Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 12006219 | Thermo-chemical processing of coal via solvent extraction | William SCHAFFERS, David BELL, John MYERS, Kaspars KRUTKRAMELIS | 2024-06-11 | |
| 6028211 | Composition and method for reducing fouling in process equipment used for manufacturing aromatic materials | Allen B. Mossman, David A. Young, Juergen K. Holzhauer | 2000-02-22 | $392,204,000 |
| 5770764 | Process for preparing purified aromatic polycarboxylic acids | Martin A. Zeitlin, David L. Sikkenga, Stephen V. Hoover | 1998-06-23 | $63,900,000 |
| 5350874 | Process for preparing diesters of naphthalenedicarboxylic acids | Juergen K. Holzhauer, Gregory P. Hussmann, David L. Sikkenga | 1994-09-27 | $128,626,000 |
| 5292934 | Method for preparing aromatic carboxylic acids | David L. Sikkenga, George E. Kuhlmann, Martin A. Zeitlin, Stephen V. Hoover | 1994-03-08 | $27,465,000 |
| 5262560 | Process for preparing purified dimethyl naphthalenedicarboxylate | Juergen K. Holzhauer, David A. Young, Martin A. Zeitlin | 1993-11-16 | $48,310,000 |