Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7637307 | Adjustable feed chute and associated method of feeding and melting | David O. Warren | 2009-12-29 |
| 7503376 | Method and apparatus for melting titanium using a combination of plasma torches and direct arc electrodes | David O. Warren | 2009-03-17 |
| 7470305 | Method and apparatus for alternating pouring from common hearth in plasma furnace | David O. Warren | 2008-12-30 |
| 7343340 | System and method for distributing transformer capacity among transformer users | Mark Haas, Donald M. Kopf, Mark Casper | 2008-03-11 |
| 7137436 | Method and apparatus for melting titanium using a combination of plasma torches and direct arc electrodes | David O. Warren | 2006-11-21 |
| 6904955 | Method and apparatus for alternating pouring from common hearth in plasma furnace | David O. Warren | 2005-06-14 |
| 6893607 | Elevated discharge gas lift bubble pump and furnace for use therewith | Larry D. Areaux | 2005-05-17 |
| 6868896 | Method and apparatus for melting titanium using a combination of plasma torches and direct arc electrodes | David O. Warren | 2005-03-22 |
| 6712875 | Method and apparatus for optimized mixing in a common hearth in plasma furnace | David O. Warren | 2004-03-30 |
| 4921533 | Ferro-aluminum composite pig | — | 1990-05-01 |