Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795697 | Stabilization of ketazine dyes | Kim M. Vogel, David C. Weigel | 1989-01-03 |
| 4782010 | Photohermographic emulsions having stable color forming developers | David C. Weigel, Louis M. Leichter, Kristen A. Hoff | 1988-11-01 |
| 4775754 | Preparation of leuco dyes | Kim M. Vogel | 1988-10-04 |
| 4622395 | Phenoxazine and phenothiazine dyes and leuco forms thereof | Peter A. Bellus | 1986-11-11 |