US2867557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing silicon steel strip
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1956-08-02
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Granted: 1959-01-06
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 John H Crede
- 👤 Robert H Henke
- 👤 Edward L Pulaski
- 👤 Carl P Stroble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:53
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1216; C21D8/1222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS OF PRODUCING HIGHLY GRAIN ORIENTED SILICON STEEL FOR MAGNETIC PURPOSES, SAID STEEL CONTAINING SUBSTANTIALLY 2.5% TO 4% SILICON, INCLUDING AS STEPS, HOT WORKING THE STEEL FROM INGOT TO HOT ROLLED STRIP FOLLOWED BY A COLD ROLLING TREATMENT AND A FINAL HIGH TEMPERATURE ANNEAL, THE HOT WORKING BEING ACCOMPLISHED BY HEATING THE INGOT TO A TEMPERATURE ABOUT 2300* F. AND SLABBING THE HEATED STEEL TO PRODUCE A HOT SLAB HAVING A THICKNESS OF FROM 3/4 TO 11/2 INCHES AND A TEMPERATURE OF NOT LESS THAN 2000* F., AND IMMEDIATELY SUBJECTING THE HOT ROLLED STRIP TO A SERIES OF HOT REDUCTIONS TO PRODUCE A HOT ROLLED STRIP HAVING A THICKNESS OF 0.060 TO 0.10 INCH BEFORE THE TEMPERATURE OF SAID HOT ROLLED STRIP DECREASES TO BELOW 1600* F., THE DIRECT HOT WORKING FROM HEATED INGOT TO HOT ROLLED STRIP BEING A DIRECT HOT WORKING WITHOUT AN INTERMEDIATE REHEATING OF THE STEEL.
Claim 2
Dependent Claim
151 words
A PROCESS OF PRODUCING HIGHLY GRAIN ORIENTED SILICON STEEL FOR MAGNETIC PURPOSES, SAID STEEL CONTAINING SUBSTANTIALLY 2.5% TO 4% SILICON, INCLUDING AS STEPS, HOT WORKING THE STEEL FROM INGOT TO HOT ROLLED STRIP FOLLOWED BY A COLD ROLLING TREATMENT AND A FINAL HIGH TEMPERATURE ANNEAL, THE HOT WORKING BEING ACCOMPLISHED BY HEATING THE INGOT TO A TEMPERATURE ABOUT 2300* F. AND SLABBING THE HEATED STEEL TO PRODUCE A HOT SLAB HAVING A THICKNESS OF FROM 3/4 TO 11/2 INCHES AND A TEMPERATURE OF NOT LESS THAN 2000* F., AND IMMEDIATELY SUBJECTING THE HOT ROLLED STRIP TO A SERIES OF HOT REDUCTIONS TO PRODUCE A HOT ROLLED STRIP HAVING A THICKNESS OF 0.060 TO 0.10 INCH BEFORE THE TEMPERATURE OF SAID HOT ROLLED STRIP DECREASES TO BELOW 1600* F., THE DIRECT HOT WORKING FROM HEATED INGOT TO HOT ROLLED STRIP BEING A DIRECT HOT WORKING WITHOUT AN INTERMEDIATE REHEATING OF THE STEEL.
References Cited (Backward Citations)
US1852836A
Cited
US2084337A
Cited
GB474544A
Cited
US2088440A
Cited
US2378321A
Cited
US2599340A
Cited
US2618843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |