Patent US3221382A successfully refreshed from Google Patents.
US3221382A
Expired / Lapsed
US
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Method of making a hot top
Assignee: Individual
•
Filing: 1964-05-28
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Granted: 1965-12-07
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Sherwood G Haw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:01
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/06; B22D7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD OF PROVIDING A PREFORMED LINER FOR A HOT TOP FOR AN INGOT MOLD COMPRISING THE STEPS OF (A) POURING A WATERLESS MIXTURE OF REFRACTORY MATERIAL WITH THERMOSETTING BINDER INTO A FIRST TUBULAR MOLD TO FORM AN OUTER VERTICAL TUBULAR SLEEVE, (B) POURING A WATERLESS MIXTURE OF EXOTHERMIC MATERIAL WITH THERMOSETTING BINDER INTO A SECOND TUBULAR MOLD WITHIN THE FIRST TUBULAR MOLD FOR THE REFRACTORY MATERIAL TO FORM AN INNER VERTICAL TUBULAR SLEEVE, (C) POURING A WATERLESS MIXTURE OF REFRACTORY MATERIAL WITH THERMOSETTING BINDER INTO A MOLD EXTENDING HORIZONTALLY FROM THE LOWER ENDS OF THE OUTER MOLD TO FORM A RADIAL FLANGE-LIKE BASE INTEGRAL WITH THE OUTER VERTICAL SLEEVE, (DE APPLYING A WIPER STRIP TO THE OUTER PERIPHERY OF THE FLANGE-LIKE BASE, (E) VIBRATING THE WATERLESS MIXTURES WITHIN THE MOLD INTO A COMPACT STATUS SUBSTANTIALLY DEVOID OF AIR POCKETS AND CREVICES. (F) BAKING THE ASSEMBLED MEMBERS AT THE CURING TEMPERATURE OF THE THERMOSETTING BINDER TO FORM RIGID EXOTHERMIC REFRACTORY LINERS, AND (G) STRIPPING THE SECOND TUBULAR MOLD FROM THE INNER TUBULAR SLEEVE.
Claim 2
Independent Claim
173 words
THE METHOD OF PROVIDING A PREFORMED LINER FOR A HOT TOP FOR AN INGOT MOLD COMPRISING THE STEPS OF (A) POURING A WATERLESS MIXTURE OF REFRACTORY MATERIAL WITH THERMOSETTING BINDER INTO A FIRST TUBULAR MOLD TO FORM AN OUTER VERTICAL TUBULAR SLEEVE, (B) POURING A WATERLESS MIXTURE OF EXOTHERMIC MATERIAL WITH THERMOSETTING BINDER INTO A SECOND TUBULAR MOLD WITHIN THE FIRST TUBULAR MOLD FOR THE REFRACTORY MATERIAL TO FORM AN INNER VERTICAL TUBULAR SLEEVE, (C) POURING A WATERLESS MIXTURE OF REFRACTORY MATERIAL WITH THERMOSETTING BINDER INTO A MOLD EXTENDING HORIZONTALLY FROM THE LOWER ENDS OF THE OUTER MOLD TO FORM A RADIAL FLANGE-LIKE BASE INTEGRAL WITH THE OUTER VERTICAL SLEEVE, (DE APPLYING A WIPER STRIP TO THE OUTER PERIPHERY OF THE FLANGE-LIKE BASE, (E) VIBRATING THE WATERLESS MIXTURES WITHIN THE MOLD INTO A COMPACT STATUS SUBSTANTIALLY DEVOID OF AIR POCKETS AND CREVICES. (F) BAKING THE ASSEMBLED MEMBERS AT THE CURING TEMPERATURE OF THE THERMOSETTING BINDER TO FORM RIGID EXOTHERMIC REFRACTORY LINERS, AND (G) STRIPPING THE SECOND TUBULAR MOLD FROM THE INNER TUBULAR SLEEVE.
References Cited (Backward Citations)
US1789883A
Cited
US2361386A
Cited
US2591105A
Cited
US2644218A
Cited
US2863192A
Cited
US2925637A
Cited
US2869191A
Cited
US2944307A
Cited
GB897609A
Cited
US3112541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |