Patent US3798076A successfully refreshed from Google Patents.
US3798076A
Expired / Lapsed
US
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METHOD FOR PRODUCING Al-KILLED DEEP DRAWING COLD ROLLED STEEL PLATE BY CONTINUOUS ANNEALING
Assignee: Nippon Steel Corp
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Filing: 1972-04-27
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Granted: 1974-03-19
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Expires: 1992-04-27
Abstract
Abstract A method of producing an aluminum-killed cold rolled steel sheet for deep drawing by a continuous annealing, which comprises cold rolling a hot rolled steel plate containing not more than 0.015 percent of carbon, 0.05 to 0.50 percent of manganese, 0.13 to 0.33 percent of soluble aluminum with the balance being iron and unavoidable impurities.
Inventors
- 👤 K Suemune
- 👤 S Nagao
- 👤 M Shimizu
- 👤 H Takechi
- 👤 K Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:04
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/06; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0473
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
A method according to claim 1, wherein said hot rolled steel plate contains 0.18 to 0.30 percent of soluble aluminum.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |