US2924544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical process for cold-finishing steel
Assignee: Lasalle Steel Co
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Filing: 1956-10-22
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Granted: 1960-02-09
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Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Elliot S Nachtman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:17
CPC Classifications
C; C21; C21D; C21D7/00; C21D7/13; A; A61; A61C; A61C7/00; C23; C23C; C23C8/00; C23C8/06; G; G21; G21C; G21C1/00; G21C1/04; G21C1/06; G21C1/08; G21C1/10; G21C1/12; G21C11/00; G21C11/02; G21C11/022; G21C13/00; G21C13/08; G21C13/087; G21C15/00; G21C15/02; G21C15/12; H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806; H02M7/5383; H02M7/53832; H02M7/53835; H02M7/53846; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/282; H05B41/2821; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METALLURGICAL PROCESS FOR TREATING STEEL OF THE NON-AUSTENITIC TYPE HAVING A PEARLITIC STRUCTURE IN A MATRIX OF FREE FERRITE COMPRISING THE COMBINATION OF STEPS OF HEATING THE STEEL TO COMPRISING THE COMBINATION OF STEPS OF ING THE STEEL TO FORM MARTENSITE, TEMPERING THE STEEL, AND ADVANCING THE TEMPERED MARTENSITIC STEEL THROUGH A DRAW DIE TO EFFECT REDUCTION IN CROSS-SECTIONAL AREA IN A DRAWING OPERATION WHILE THE STEEL IS AT A TEMPERATURE WITHIN THE RANGE OF 400*F. TO THE LOWER CRITICAL TEMPERATURE FOR THE STEEL COMPOSITION.
Claim 2
Dependent Claim
86 words
THE METALLURGICAL PROCESS FOR TREATING STEEL OF THE NON-AUSTENITIC TYPE HAVING A PEARLITIC STRUCTURE IN A MATRIX OF FREE FERRITE COMPRISING THE COMBINATION OF STEPS OF HEATING THE STEEL TO COMPRISING THE COMBINATION OF STEPS OF ING THE STEEL TO FORM MARTENSITE, TEMPERING THE STEEL, AND ADVANCING THE TEMPERED MARTENSITIC STEEL THROUGH A DRAW DIE TO EFFECT REDUCTION IN CROSS-SECTIONAL AREA IN A DRAWING OPERATION WHILE THE STEEL IS AT A TEMPERATURE WITHIN THE RANGE OF 400*F. TO THE LOWER CRITICAL TEMPERATURE FOR THE STEEL COMPOSITION.
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |