Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6482950 | Squarylium compounds, and processes and intermediates for the synthesis of these compounds | John Lee, John Marshall, Donald A. McGowan, Anthony J. Puttick, Thomas K. Spencer +3 more | 2002-11-19 |
| 5919950 | Squarylium compounds, and processes and intermediates for the synthesis of these compounds | John Lee, John Marshall, Donald A. McGowan, Anthony J. Puttick, Thomas K. Spencer +3 more | 1999-07-06 |
| 5231190 | Squarylium compounds, and processes and intermediates for the synthesis of these compounds | Donald A. McGowan, John Lee, Thomas K. Spencer, Stephen J. Telfer, Michael J. Zuraw | 1993-07-27 |