US3102831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of columbium containing steels
Assignee: MOLYBDENUM CORP
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Filing: 1960-08-10
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Granted: 1963-09-03
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Expires: 1980-08-10
Abstract
No abstract record available.
Inventors
- 👤 Norman F Tisdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:45
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD FOR THE PRODUCTION OF STEELS WHICH COMPRISES PREPARING A STEEL INGOT CONTAINING FROM 0.005% TO 0.050% OF COLUMBIUM, ON A WEIGHT BASIS, HEATING THHE INGOT PRIOR TO ROLLING TO A TEMPERATURE OF AT LEAST 2300*F. UNTIL THE INGOT IS UNIFORMLY HEATED TO A TEMPERATURE FROM ABOUT 2300* TO 2450*F., ROLLING THE INGOT SO THAT WHEN FINISHED IT HAS A TEMPERATURE OF FROM ABOUT 1550* TO 1750*F., AND SUBJECTING THE INGOT TO A WATER SPRAY TO RAPIDLY COOL THE ROLLED STEEL FROM THE FINISHING TEMPERATURE RANGE OF 1550* TO 1750*F., TO A TEMPERATURE RANGE OF 1050* TO 1200*F.
Claim 2
Independent Claim
99 words
A METHOD FOR THE PRODUCTION OF STEELS WHICH COMPRISES PREPARING A STEEL INGOT CONTAINING FROM 0.005% TO 0.050% OF COLUMBIUM, ON A WEIGHT BASIS, HEATING THHE INGOT PRIOR TO ROLLING TO A TEMPERATURE OF AT LEAST 2300*F. UNTIL THE INGOT IS UNIFORMLY HEATED TO A TEMPERATURE FROM ABOUT 2300* TO 2450*F., ROLLING THE INGOT SO THAT WHEN FINISHED IT HAS A TEMPERATURE OF FROM ABOUT 1550* TO 1750*F., AND SUBJECTING THE INGOT TO A WATER SPRAY TO RAPIDLY COOL THE ROLLED STEEL FROM THE FINISHING TEMPERATURE RANGE OF 1550* TO 1750*F., TO A TEMPERATURE RANGE OF 1050* TO 1200*F.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |