Patent US2767835A successfully refreshed from Google Patents.
US2767835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of extruding steel
Assignee: Lasalle Steel Co
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Filing: 1955-06-27
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Granted: 1956-10-23
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Elliot S Nachtman
- 👤 Eldon B Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:06
CPC Classifications
C; C21; C21D; C21D8/00; C21D9/00; C21D9/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF PROCESSING A HOT ROLLED STEEL OF THE NON-AUSTENITIC TYPE HAVING A PEARLITIC STRUCTURE IN A MATRIX OF FREE FERRITE WHICH HARDENS WHEN WORKED AT A TEMPERATURE BETWEEN 850* F. AND THE LOWER CRITICAL TEMPERATURE FOR THE STEEL COMPOSITION, COMPRISING THE STEPS OF DESCALING THE STEEL AND LUBRICATING THE SURFACES OF THE STEEL AND DRAWING THE STEEL THROUGH A DRAWING DIE TO EFFECT REDUCTION IN CROSS-SECTIONAL AREA WHILE THE STEEL IS AT A TEMPERATURE ABOVE 850* F. BUT BELOW THE LOWER CRITICAL TEMPERATURE OF THE STEEL COMPOSITION WHEREBY THE DRAWN STEEL IS CHARACTERIZED BY IMPROVED PHYSICAL AND MECHANICAL PROPERTIES AND LOW RESIDUAL STRESSES.
Claim 2
Independent Claim
105 words
THE METHOD OF PROCESSING A HOT ROLLED STEEL OF THE NON-AUSTENITIC TYPE HAVING A PEARLITIC STRUCTURE IN A MATRIX OF FREE FERRITE WHICH HARDENS WHEN WORKED AT A TEMPERATURE BETWEEN 850* F. AND THE LOWER CRITICAL TEMPERATURE FOR THE STEEL COMPOSITION, COMPRISING THE STEPS OF DESCALING THE STEEL AND LUBRICATING THE SURFACES OF THE STEEL AND DRAWING THE STEEL THROUGH A DRAWING DIE TO EFFECT REDUCTION IN CROSS-SECTIONAL AREA WHILE THE STEEL IS AT A TEMPERATURE ABOVE 850* F. BUT BELOW THE LOWER CRITICAL TEMPERATURE OF THE STEEL COMPOSITION WHEREBY THE DRAWN STEEL IS CHARACTERIZED BY IMPROVED PHYSICAL AND MECHANICAL PROPERTIES AND LOW RESIDUAL STRESSES.
References Cited (Backward Citations)
US1957427A
Cited
US2400866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |