Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7363776 | Method for forming fused quartz using deuterium | Larry Qiang Zeng, Frederic F. Ahlgren, Anil Raj Duggal | 2008-04-29 |
| 6875515 | Fused quartz article having controlled devitrification | Thomas Francis McNulty, David Pender, Robert Arthur Giddings, Frederic F. Ahlgren | 2005-04-05 |
| 6799440 | Optical fiber deposition tube fused in deuterium atmosphere for attenuation improvement | Larry Qiang Zeng, Frederic F. Ahlgren, Anil Raj Duggal | 2004-10-05 |
| 6546754 | Apparatus for silica crucible manufacture | Richard L. Hansen, Fred D'Orazio, George Coleman | 2003-04-15 |
| 5900381 | Opaque silica composition | Matthew J. Curran, Frederic F. Ahlgren, Mohan Rajaram | 1999-05-04 |
| 5818577 | Detection method and apparatus for contamination in quartz sand | Steven Jude Duclos, Alok Mani Srivastava, Jacob Charles Borscheller, Russell Stephen DeMuth | 1998-10-06 |