Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5191153 | Method for preparing olefin complexing reagents and use thereof | Ted H. Cymbaluk, Marvin M. Johnson, Gerhard P. Nowack | 1993-03-02 |
| 5104570 | Method for preparing olefin complexing reagents and use thereof | Ted H. Cymbaluk, Marvin M. Johnson, Gerhard P. Nowack | 1992-04-14 |
| 5055174 | Hydrovisbreaking process for hydrocarbon containing feed streams | Jerald A. Howell, Thomas Davis, Simon G. Kukes | 1991-10-08 |
| 4954467 | Passivation of metal contaminated cracking catalysts using aqueous suspensions of antimony oxide | Marvin M. Johnson | 1990-09-04 |
| 4939109 | Passivation of metal contaminated cracking catalysts | Marvin M. Johnson | 1990-07-03 |
| 4933095 | Stable antimony compositions for the passivation of metal contaminated cracking catalysts | Marvin M. Johnson | 1990-06-12 |
| 4927795 | Passivation of metal contaminated cracking catalysts | Marvin M. Johnson | 1990-05-22 |
| 4789460 | Process for facilitating filtration of used lubricating oil | Marvin M. Johnson | 1988-12-06 |
| 4592830 | Hydrovisbreaking process for hydrocarbon containing feed streams | Jerald A. Howell, Donald M. Haskell | 1986-06-03 |
| 4522729 | Filtration of oil | — | 1985-06-11 |
| 4503249 | Hydrogenation catalysts | Gerhard P. Nowack, Marvin M. Johnson | 1985-03-05 |
| 4502948 | Reclaiming used lubricating oil | — | 1985-03-05 |
| 4431523 | Upgrading fuel fractions in a re-refined oil process | Jerald A. Howell | 1984-02-14 |
| 4420389 | De-ashing lubricating oils | Alden E. Beckworth, Jerald A. Howell | 1983-12-13 |
| 4401640 | Hydrogenation catalysts | Gerhard P. Nowack, Marvin M. Johnson | 1983-08-30 |
| 4400564 | Separation of monoolefins from diolefins | Marvin M. Johnson | 1983-08-23 |
| 4398052 | Separation of monoolefins from other monoolefins | Marvin M. Johnson | 1983-08-09 |
| 4394298 | Hydrogenation catalyst | Gerhard P. Nowack, Marvin M. Johnson | 1983-07-19 |
| 4348370 | Ammonia synthesis with catalyst derived by heating on a support a salt selected from alkali metal, alkaline earth metal, iron and cobalt hexacyanocobaltates and hexacyanoruthenates | Marvin M. Johnson, Gerhard P. Nowack | 1982-09-07 |
| 4309311 | Ammonia synthesis with catalyst derived by heating on a support a salt selected from alkali metal, alkaline earth metal, iron and cobalt hexacyanocobaltates and hexacyanoruthenates | Marvin M. Johnson, Gerhard P. Nowack | 1982-01-05 |
| 4287049 | Reclaiming used lubricating oils with ammonium salts and polyhydroxy compounds | Marvin M. Johnson | 1981-09-01 |
| 4265733 | De-ashing lubricating oils | Bobby G. Gray | 1981-05-05 |
| 4247389 | De-ashing lubricating oils | Marvin M. Johnson, Gerhard P. Nowack | 1981-01-27 |