Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6623914 | Method for preparing an acid salt of p-phenylenediamine-type photographic color developers | Lucian Boldea | 2003-09-23 |
| 6551767 | Process for preparing p-phenylenediamine color developers in a concentrated free-base form | Renee Ellen Niziurski-Mann, Lucian Boldea, Michael Wayne Salyer | 2003-04-22 |
| 6548235 | Stabilized solution of an alkali metal or alkaline earth metal salt of p-phenylenediamine color developer and method of making same | — | 2003-04-15 |