Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6270566 | Process for colouring building materials | Gunther Teichmann | 2001-08-07 |
| 5108508 | Rutile mixed phase pigment microgranulates, a process for their preparation and their use | Hans-Ulrich Hofs, Dieter Rade | 1992-04-28 |
| 5061473 | Titanium dioxide, a process and its production | René de Cleyn, Peter Thometzek | 1991-10-29 |
| 5032377 | Chromium oxide green, a process for its production and its use | Hans-Ulrich Hofs | 1991-07-16 |
| 5013365 | Iron oxide black pigments, processes for their preparation and their use | Wolfgang Bockelmann, Wilfried Burow, Kurt Schafer | 1991-05-07 |
| 5009879 | Titanium dioxide, a process for its production and its use | René de Cleyn, Peter Thometzek | 1991-04-23 |
| 5002609 | Iron oxide black pigment granules, processes for their preparation and their use | Wolfgang Bockelmann, Klaus Gauler | 1991-03-26 |
| 4985078 | Thermostable zinc ferrite color pigments containing 0.05-0.5 wt % lithium, a process for their preparation and their use | Volker Wilhelm, Siegfried Keifer, Wilfried Burow | 1991-01-15 |
| 4985073 | Needle shaped alloy powders based on iron and their use | Rolf Naumann, Fritz Rodi | 1991-01-15 |
| 4957562 | Chrome oxide green, a process for its preparation and its use | Dieter Rade, Hans-Ulrich Hofs, Gunther Teichmann, Gerhard Trenczek | 1990-09-18 |
| 4921542 | Finely divided iron oxide black pigments, a process for their preparation and their use | Karl-Werner Ganter, Wolfgang Rambold, Gunter Linde | 1990-05-01 |
| 4919726 | Process for the production of rutile mixed-phase pigments | Volker Wilhelm | 1990-04-24 |
| 4917735 | Process for the production of rutile mixed-phase pigments | Hans-Peter Heisse | 1990-04-17 |
| 4781580 | Indirectly heated rotary tubular kiln | Helmut Janz, Fritz Rodi, Alfred Soppe | 1988-11-01 |
| 4689086 | Stabilized magnetic pigments | Rolf Naumann, Gunter Buxbaum, Fritz Rodi, Karl Waid | 1987-08-25 |
| 4681637 | Process for the production of yellow-brown zinc ferrite pigments | Karlheinz Turban, Gerhard Franz, Werner Fuhr, Bernd Holle | 1987-07-21 |
| 4631090 | Preparation and use of iron magnetic pigments | Rolf Naumann, Lutz Leitner, Gunter Buxbaum | 1986-12-23 |
| 4631089 | Color-intensive iron oxide black pigments and process for their production | Rolf Naumann, Gunther Teichmann | 1986-12-23 |
| 4629500 | Use of novel rotary tubular kiln | Helmut Janz, Fritz Rodi, Alfred Soppe | 1986-12-16 |
| 4470844 | Agglomerated ferromagnetic iron particles | Rolf Naumann, Hans-Peter Biermann, Gunter Buxbaum, Wolfgang Rambold | 1984-09-11 |
| 4355006 | Process for the oxidative dissociation of chrome-containing ores | Ingo Pflugmacher | 1982-10-19 |
| 4235861 | Production of iron oxide pigments and sodium sulphate | Ingo Pflugmacher | 1980-11-25 |