Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5030244 | Preparation of granules of dyes, optical whiteners or photoactivators from an aqueous suspension of naphthalene sulfonic acid-formaldehyde condensate dispersant | Angelika Hayer, Wolfgang Rehmann, Horst Olaf Brücker | 1991-07-09 |
| 4397652 | Process for the production of negligibly dusty preparations of dyes and optical brighteners | — | 1983-08-09 |
| 4326982 | Process for the manufacture of fine-crystalline fluorescent brighteners of the bis-triazinylaminostilbene series in the .beta.-crystal form | Ernst Schenkenberger | 1982-04-27 |
| 4295851 | Process for the production of negligibly dusty preparation | Ernst Schenkenberger, Friedrich Resch | 1981-10-20 |