Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5004495 | Method for producing ultra clean steel | — | 1991-04-02 |
| 4991752 | Method and apparatus for stirring and pouring molten metal in a neutral atmosphere | — | 1991-02-12 |
| 4858894 | Stirring block with unidirectional grain structure having improved erosion resistance | — | 1989-08-22 |
| 4854553 | Self shielding lance | — | 1989-08-08 |
| 4840354 | Stirring brick with shaped gas volume control openings | — | 1989-06-20 |
| 4840355 | Slag controlling device for basic oxygen furnaces | — | 1989-06-20 |
| 4744544 | Refractory erosion visual indicator | Joseph A. Perri, Jeffrey Towns | 1988-05-17 |
| 4740241 | Dual action lance for ladles | — | 1988-04-26 |
| 4725047 | Device for introducing gas into molten metal | — | 1988-02-16 |
| 4709748 | Protective sleeve for the shroud of a hot metal ladle | — | 1987-12-01 |
| 4709903 | Slag retaining device for use in converters, ladles, or the like | — | 1987-12-01 |
| 4640498 | Horizontally and vertically movable elevated apparatus for placing slag retaining means in tapping converters | Joseph A. Perri | 1987-02-03 |
| 4624292 | Method and apparatus for pouring molten metal in a neutral atmosphere | — | 1986-11-25 |
| 4586956 | Method and agents for producing clean steel | — | 1986-05-06 |
| 4573668 | Slag and hot metal runner systems | — | 1986-03-04 |
| 4538670 | Method and apparatus for pouring molten metal in a neutral atmosphere | — | 1985-09-03 |
| 4494734 | Slag retaining device for use during tapping of converters and method | Michael D. LeBate, II | 1985-01-22 |
| 4481809 | Method and apparatus for monitoring erosion in gas stirring devices in molten metal ladles | — | 1984-11-13 |
| 4471950 | Expandable, consumable stopper plug for steel making and handling vessels | — | 1984-09-18 |
| 4468013 | Device for placing slag retention devices in tapping converters | — | 1984-08-28 |
| 4462834 | Ladle covering compound | — | 1984-07-31 |
| 4441700 | Blast furnace trough and liner combination | — | 1984-04-10 |
| 4440534 | Ceramic insert | — | 1984-04-03 |
| 4396179 | Device for introducing gas into molten metal | — | 1983-08-02 |
| 4391434 | Ceramic insert | — | 1983-07-05 |