Patent US3354940A successfully refreshed from Google Patents.
US3354940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous casting apparatus with improved nozzle composition
Assignee: Harbison Walker Refractories Co
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Filing: 1965-04-16
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Granted: 1967-11-28
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Expires: 1985-04-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank H Walther
- 👤 Joseph R Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:38
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D41/00; B22D41/50; B22D41/52; B22D41/54; C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047; C04B35/0476
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE COMBINATION WITH APPARATUS FOR THE CONTINOUS CASTING OF STEEL, INCLUDING A CONTAINER OF MOLTEN METAL POSITIONED ABOVE A TUNDISH, WHICH TUNDISH INCLUDES A NOZZLE OPENING FROM A LOWER PORTION THEROF WITH ITS EXIT ORIFICE POSITIONED ABOVE A COOLING MOLD, THE IMPROVEMENT COMPRISING SAID NOZZLE BEING CERAMICALLY BONDED AND CHARACTERIZED IN THAT AT LEAST 80%, BY WEIGHT, OF ITS STRUCTURE IS THE PHASE MGO$CR2O3 AND BEING SUBSTANTIALLY FREE OF MATERIALS WHICH FORM GLASS AT TEMPERATURES OF ABOUT 2000*F.
Claim 2
Dependent Claim
78 words
THE COMBINATION WITH APPARATUS FOR THE CONTINOUS CASTING OF STEEL, INCLUDING A CONTAINER OF MOLTEN METAL POSITIONED ABOVE A TUNDISH, WHICH TUNDISH INCLUDES A NOZZLE OPENING FROM A LOWER PORTION THEROF WITH ITS EXIT ORIFICE POSITIONED ABOVE A COOLING MOLD, THE IMPROVEMENT COMPRISING SAID NOZZLE BEING CERAMICALLY BONDED AND CHARACTERIZED IN THAT AT LEAST 80%, BY WEIGHT, OF ITS STRUCTURE IS THE PHASE MGO$CR2O3 AND BEING SUBSTANTIALLY FREE OF MATERIALS WHICH FORM GLASS AT TEMPERATURES OF ABOUT 2000*F.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |