Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12384712 | Systems and method for producing hollow quartz cylinders | Eugene Anthony Pruss, Frederic F. Ahlgren, Douglas Korwin, Michael Plate | 2025-08-12 |
| 9139932 | Quartz glass crucible and method for treating surface of quartz glass crucible | Richard L. Hansen, Narsi Devanathan | 2015-09-22 |
| 7846405 | Method and apparatus for measuring and controlling selective catalytic reduction (SCR) emission control systems | William Lanier, Frederic F. Ahlgren | 2010-12-07 |
| 7452518 | Process for treating synthetic silica powder and synthetic silica powder treated thereof | Richard L. Hansen, Douglas Korwin | 2008-11-18 |