Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6086846 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wilfried Burow, Wolfgang Oehlert, Heribert Bade | 2000-07-11 |
| 6053972 | Non-silking iron oxide yellow pigments with high color density | Rolf Naumann, Rolf Braun | 2000-04-25 |
| 5885545 | Highly transparent, yellow iron oxide pigments, process for the production thereof and use thereof | — | 1999-03-23 |
| 5879441 | Very highly transparent yellow iron oxide pigments, a process for their production and their use | — | 1999-03-09 |
| 5837216 | Use of synthetic, iron raw materials for preparing iron oxide pigments | Wilfried Burow, Wolfgang Oehlert, Heribert Bade | 1998-11-17 |
| 5614012 | Highly transparent, red iron oxide pigments, process for the production thereof and use thereof | — | 1997-03-25 |
| 5368640 | Transparent iron oxide pigments, processes for their production and their use | Klaus Lerch, Gunter Buxbaum | 1994-11-29 |
| 5066473 | Silicon nitride powders of low isoelectric point and processes for their production | Gerhard Franz, Benno Laubach | 1991-11-19 |
| 5030434 | Silicon nitride powders with improved surface properties and processes for their preparation | Gerhard Franz, Benno Laubach | 1991-07-09 |
| 4983371 | Silicon nitride powder of low oxygen content | Benno Laubach, Gerhard Franz | 1991-01-08 |