Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565581 | Nacreous pigments having improved light fastness, their preparation and use | — | 1986-01-21 |
| 4537636 | Process for the preparation of nacreous pigments with improved gloss properties, products thereof, and compositions using said pigments | Reiner Esselborn | 1985-08-27 |
| 4509988 | Nacreous pigments having improved light fastness, their preparation and use | — | 1985-04-09 |
| 4494993 | Nacreous pigments, their preparation and use | Reiner Esselborn | 1985-01-22 |
| 4490179 | Process for rendering nacreous pigments hydrophobic | — | 1984-12-25 |
| 4457784 | Green nacreous pigments having calcined Cr oxide and phosphate layer, their preparation, and use | — | 1984-07-03 |
| 4456486 | Yellow nacreous pigments having calcined CR oxide and phosphate layer for improved light-fastness, process and use | — | 1984-06-26 |
| 4323554 | Preparation and use of improved pearlescent pigments of high light fastness | — | 1982-04-06 |
| 4206421 | Arrangement for synchronizing a free-swinging oscillator | Helmut Junghans, Gerd Ortkrass, Klaus Vogel | 1980-06-03 |