US2986483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sheets with elongated grain structure from rimmed steel
Assignee: United States Steel Corp
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Filing: 1958-06-20
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Granted: 1961-05-30
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Expires: 1978-06-20
Abstract
No abstract record available.
Inventors
- 👤 William C Leslie
- 👤 Reginald L Rickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:01
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/04; C21D8/0447; C21D8/0473
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A METHOD OF PRODUCING AN ELONGATED GRAIN STRUCTURE IN RIMMED STEEL CHARACTERIZED BY GOOD DEEP DRAWING CHARACTERISTICS COMPRISING PRODUCING RIMMING TYPE STEEL CONTAINING COPPER IN EXCESS OF .40%, COLD REDUCING SAID STEEL AT LEAST 30%, HEATING SAID COLD REDUCED STEEL THROUGH THE RANGE OF 750 TO 1150*F. AT A RATE OF LESS THAN 200* F. PER HOUR AND THEN ANNEALING SAID STEEL AT A TEMPERATURE ABOVE 1250*F.
References Cited (Backward Citations)
CA465804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |