Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6177136 | Process for coating substrates with a silicium-containing layer | Hans-Peter Baldus, Gerd Passing, Rolf Meistring, Hannelore Benien, Marc Haltrich | 2001-01-23 |
| 5746969 | Process for the production of dense silicon nitride materials | Gerhard Leimer, Stefan Roth | 1998-05-05 |
| 5439964 | Thermoplastic molding compounds for the production of inorganic sintered moldings and a process for the production of inorganic sintered moldings | Holger Ohst, Stefan Roth | 1995-08-08 |
| 5283213 | Moulding compounds for the production of inorganic sintered mouldings and a process for the production of inorganic sintered mouldings | Holger Ohst, Rolf Dhein | 1994-02-01 |
| 5075091 | Process for the preparation of silicon nitride | Gerhard Franz | 1991-12-24 |
| 4798714 | Process for the preparation of silicon nitride low in carbon content | Gerhard Franz | 1989-01-17 |
| 4676838 | Lamellar iron oxide pigments, a process for the production thereof and the use thereof | Gerhard Franz, Heinrich Heine | 1987-06-30 |