Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6849242 | Porous silica granule, method for producing the same, and method for producing synthetic quartz glass powder using the porous silica granule | Rainer Koeppler, Klaus Arnold, Hiroshi Matsui, Kasumi Hoshikawa, Tsukasa Sakaguchi | 2005-02-01 |
| 5979186 | Method for the manufacture of SiO.sub.2 granular material | Rainer Köppler, Klaus Arnold | 1999-11-09 |