Patent US4282131A successfully refreshed from Google Patents.
Patent US3598658A successfully refreshed from Google Patents.
US3598658A
Expired / Lapsed
US
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Method for manufacturing cold-rolled steel sheet
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1968-05-20
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Granted: 1971-08-10
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Expires: 1988-05-20
Abstract
Abstract A METHOD OF MANUFACTURING COLD-ROLLED STEEL SHEET COMPRISING STEPS OF PRODUCING INGOTS FROM A MOLTEN STEEL COMPOSED MAINLY OF 0.06 TO 0.15% C AND 0.10 TO 0.25% MN, TO WHICH LESS THAN 0.06% CU AND 0.015 TO 0.035% P ARE INCLUDED AND MORE OVER AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF V, NB, AL, TI AND ZR IS INCLUDED IN SMALL AMOUNT, IF DESIRED, WHILE REGULATING NON-METALLIC INCLUSION CLEANLINESS OF THE STEEL SHEET TO 0.2% TO 0.5% AND SUBJECTING A STEEL SHEET OBTAINED THROUGH HOT-ROLLING AND COLD-ROLLING TO A DECRABURIZING ANNEALING TO REDUCE THE CARBON CONTENT OF 0.002 TO 0.015%. D R A W I N G
Inventors
- 👤 Kameo Matsukura
- 👤 Masami Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:58
CPC Classifications
C; C21; C21D; C21D3/00; C21D3/02; C21D3/04; C21D8/00; C21D8/02; C21D8/04; C21D8/041; C21D8/0421; C21D8/0426; C21D8/0436; C21D8/0447; C21D8/0473
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |