US3303060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atmospheric corrosion-resistant steel sheet for deep drawing
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1963-05-28
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Granted: 1967-02-07
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Expires: 1983-05-28
Abstract
No abstract record available.
Inventors
- 👤 Shimizu Mineo
- 👤 Mastsukura Kameo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:35
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/002; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0473; C22C38/16; C21D3/00; C21D3/02; C21D3/04; C21D3/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A PROCESS FOR PRODUCING STEEL SHEET HAVING ATMOSPHERIC CORROSION RESISTANCE AND DEEP DRAWABILITY COMPRISING STEPS OF MAKING AN INGOT CONSISTING ESSENTIALLY OF LESS THAN 0.10% C, LESS THAN 0.08% SI, 0.20-0.60% MN, 0.04-0.12% P, 0.20-0.60% CU, 0.03-0.5% AS AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF 0.0005-0.05% TI, 0.01-0.05% AL, 0.005-0.05% ZR AND 0.005-0.05% NB HOT AND COLD ROLLING SAID INGOT TO PRODUCE A COLD ROLLED COIL, ANNEALING SAID COLD ROLLED COIL IN A DECARBURIZING ATMOSPHERE GAS IN AN OPEN COIL ANNEALING APPARATUS AND RECRYSTALLIZING, SOFTENING AND ANNEALING SAID COIL WHILE DECARBURIZING AND DENITRIDING SAME AS TO PRODUCE A NON-AGEING STEEL CONTAINING LESS THAN 0.01% C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |