US3384149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming hot top liners
Assignee: Foseco Trading AG
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Filing: 1965-12-06
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Granted: 1968-05-21
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Expires: 1985-12-06
Abstract
No abstract record available.
Inventors
- 👤 Eastwood Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:00
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10; B22D7/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
THE METHOD OF FORMING HEAT-INSULATING LINERS IN HOT TOP CASINGS FOR USE ON BIG-END-UP INGOT MOLDS, WHICH METHOD COMPRISES THE STEPS OF CONTINUALLY ADVANCING A PLURALITY OF THE HOT TOP CASINGS IN SERIATIM TO A FIXED LINING STATION, INSERTING A PERFORATED FORMING TOOL INTO EACH CASING ARRIVING AT THE FIXED LINING STATION SO AS TO FORM AN ANNULAR CAVITY BETWEEN THE INNER SURFACE OF THE CASING AND THE OUTER SURFACE OF THE FORMING TOOL, FEEDING A SLURRY COMPRISING A FINELY DIVIDED REFRACTORY MATERIAL, A FIBROUS MATERIAL, AND A LIQUID CARRIER INTO SAID CAVITY AND WITHDRAWING THE LIQUID CARRIER THROUGH THE INTERIOR OF THE PERFORATED FORMING TOOL SO AS TO BUILD UP A LAYER OF THE FIBROUS AND REFRACTORY MATERIALS IN SAID CAVITY, WITHDRAWING THE FORMING TOOL FROM THE CASING AND THE LAYER OF FIBROUS AND REFRACTORY MATERIALS SO THAT SAID LAYER FORMS A LINER ON THE INNER SURFACE OF THE CASING, CONTINUALLY ADVANCING EACH CASING AWAY FROM THE LINING STATION AND DRYING THE LINER THEREIN SUFFICIENTLY TO PERMIT THE CASTING OF MOLTEN METAL IN THE LINED CASING, AND MOUNTING EACH CASING WITH ITS DRY LINER ON A BIG-END-UP INGOT MOLD FOR THE NEXT CASTING OPERATION.
Claim 2
Independent Claim
195 words
THE METHOD OF FORMING HEAT-INSULATING LINERS IN HOT TOP CASINGS FOR USE ON BIG-END-UP INGOT MOLDS, WHICH METHOD COMPRISES THE STEPS OF CONTINUALLY ADVANCING A PLURALITY OF THE HOT TOP CASINGS IN SERIATIM TO A FIXED LINING STATION, INSERTING A PERFORATED FORMING TOOL INTO EACH CASING ARRIVING AT THE FIXED LINING STATION SO AS TO FORM AN ANNULAR CAVITY BETWEEN THE INNER SURFACE OF THE CASING AND THE OUTER SURFACE OF THE FORMING TOOL, FEEDING A SLURRY COMPRISING A FINELY DIVIDED REFRACTORY MATERIAL, A FIBROUS MATERIAL, AND A LIQUID CARRIER INTO SAID CAVITY AND WITHDRAWING THE LIQUID CARRIER THROUGH THE INTERIOR OF THE PERFORATED FORMING TOOL SO AS TO BUILD UP A LAYER OF THE FIBROUS AND REFRACTORY MATERIALS IN SAID CAVITY, WITHDRAWING THE FORMING TOOL FROM THE CASING AND THE LAYER OF FIBROUS AND REFRACTORY MATERIALS SO THAT SAID LAYER FORMS A LINER ON THE INNER SURFACE OF THE CASING, CONTINUALLY ADVANCING EACH CASING AWAY FROM THE LINING STATION AND DRYING THE LINER THEREIN SUFFICIENTLY TO PERMIT THE CASTING OF MOLTEN METAL IN THE LINED CASING, AND MOUNTING EACH CASING WITH ITS DRY LINER ON A BIG-END-UP INGOT MOLD FOR THE NEXT CASTING OPERATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |