US3203689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory-lined tundishes
Assignee: SPS Technologies LLC
•
Filing: 1962-05-10
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Granted: 1965-08-31
•
Expires: 1982-05-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard Thomas Hallowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:55
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A TUNDISH COMPRISING A RIGID METALLIC OUTER CASING HAVING UPWARDLY EXTENDING SIDES AND A FLAT BOTTOM PORTION, SAID CASING BEING CAPABLE OF SUPPORTING THE WEIGHT OF THE TUNDISH TOGETHER WITH A CHARGE OF MOLTEN METAL, A LAYER OF HEAT INSULATING MATERIAL WITHIN SAID OUTER CASING, AN INNER MONOLITHIC LINING FOR SAID TUNDISH FORMED FROM A HIGH STRENGTH REFRACTORY MATERIAL, SAID LINING FORMING A STRUCTURALLY SELF-SUSTAINING SHELL REMOVABLE AS A UNIT, SAID INNER LINING, SAID HEAT INSULATING MATERIAL AND SAID OUTER CASING EACH BEING PROVIDED WITH ALIGNED APERTURES LOCATED IN THE BOTTOM PORTION OF THE TURNDISH, AND A NOZZLE INSERTED IN AND PROJECTING THROUGH SAID ALIGNED APERTURES.
Claim 2
Dependent Claim
106 words
A TUNDISH COMPRISING A RIGID METALLIC OUTER CASING HAVING UPWARDLY EXTENDING SIDES AND A FLAT BOTTOM PORTION, SAID CASING BEING CAPABLE OF SUPPORTING THE WEIGHT OF THE TUNDISH TOGETHER WITH A CHARGE OF MOLTEN METAL, A LAYER OF HEAT INSULATING MATERIAL WITHIN SAID OUTER CASING, AN INNER MONOLITHIC LINING FOR SAID TUNDISH FORMED FROM A HIGH STRENGTH REFRACTORY MATERIAL, SAID LINING FORMING A STRUCTURALLY SELF-SUSTAINING SHELL REMOVABLE AS A UNIT, SAID INNER LINING, SAID HEAT INSULATING MATERIAL AND SAID OUTER CASING EACH BEING PROVIDED WITH ALIGNED APERTURES LOCATED IN THE BOTTOM PORTION OF THE TURNDISH, AND A NOZZLE INSERTED IN AND PROJECTING THROUGH SAID ALIGNED APERTURES.
References Cited (Backward Citations)
US2438559A
Cited
US2650255A
Cited
US2871008A
Cited
US2826793A
Cited
US3028642A
Cited
US2961722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |