Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5354904 | Sulfonamides derived from 1-hydroxy-6-aminonaphthalene-3-sulfonic acid (J acid) | Ulrike Schloesser | 1994-10-11 |
| 5347022 | Preparation of DI- or triarylmethane dyes by oxidation | Thomas Gessner | 1994-09-13 |
| 5338639 | Electrostatic toner containing a keto compound as a charge stabilizer | Gunter-Rudolf Schroeder | 1994-08-16 |
| 5286854 | Basic azo dyes with a coupling component of the hydroxynaphthalenecarboxylic acid series | Erwin Hahn, Heidi Hengelsberg | 1994-02-15 |