Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5312471 | Method and apparatus for the manufacture of large optical grade SiO.sub.2 glass preforms | — | 1994-05-17 |
| 4882043 | Combination roll-type magnetic and electrostatic separator and method | — | 1989-11-21 |
| 4818510 | Modified close fraction batch process for purification of SiO.sub.2 | — | 1989-04-04 |
| 4670222 | Leaching apparatus | — | 1987-06-02 |
| 4576622 | Manufacture of preforms for energy transmitting fibers | — | 1986-03-18 |
| 4389235 | Burner for manufacture of fused quartz or fused silica ingots | — | 1983-06-21 |
| 4212661 | Method for the manufacture of hollow fused quartz or fused silica ingots | — | 1980-07-15 |
| 4188201 | Apparatus for forming an ingot in a rotating housing | — | 1980-02-12 |