US3623862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of rare earth elements for reducing nozzle deposits in the continuous casting of steel process
Assignee: International Motors LLC
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Filing: 1968-06-24
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Granted: 1971-11-30
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Expires: 1988-06-24
Abstract
Abstract A CONTINUOUS CASTING PROCESS WHEREIN RARE EARTH METALS OR RARE EARTH SILICIDES OR OTHER ALLOYS OF THE RARE EARTH METALS ARE USED TO DEOXIDIZE STEEL TO THEREBY PREVENT THE CLOGGING OF TUNDISH METERING NOZZLES NAD PERMIT THE UNINTERRUPTED CONTINUOUS CASTING OF LARGE PRODUCTION STEEL HEATS.
Inventors
- 👤 Arthur F Spengler Jr
- 👤 William P Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:41
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0056; B; B22; B22D; B22D11/00; B22D11/10; B22D11/11
Claims Analysis
Total Claims: 0
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |