Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5112452 | Removal of thiosulfate from hydrosulfite solutions | John L. Stubbs, Everett F. Hauser, Jr. | 1992-05-12 |
| 5006327 | Alkali metal hydrosulfite solutions | Jimmy M. French | 1991-04-09 |
| 4992147 | Electrochemical process for producing hydrosulfite solutions | David W. Cawlfield, Jimmy M. French | 1991-02-12 |
| 4892636 | Modular electrolytic cell and processing apparatus | David W. Cawlfield, Kenneth E. Woodard, Jr. | 1990-01-09 |
| 4810483 | Process for producing anhydrous alkali metal hydrosulfites | David W. Cawlfield, Joan A. Mabesoone | 1989-03-07 |
| 4793906 | Electrochemical process for producing hydrosulfite solutions | David W. Cawlfield, Jimmy M. French | 1988-12-27 |