Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11661671 | Technique for controlling temperature uniformity in crystal growth apparatus | Cody Riopel, Hui Zhang | 2023-05-30 |
| 10633759 | Technique for controlling temperature uniformity in crystal growth apparatus | Cody Riopel, Hui Zhang | 2020-04-28 |
| 9546434 | High-temperature process improvements using helium under regulated pressure | David B. Joyce, John Brouillette, Daniel P. Betty, Ryan Philpott | 2017-01-17 |
| 8329133 | Method and apparatus for refining metallurgical grade silicon to produce solar grade silicon | David B. Joyce | 2012-12-11 |
| 8177910 | System and method for crystal growing | Chandra P. Khattak, David B. Joyce | 2012-05-15 |
| 7918936 | System and method for crystal growing | Chandra P. Khattak, David B. Joyce | 2011-04-05 |
| 7344596 | System and method for crystal growing | Chandra P. Khattak, David B. Joyce | 2008-03-18 |
| 6418921 | Method and apparatus for cutting workpieces | Maynard B. Smith, Chandra P. Khattak | 2002-07-16 |
| 6368403 | Method and apparatus for purifying silicon | Chandra P. Khattak, David B. Joyce | 2002-04-09 |
| 5972107 | Method for purifying silicon | Chandra P. Khattak | 1999-10-26 |
| 5842462 | Method and apparatus to produce a radial cut profile | Maynard B. Smith | 1998-12-01 |
| 5438973 | Shaped blades | Maynard B. Smith, Chandra P. Khattak | 1995-08-08 |
| 5394825 | Method and apparatus for growing shaped crystals | Chandra P. Khattak, Vladimir Gorbulev | 1995-03-07 |
| 4840699 | Gallium arsenide crystal growth | Chandra P. Khattak, Vernon White, John H. Wohlgemuth | 1989-06-20 |
| 4727852 | Multi-wafer slicing with a fixed abrasive | Chandra P. Khattak, Maynard B. Smith | 1988-03-01 |
| 4646710 | Multi-wafer slicing with a fixed abrasive | Chandra P. Khattak, Maynard B. Smith | 1987-03-03 |
| 4447085 | Grapple assembly | — | 1984-05-08 |
| 4384564 | Process of forming a plated wirepack with abrasive particles only in the cutting surface with a controlled kerf | Maynard B. Smith, Chandra P. Khattak | 1983-05-24 |
| 4349178 | Wire blades | — | 1982-09-14 |
| 4287869 | Charging system for cutting blade | — | 1981-09-08 |
| 4256079 | Wire blades | — | 1981-03-17 |
| 4256530 | Crystal growing | Chandra P. Khattak | 1981-03-17 |
| 4218418 | Processes of casting an ingot and making a silica container | Chandra P. Khattak | 1980-08-19 |
| 4187828 | Cutting | — | 1980-02-12 |