Patent US3249996A successfully refreshed from Google Patents.
US3249996A
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US
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Method of making hot rolled strip suitable for cold rolling to #3 best finish using a double scarfing treatment
Assignee: United States Steel Corp
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Filing: 1962-11-02
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Granted: 1966-05-10
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Expires: 1982-11-02
Abstract
No abstract record available.
Inventors
- 👤 Robert M Clevenger
- 👤 John G Cutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:53
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0278; B; B21; B21B; B21B1/00; B21B1/22; B21B2261/00; B21B2261/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49972; Y10T29/49975; Y10T29/49979; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
A METHOD OF MAKING HOT ROLLED STEEL STRIP SUITABLE FOR COLD ROLLING TO STRIP HAVING A HIGH SURFACE LUSTERR AND CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM SHADOW LINES COMPRISING THE STEPS OF MAKING AN INGOT OF VANADIUM TREATED NON-AGING RIMMING GRADE STEEL, CONTROLLING THE RIMMING ACTION OF THE MOLTEN STEEL IN THE MOLD TO PREVENT ANY SUBSTANTIAL RISE OF THE SOLIDIFYING STEEL IN THE MOLD, THEREAFTER ROLLING THE INGOT TO A SLAB, THEN COMPLETELY SCARFING THE TOP AND BOTTOM SURFACES AND BOTH EDGE SURFACES, THEREAFTER COMPLETELY SCARIFING BOTH EDGE SURFACES A SECOND TIME AND SCARFING A SECOND TIME BOTH THE TOP AND BOTTOM SURFACES INWARDLY FROM EACH OF THE EDGES A DISTANCE EQUAL TO AT LEAST ONE-FOURTH THE WIDTH OF THE SLAB, AND THEN HOT ROLLING THE SLAB TO STEEL STRIP,
Claim 2
Independent Claim
130 words
A METHOD OF MAKING HOT ROLLED STEEL STRIP SUITABLE FOR COLD ROLLING TO STRIP HAVING A HIGH SURFACE LUSTERR AND CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM SHADOW LINES COMPRISING THE STEPS OF MAKING AN INGOT OF VANADIUM TREATED NON-AGING RIMMING GRADE STEEL, CONTROLLING THE RIMMING ACTION OF THE MOLTEN STEEL IN THE MOLD TO PREVENT ANY SUBSTANTIAL RISE OF THE SOLIDIFYING STEEL IN THE MOLD, THEREAFTER ROLLING THE INGOT TO A SLAB, THEN COMPLETELY SCARFING THE TOP AND BOTTOM SURFACES AND BOTH EDGE SURFACES, THEREAFTER COMPLETELY SCARIFING BOTH EDGE SURFACES A SECOND TIME AND SCARFING A SECOND TIME BOTH THE TOP AND BOTTOM SURFACES INWARDLY FROM EACH OF THE EDGES A DISTANCE EQUAL TO AT LEAST ONE-FOURTH THE WIDTH OF THE SLAB, AND THEN HOT ROLLING THE SLAB TO STEEL STRIP,
Claim 3
Dependent Claim
14 words
THE METHOD OF CLAIM 1 WHEREIN HAND OPERATED TORCHES ARE EMPLOYED FOR THE SCARFING.
References Cited (Backward Citations)
US2306370A
Cited
US2555527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |