US3083422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous stopper rod
Assignee: Finkl A and Sons Co
•
Filing: 1959-04-13
•
Granted: 1963-04-02
•
Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Charles W Finkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:02
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/15; F27D3/1509; F27D3/1536; B; B22; B22D; B22D41/00; B22D41/14; B22D41/16; B22D41/18; B22D41/186
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF DEGASSING A BATCH OF MOLTEN METAL IN A LADLE HAVING A STOPPER ROD SEATED IN A DISCHARGE NOZZLE IN THE BOTTOM OF THE LADLE, SAID METHOD INCLUDING THE STEPS OF SUBJECTING THE SURFACE OF THE MOLTEN METAL TO A VACUUM SUFFICIENT TO DEGAS THE MOLTEN METAL, AND SIMULTANEOUSLY BUBBLING A SUFFICIENT VOLUE OF PURGING GAS HAVING LITTLE AFFINITY FOR THE MOLTEN METAL OUTWARDLY THROUGH A GAS POROUS MEMBER IN THE STOPPER ROD ADJACENT ITS LOWER END, SAID GAS POROUS MEMBER BEING SUFFICIENTLY POROUS TO PERMIT OUTWARD PASSAGE OF GAS THERETHROUGH WHILE RESISTING INWARD FLOW OF MOLTEN METAL, AND THENCE UPWARDLY THROUGH THE MOLTEN METAL TO THEREBY INDUCE A CIRCULATION WITHIN THE LADLE WHICH BRINGS SUBSTANTIALLY
Claim 2
Independent Claim
118 words
A METHOD OF DEGASSING A BATCH OF MOLTEN METAL IN A LADLE HAVING A STOPPER ROD SEATED IN A DISCHARGE NOZZLE IN THE BOTTOM OF THE LADLE, SAID METHOD INCLUDING THE STEPS OF SUBJECTING THE SURFACE OF THE MOLTEN METAL TO A VACUUM SUFFICIENT TO DEGAS THE MOLTEN METAL, AND SIMULTANEOUSLY BUBBLING A SUFFICIENT VOLUE OF PURGING GAS HAVING LITTLE AFFINITY FOR THE MOLTEN METAL OUTWARDLY THROUGH A GAS POROUS MEMBER IN THE STOPPER ROD ADJACENT ITS LOWER END, SAID GAS POROUS MEMBER BEING SUFFICIENTLY POROUS TO PERMIT OUTWARD PASSAGE OF GAS THERETHROUGH WHILE RESISTING INWARD FLOW OF MOLTEN METAL, AND THENCE UPWARDLY THROUGH THE MOLTEN METAL TO THEREBY INDUCE A CIRCULATION WITHIN THE LADLE WHICH BRINGS SUBSTANTIALLY
References Cited (Backward Citations)
US51397A
Cited
US1261509A
Cited
US2054923A
Cited
US2005311A
Cited
US2475777A
Cited
US2477838A
Cited
US2724160A
Cited
US2811346A
Cited
US2839292A
Cited
US2855293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |