Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5273682 | Viscosity control additives for foaming mixtures | — | 1993-12-28 | $43,314,000 |
| 5000262 | Viscosity control additives for foaming mixtures | — | 1991-03-19 | |
| 4967837 | Steam enhanced oil recovery method using dialkyl aromatic sulfonates | — | 1990-11-06 | $40,952,000 |
| 4634519 | Process for removing naphthenic acids from petroleum distillates | — | 1987-01-06 | $32,845,000 |
| 4379773 | Process for wet spinning nylon 4 | J. Carpenter | 1983-04-12 | $32,111,000 |
| 4215211 | Polymerization of 2-pyrrolidone with CO.sub.2 /SO.sub.2 | — | 1980-07-29 | $36,604,000 |
| 4185961 | Polypyrrolidone fiber treatment | — | 1980-01-29 | $26,040,000 |