US2906652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bright-finished steel strip
Assignee: United States Steel Corp
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Filing: 1956-06-20
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Granted: 1959-09-29
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Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Jr John M Kiefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:53
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0236; B; B21; B21B; B21B1/00; B21B1/22; B21B1/30; C21D8/0247; C21D8/0268; C21D8/0273
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF MAKING BRIGHT-FINISHED STEEL STRIP COMPRISING COLD-ROLLING CLEANED HOT-ROLLED STEEL STRIP SUBSTANTIALLY TO THE DESIRED FINISHED GAGE, THEN ANNEALING THE COLDROLLED STRIP IN COILS UNDER A PROTECTIVE ATMOSPHERE IN FOUR DISTINCT STAGES, I.E. (U) HEATING AT A RATE OF ABOUT 75* F. PER HOUR TO FROM 1075 TO 1175* F., (2) HEATING TO A FINAL TEMPERATURE BETWEEN 1200 AND 1300* F. AT A MAXIMUM RATE EQUAL TO ONE-HALF THE STRIP THICKNESS IN INCHES TIMES 1000* F. PER HOUR, (3) HOLDING AT SAID FINAL TEMPERATURE OF FROM 4 TO 10 HOURS AND (4) COOLING TO A TEMPERATURE OF 300* F. WHILE STILL UNDER SAID ATMOSPHERE, THEN TEMPERROLLING THE STRIP BETWEEN POLISHED ROLLS TO EFFECT A GAGE REDUCTION OF FROM 3 TO 5%.
Claim 2
Independent Claim
123 words
A METHOD OF MAKING BRIGHT-FINISHED STEEL STRIP COMPRISING COLD-ROLLING CLEANED HOT-ROLLED STEEL STRIP SUBSTANTIALLY TO THE DESIRED FINISHED GAGE, THEN ANNEALING THE COLDROLLED STRIP IN COILS UNDER A PROTECTIVE ATMOSPHERE IN FOUR DISTINCT STAGES, I.E. (U) HEATING AT A RATE OF ABOUT 75* F. PER HOUR TO FROM 1075 TO 1175* F., (2) HEATING TO A FINAL TEMPERATURE BETWEEN 1200 AND 1300* F. AT A MAXIMUM RATE EQUAL TO ONE-HALF THE STRIP THICKNESS IN INCHES TIMES 1000* F. PER HOUR, (3) HOLDING AT SAID FINAL TEMPERATURE OF FROM 4 TO 10 HOURS AND (4) COOLING TO A TEMPERATURE OF 300* F. WHILE STILL UNDER SAID ATMOSPHERE, THEN TEMPERROLLING THE STRIP BETWEEN POLISHED ROLLS TO EFFECT A GAGE REDUCTION OF FROM 3 TO 5%.
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) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |