Patent US3669759A successfully refreshed from Google Patents.
US3669759A
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US
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Thermomechanical treatment for improving ductility of carbide-stabilized austenite stainless steel
Assignee: Japan Atomic Energy Agency
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Filing: 1969-09-24
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Granted: 1972-06-13
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Expires: 1989-09-24
Abstract
Abstract AN AUSTENITE STAINLESS STEEL HAVING SUPERIOR DUCTILITY AT HIGH TEMPERATURES IS OBTAINED BY SUBJECTING THE CARBIDESTABILIZED AUSTENITE STAINLESS STEEL TO SOLUTION HEAT TREATMENT, COLD-WORKING SAID STEEL MORE THAN 15%, AND AN- NEALING IT AT A TEMPERATURE BETWEEN 850*C. AND 950*C. FOR LESS THAN FOUR HOURS.
Inventors
- 👤 Tatsuo Kondo
- 👤 Hajime Nakajima
- 👤 Ryukichi Nagasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:18
CPC Classifications
C; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 0
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |