Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877457 | Cationic aqueous bituminous emulsion-aggregate slurries preparation | Hans G. Schreuders | 1989-10-31 |
| 4861377 | Cationic aqueous bituminous emulsion-aggregate slurries | — | 1989-08-29 |
| 4859245 | Viscosifiers for asphalt emulsions | Hans G. Schreuders | 1989-08-22 |
| 4859362 | Sulfomethylated lignin amines | — | 1989-08-22 |
| 4810299 | Cationic aqueous bituminous emulsion-aggregate slurries | Hans G. Schreuders | 1989-03-07 |
| 4806166 | Tall oil based amino esters as anti-stripping agents for asphalt | Hans G. Schreuders | 1989-02-21 |