Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5245021 | 14-crown-4-ether derivatives | Thomas R. Welter | 1993-09-14 |
| 5188802 | Dry analytical element for lithium assay | James R. Schaeffer, Robert F. Winterkorn, Harold C. Warren, III, Thomas R. Welter | 1993-02-23 |
| 5132436 | Intermediates for making 14-crown-4-ether derivatives | Thomas R. Welter | 1992-07-21 |