Issued Patents All Time
Showing 51–75 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990191 | Aminated sulfonated or sulfomethylated lignins as cement fluid loss control additives | — | 1991-02-05 |
| 4976784 | Cationic slurry seal emulsifiers | — | 1990-12-11 |
| 4957560 | Cationic aqueous bituminous emulsion-aggregate slurries | — | 1990-09-18 |
| 4944804 | Plaster of Paris (Stucco) as mixing aid for aqueous bituminous emulsion aggregate slurries | — | 1990-07-31 |
| 4926944 | Lignin-based cement fluid loss control additive | — | 1990-05-22 |
| 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 |
| 4789523 | Cationic and anionic lignin amines corrosion inhibitors | Patti E. Brown | 1988-12-06 |
| 4787960 | Cationic and anionic lignin amine sizing agents | Patti E. Brown | 1988-11-29 |
| 4786720 | Sulfomethylated lignin amines | — | 1988-11-22 |
| 4781840 | Cationic and anionic lignin amines as flocculants | Patti E. Brown | 1988-11-01 |
| 4775744 | Cationic and anionic lignin amines | Patti E. Brown | 1988-10-04 |
| 4676927 | Rapid and medium setting high float bituminous emulsions | Hans G. Schreuders | 1987-06-30 |
| 4658036 | Invert emulsifiers for oil-base drilling muds | — | 1987-04-14 |
| 4614600 | Corrosion inhibitors | David V. Braddon | 1986-09-30 |
| 4597799 | Cationic bituminous emulsions and emulsion aggregate slurries | — | 1986-07-01 |
| 4561901 | Emulsifiers for bituminous emulsions | — | 1985-12-31 |
| 4547224 | Emulsifiers for bituminous emulsions | — | 1985-10-15 |
| 4494992 | Amphoterics as emulsifiers for bituminous emulsions | Hans G. Schreuders | 1985-01-22 |
| 4478642 | Amphoterics as emulsifiers for bituminous emulsions | Hans G. Schreuders | 1984-10-23 |
| 4464285 | Amphoterics as emulsifiers for bituminous emulsions | — | 1984-08-07 |