Patent US3843423A successfully refreshed from Google Patents.
US3843423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing steel sheets or strips for making cans
Assignee: Nippon Steel Corp
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Filing: 1973-08-23
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Granted: 1974-10-22
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Expires: 1993-08-23
Abstract
Abstract 1. A METHOD FOR PRODUCING CAN-MAKING STEEL SHEET COMPRISING SUBJECTING A STEEL SLAB CONTAINING NOT MORE THAN 0.03% C, NOT MORE THAN 1.0% MN, NOT MORE THAN 0.04% P, NOT MORE THAN 0.02% O, WITH THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES TO FINISH HOT ROLLING AT A TEMPERTURE BETWEEN THE A3 TRANSFORMATION POINT AND 750* C., COILING THE SHEET AT A TEMPERATURE NOT LOWER THAN 620*C., AND COLD ROLLING THUS OBTAINED HOT ROLLED SHEET OR STRIP AFTER ACID PICKLING WITH A REDUCTION RATE NOT LOWER THAN 80%.
Inventors
- 👤 H Asano
- 👤 Y Oyagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:44
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0226; C21D8/0236; C21D8/0278
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD FOR PRODUCING CAN-MAKING STEEL SHEET COMPRISING SUBJECTING A STEEL SLAB CONTAINING NOT MORE THAN 0.03% C, NOT MORE THAN 1.0% MN, NOT MORE THAN 0.04% P, NOT MORE THAN 0.02% O, WITH THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES TO FINISH HOT ROLLING AT A TEMPERTURE BETWEEN THE A3 TRANSFORMATION POINT AND 750* C., COILING THE SHEET AT A TEMPERATURE NOT LOWER THAN 620*C., AND COLD ROLLING THUS OBTAINED HOT ROLLED SHEET OR STRIP AFTER ACID PICKLING WITH A REDUCTION RATE NOT LOWER THAN 80%.
Claim 2
Independent Claim
87 words
A METHOD FOR PRODUCING CAN-MAKING STEEL SHEET COMPRISING SUBJECTING A STEEL SLAB CONTAINING NOT MORE THAN 0.03% C, NOT MORE THAN 1.0% MN, NOT MORE THAN 0.04% P, NOT MORE THAN 0.02% O, WITH THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES TO FINISH HOT ROLLING AT A TEMPERTURE BETWEEN THE A3 TRANSFORMATION POINT AND 750* C., COILING THE SHEET AT A TEMPERATURE NOT LOWER THAN 620*C., AND COLD ROLLING THUS OBTAINED HOT ROLLED SHEET OR STRIP AFTER ACID PICKLING WITH A REDUCTION RATE NOT LOWER THAN 80%.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |