US3245844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot rolled steel strip
Assignee: United States Steel Corp
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Filing: 1962-07-25
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Granted: 1966-04-12
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Anthony P Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:50
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/46; C21D8/00; C21D8/02; C21D8/0221; C21D8/0226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A METHOD OF PRODUCING A COILED STRIP OF HOT ROLLED STEEL HAVING A YIELD-STRENGTH OF AT LEAST 50,000 P.S.I. IN THE HOT ROLLED CONDITION, COMPRISING THE STEPS OF PROVIDING A BLANK OF STEEL CONSISTING ESSENTIALLY OF FROM .10% TO .20% CARBON, FROM .40% TO .60% MAGANESE, FROM .008% TO .015% NITROGEN, .040% MAXIMUM PHOSPHORUS, .050% MAXIMUM SULPHUR, .10% MAXIMUM SILICON, THE BALANCE IRON AND RESIDUAL IMPURITIES, THE COMPOSITION OF SAID STEEL BEING FURTHER CHARACTERIZED BY THE LIMITATION THAT WHEN THE PERCENTAGE OF ANY ONE OF THE CARBON, MANGANESE, OR NITROGEN IS NEAR THE LOWER LIMIT, THE PERCENTAGES OF THE REMAINING TWO ELEMENTS SHOULD BE NEAR THEIR HIGHER LIMITS, HOT ROLLING THE BLANK TO FORM A STRIP OF STEEL WHILE MAINTAINING THE FINISHING TEMPERATURE OF SAID TRIP ABOVE 1520*F., RAPIDLY COOLING SAID STRIP TO BELOW 1050*F., AND COILING SAID COOLED STRIPS.
Claim 2
Independent Claim
140 words
A METHOD OF PRODUCING A COILED STRIP OF HOT ROLLED STEEL HAVING A YIELD-STRENGTH OF AT LEAST 50,000 P.S.I. IN THE HOT ROLLED CONDITION, COMPRISING THE STEPS OF PROVIDING A BLANK OF STEEL CONSISTING ESSENTIALLY OF FROM .10% TO .20% CARBON, FROM .40% TO .60% MAGANESE, FROM .008% TO .015% NITROGEN, .040% MAXIMUM PHOSPHORUS, .050% MAXIMUM SULPHUR, .10% MAXIMUM SILICON, THE BALANCE IRON AND RESIDUAL IMPURITIES, THE COMPOSITION OF SAID STEEL BEING FURTHER CHARACTERIZED BY THE LIMITATION THAT WHEN THE PERCENTAGE OF ANY ONE OF THE CARBON, MANGANESE, OR NITROGEN IS NEAR THE LOWER LIMIT, THE PERCENTAGES OF THE REMAINING TWO ELEMENTS SHOULD BE NEAR THEIR HIGHER LIMITS, HOT ROLLING THE BLANK TO FORM A STRIP OF STEEL WHILE MAINTAINING THE FINISHING TEMPERATURE OF SAID TRIP ABOVE 1520*F., RAPIDLY COOLING SAID STRIP TO BELOW 1050*F., AND COILING SAID COOLED STRIPS.
References Cited (Backward Citations)
US2444788A
Cited
US2814578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |