Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4536185 | Liquid preparation of cationic dye mixture containing aliphatic carboxylic acid for black dyeing | Alex Nicopoulos | 1985-08-20 |
| 4508536 | Solid dye mixtures for dyeing polyacrylonitrile navy blue to black | Paul Erzinger | 1985-04-02 |