Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839404 | Bituminous compositions having high adhesive properties | David L. Wolfe | 1989-06-13 |
| 4786329 | Asphalt compositions containing anti-stripping additives prepared from amines or polyamines and phosphonates | Druce K. Crump | 1988-11-22 |
| 4765873 | Continuous process for the removal of hydrogen sulfide from a gaseous stream | Michael C. McGaugh | 1988-08-23 |
| 4765839 | Bituminous compositions containing anti-stripping additives prepared from amines and substituted heterocyclic compounds | Duane S. Treybig | 1988-08-23 |
| 4765969 | Continuous process for scrubbing hydrogen sulfide to produce elemental sulfur | Michael C. McGaugh | 1988-08-23 |
| 4724003 | Asphalt compositions containing anti-stripping additives prepared from hydrocarbyl substituted nitrogen-containing aromatic heterocyclic compounds, aldehydes or ketones and amines | Duane S. Treybig | 1988-02-09 |
| 4701484 | Asphalt compositions containing anti-stripping additives prepared from amines or polyamines and aldehydes | Duane S. Treybig | 1987-10-20 |
| 4643886 | Automatic pH control in a process for removal of hydrogen sulfide from a gas | Stephen A. Bedell | 1987-02-17 |