Issued Patents All Time
Showing 25 most recent of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5105024 | Process for concurrently producing propylene and methyltertiarybutyl ether | Michael L. Gray | 1992-04-14 |
| 4926005 | Dehydrogenation process | Michael E. Olbrich, Dean Montgomery, by B. Jean, administratrix Montgomery | 1990-05-15 |
| 4902849 | Dehydrogenation process | Michael E. Olbrich | 1990-02-20 |
| 4728629 | Cracking catalyst restoration with aluminum compounds | Brent J. Bertus, H. Wayne Mark | 1988-03-01 |
| 4664779 | Cracking catalyst restoration with aluminum compounds | Brent J. Bertus, H. Wayne Mark | 1987-05-12 |
| 4584283 | Cracking catalyst restoration with aluminum compounds | Brent J. Bertus, H. Wayne Mark | 1986-04-22 |
| 4562167 | Liquid treating agent for cracking catalyst | Brent J. Bertus | 1985-12-31 |
| 4535066 | Passivating metals on cracking catalysts | Harold W. Mark, Brent J. Bertus, John S. Roberts, Lyle E. Fenska | 1985-08-13 |
| 4490299 | Germanium dithiophosphate | Brent J. Bertus | 1984-12-25 |
| 4489169 | Cracking catalyst | Brent J. Bertus | 1984-12-18 |
| 4473463 | Use of cracking catalysts passivated by barium | Brent J. Bertus | 1984-09-25 |
| 4459366 | Passivating metals on cracking catalysts | Harold W. Mark, Brent J. Bertus, John S. Roberts, Lyle E. Fenska | 1984-07-10 |
| 4457693 | Combustion process | — | 1984-07-03 |
| 4439536 | Hydrocarbon cracking catalyst | Brent J. Bertus | 1984-03-27 |
| 4415440 | Cracking catalyst improvement with gallium compounds | John S. Roberts, Brent J. Bertus | 1983-11-15 |
| 4411777 | Producing increased yield of hydrogen by cracking petroleum with potassium-containing catalyst | — | 1983-10-25 |
| 4397767 | Catalyst poisons passivated with tin compounds plus both sulfur and phosphorus | John S. Roberts, Brent J. Bertus, H. Wayne Mark | 1983-08-09 |
| 4386015 | Hydrocarbon cracking zeolitic catalyst | Brent J. Bertus | 1983-05-31 |
| 4377494 | Cracking catalysts passivated by barium | Brent J. Bertus | 1983-03-22 |
| 4377504 | Cracking catalyst improvement with gallium compounds | John S. Roberts, Brent J. Bertus | 1983-03-22 |
| 4367136 | Catalyst regeneration | — | 1983-01-04 |
| 4348304 | Cracking process and catalyst for same | John S. Roberts, Brent J. Bertus | 1982-09-07 |
| 4335021 | Catalyst regeneration | — | 1982-06-15 |
| 4334979 | Hydrocarbon cracking process using a catalyst containing germanium | Brent J. Bertus | 1982-06-15 |
| 4331563 | Producing increased yield of hydrogen by cracking petroleum with potassium-containing catalyst | — | 1982-05-25 |