Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4744882 | Polycondensates of sulfonated coal tar fractions | Marvin D. Camp, Jr. | 1988-05-17 |
| 4654152 | Base mix fabric softener | Irshad Khan | 1987-03-31 |
| 4604184 | Modified coal-tar pitch | Henry A. F. L. Kremer | 1986-08-05 |
| 4517072 | Process for modifying coal tar materials | Henry A. F. L. Kremer | 1985-05-14 |
| 4469585 | Oxidation resistant pitches | Henry A. F. L. Kremer | 1984-09-04 |
| 4395326 | Treatment of coal tar emulsions | — | 1983-07-26 |
| 4213867 | Fabric conditioning compositions | Irshad Khan | 1980-07-22 |