Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6799441 | Furnaces for fused silica production | Daniel R. Sempolinski, Merrill F. Sproul | 2004-10-05 |
| 6698248 | Methods and furnaces for fused silica production | Daniel R. Sempolinski, Merrill F. Sproul | 2004-03-02 |
| 6463761 | Method and apparatus for minimizing air infiltration in the production of fused silica glass | Mahendra K. Misra, Merrill F. Sproul | 2002-10-15 |
| 6314766 | Apparatus for minimizing air infiltration in the production of fused silica glass | Mahendra K. Misra, Merrill F. Sproul | 2001-11-13 |