Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5750392 | Composition for reducing the amount of and preventing the formation of hydrogen sulfide in an aqueous system, particularly in an aqueous system used in oil field applications | Donald O. Hitzman, Kenneth A. Sandbeck | 1998-05-12 |
| 5405531 | Method for reducing the amount of and preventing the formation of hydrogen sulfide in an aqueous system | Donald O. Hitzman, Kenneth A. Sandbeck | 1995-04-11 |
| 5250483 | Method for treatment of catalysts using denitrifying bacteria | Donald O. Hitzman | 1993-10-05 |
| 5204261 | Catalase-negative Pichia pastoris | William D. Prevatt | 1993-04-20 |
| 5044435 | Enhanced oil recovery using denitrifying microorganisms | Penny L. Sperl | 1991-09-03 |
| 4879231 | Transformation of yeasts of the genus pichia | David W. Stroman, James M. Cregg, Michael M. Harpold | 1989-11-07 |
| 4818700 | Pichia pastoris argininosuccinate lyase gene and uses thereof | James M. Cregg | 1989-04-04 |
| 4795708 | Novel backteria and single cell protein production therewith | John A. Cruze | 1989-01-03 |