US3458169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot top for big-end-up ingot molds and method of assembling same
Assignee: Foseco International Ltd
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Filing: 1964-08-14
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Granted: 1969-07-29
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Expires: 1984-08-14
Abstract
No abstract record available.
Inventors
- 👤 Fred Eastwood
- 👤 John Harry Brindle
- 👤 Frederick L Kolb Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:19
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B22; B22D; B22D7/00; B22D7/06; B22D7/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T29/49945
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A LOW VOLUME, RAPID TURN-AROUND HOT TOP ESPECIALLY ADAPTED FOR USE WITH A BIG-END-UP INGOT MOLD HAVING A TOP OPENING OF A PREDETERMINED CROSS-SECTIONAL AREA COMPRISING, IN COMBINATION, A METAL CASING ADAPTED TO BE MOUNTED ON THE TOP OF A BIG-END-UP MOLD, THE INSIDE SURFACE OF SAID METAL CASING BEING INCLINED DOWNWARDLY AND OUTWARDLY TO PROVIDE A GRADUALLY INCREASING HOT TOP OPENING, A REFRACTORY BOTTOM RING SECURED TO THE LOWER END OF SAID METAL CASING WITH THE INSIDE SURFACE OF SAID RING BEING SUBSTANTIALLY FLUSH WITH THE INSIDE SURFACE OF SAID METAL CASING AND TAPERED AT THE SAME ANGLE, AND AN EXPANDABLE, HIGHLY INSULATING REFRACTORY LINER COMPRISING A PLURALITY OF PREFORMED REFRACTORY BOARDS FITTED WITHIN SAID METAL CASING IN BEARING ENGAGMENT WITH THE INCLINED SURFACES OF OF, THE LOWER PORTIONS OF SAID BOARDS EXTENDING DOWNWARDLY IN BEARING ENGAGEMENT WITH THE INNER SURFACES OF SAID BOTTOM RING TO SUBSTANTIALLY PREVENT THE SPREAD OF MOLTEN METAL UPWARDLY THEREBETWEEN.
Claim 2
Dependent Claim
156 words
A LOW VOLUME, RAPID TURN-AROUND HOT TOP ESPECIALLY ADAPTED FOR USE WITH A BIG-END-UP INGOT MOLD HAVING A TOP OPENING OF A PREDETERMINED CROSS-SECTIONAL AREA COMPRISING, IN COMBINATION, A METAL CASING ADAPTED TO BE MOUNTED ON THE TOP OF A BIG-END-UP MOLD, THE INSIDE SURFACE OF SAID METAL CASING BEING INCLINED DOWNWARDLY AND OUTWARDLY TO PROVIDE A GRADUALLY INCREASING HOT TOP OPENING, A REFRACTORY BOTTOM RING SECURED TO THE LOWER END OF SAID METAL CASING WITH THE INSIDE SURFACE OF SAID RING BEING SUBSTANTIALLY FLUSH WITH THE INSIDE SURFACE OF SAID METAL CASING AND TAPERED AT THE SAME ANGLE, AND AN EXPANDABLE, HIGHLY INSULATING REFRACTORY LINER COMPRISING A PLURALITY OF PREFORMED REFRACTORY BOARDS FITTED WITHIN SAID METAL CASING IN BEARING ENGAGMENT WITH THE INCLINED SURFACES OF OF, THE LOWER PORTIONS OF SAID BOARDS EXTENDING DOWNWARDLY IN BEARING ENGAGEMENT WITH THE INNER SURFACES OF SAID BOTTOM RING TO SUBSTANTIALLY PREVENT THE SPREAD OF MOLTEN METAL UPWARDLY THEREBETWEEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |