysts and hydrocarbon treating processes using the activated catalyst | Kenneth S. Wheelock | 1984-06-05 |
| 4446011 | Process for regenerating perovskite catalysts and hydrocarbon treating processes utilizing the regenerated catalyst | Kenneth S. Wheelock | 1984-05-01 |
| 4418008 | Process for increasing the activity of perovskite catalysts and hydrocarbon treating processes using the activated catalyst | Kenneth S. Wheelock | 1983-11-29 |
| 4414099 | Fluid coking with the addition of alkaline earth metal ferrite-containing catalysts | — | 1983-11-08 |
| 4412911 | Process for reactivating perovskite catalysts and hydrocarbon treating processes utilizing the reactivated catalysts | Kenneth S. Wheelock | 1983-11-01 |
| 4411772 | Fluid coking with the addition of perovskite-containing catalysts | Kenneth S. Wheelock | 1983-10-25 |