Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5917035 | Oxazine dyes, their preparation and the use thereof | Hanspeter Birri, Gerhard Hanika | 1999-06-29 |
| 5284939 | Process for the preparation of highly concentrated solutions of cationic azo dyes | Hanspeter Birri, Gerhard Hanika | 1994-02-08 |
| 4777266 | Process for the preparation of anthraquinoid disperse dyes and mixtures thereof | Pavel Haspra | 1988-10-11 |
| 4536185 | Liquid preparation of cationic dye mixture containing aliphatic carboxylic acid for black dyeing | Arnulf Ruediger Lapple | 1985-08-20 |