Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5968261 | Method for growing large silicon carbide single crystals | Donovan L. Barrett, Richard H. Hopkins | 1999-10-19 |
| 5746827 | Method of producing large diameter silicon carbide crystals | Donovan L. Barrett, Richard N. Thomas, Richard H. Hopkins | 1998-05-05 |
| 5683507 | Apparatus for growing large silicon carbide single crystals | Donovan L. Barrett, Richard H. Hopkins | 1997-11-04 |
| 5229082 | Melt replenishment system for dendritic web growth | Richard J. Ravas, George V. B. Hall, James P. McHugh, Frank L. Przywarty, Lynd R. McCormick | 1993-07-20 |
| 5098287 | Lid for improved dendritic web growth | Charles S. Duncan, Edgar L. Kochka, Paul A. Piotrowski | 1992-03-24 |
| 4971650 | Method of inhibiting dislocation generation in silicon dendritic webs | John A. Spitznagel, James P. McHugh | 1990-11-20 |
| 4919901 | Barrier design for crucibles for silicon dendritic web growth | Edgar L. Kochka, Charles S. Duncan | 1990-04-24 |
| 4786479 | Apparatus for dendritic web growth systems | Rolv Hundal, James P. McHugh | 1988-11-22 |
| 4751059 | Apparatus for growing dendritic web crystals of constant width | James P. McHugh, Charles S. Duncan | 1988-06-14 |