US3244565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep drawing steel and method of manufacture
Assignee: Bethlehem Steel Corp
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Filing: 1962-08-10
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Granted: 1966-04-05
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Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Edward H Mayer
- 👤 Donald E Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:09
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0457; C21D3/00; C21D3/02; C21D3/04; C21D8/0473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF MAKING A SHEET OF STEEL COMPRISING HOT ROLLING AND UNKILLED STEEL CONSISTING ESSENTIALLY OF PHOSPHORUS 0.03 TO 0.09%, BALANCE IRON, COLD REDUCING SAID STEEL, HEATING SAID STEEL AT A MAXIMUM RATE OF 500*F. PER HOUR THROUGH THE RANGE 950 TO 1100*F. AND HOLDING SAID STEEL IN A DECARBURIZING ATMOSPHERE WITHIN THE TEMPERATURE RANGE OF 1100 TO 1400*F. FOR A TIME SUFFICIENT TO BOTH ANNEAL THE STEEL AND REDUCE ITS CARBON CONTENT TO 0.010% MAX.
Claim 2
Independent Claim
77 words
A METHOD OF MAKING A SHEET OF STEEL COMPRISING HOT ROLLING AND UNKILLED STEEL CONSISTING ESSENTIALLY OF PHOSPHORUS 0.03 TO 0.09%, BALANCE IRON, COLD REDUCING SAID STEEL, HEATING SAID STEEL AT A MAXIMUM RATE OF 500*F. PER HOUR THROUGH THE RANGE 950 TO 1100*F. AND HOLDING SAID STEEL IN A DECARBURIZING ATMOSPHERE WITHIN THE TEMPERATURE RANGE OF 1100 TO 1400*F. FOR A TIME SUFFICIENT TO BOTH ANNEAL THE STEEL AND REDUCE ITS CARBON CONTENT TO 0.010% MAX.
References Cited (Backward Citations)
US2597979A
Cited
US2986483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |