Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5728870 | Process for preparing purified 2,6-naphthalenedicarboxylic acid | Juergen K. Holzhauer, Stephen V. Hoover, David L. Sikkenga | 1998-03-17 |
| 5629446 | Process for preparing purified 2,6-naphthalenedicarboxylic acid | Juergen K. Holzhauer, Stephen V. Hoover, David L. Sikkenga | 1997-05-13 |
| 5563294 | Process for preparing purified 2,6-naphthalenedicarboxylic acid | Juergen K. Holzhauer, Stephen V. Hoover, David L. Sikkenga | 1996-10-08 |
| 4933491 | Method for purifying a crude naphthalene dicarboxylic acid | Stephen J. Pietsch, Juergen K. Holzhauer, Hobe Schroeder | 1990-06-12 |