Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5443607 | Process for the production of a homogeneous ream-free body made of quartz glass | Wolfgang Englisch, Heinrich Goy, Paul Sauerwein, Peter Hitzschke, Rolf Takke +1 more | 1995-08-22 |
| 4956059 | Process for the purification of granular silicon dioxide | Wolfgang Englisch, Helmut Leber, Klaus Reimann | 1990-09-11 |
| 4842628 | Method of verifying a porous article made out of glass soot and furnace for carrying out the method | Karl Kreutzer, Anton Steinkohl, Wolfgang Englisch | 1989-06-27 |
| 4676814 | Method for the continuous building of a hollow cylindrical soot body having no internal support | Dieter Ross, Hans-Ulrich Bonewitz, Uwe Christiansen, Karl-Friedrich Klein, Albert Muhlich +4 more | 1987-06-30 |
| 4666495 | Apparatus for manufacturing stria-free, bubble-free and homogeneous quartz-glass plates | Karl Kreutzer | 1987-05-19 |
| 4612023 | Method of manufacturing stria-free, bubble-free and homogeneous quartz-glass plates | Karl Kreutzer | 1986-09-16 |
| 4475204 | Method and apparatus for the production of flat, transparent vitreous silica slabs of low bubble content | Lutz Brandt, Karl Kreutzer, Karlheinz Rau, Horst Schmidt | 1984-10-02 |
| 4466700 | Lightweight mirror especially for astronomical purposes | Uwe Christiansen, Karlheinz Rau | 1984-08-21 |
| 4377405 | Method for the production of flat, transparent vitreous silica slabs of low bubble content | Lutz Brandt, Karl Kreutzer, Karlheinz Rau, Horst Schmidt | 1983-03-22 |
| RE30883 | Method of producing synthetic quartz glass | Karlheinz Rau, Albert Muhlich, Norbert Treber | 1982-03-16 |
| 4235615 | Method for the production of semiproduct for the production of light conducting fibers | Karlheinz Rau, Albert Muhlich, Norbert Treber | 1980-11-25 |