US3623920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a stainless steel resistive to high temperature and neutron irradiation
Assignee: Japan Atomic Energy Agency
•
Filing: 1969-03-17
•
Granted: 1971-11-30
•
Expires: 1989-03-17
Abstract
Abstract BY SUBJECTING A STAINLESS STEEL OF AISI 300 SERIES TO COLD WORKING OF AT LEAST 10 PERCENT, AND A STRAIN AGING AT 500*C.-800*C., AND THEN TO RECRYSTALLIZATION TREATMENT AT 540*C-950*C., A STAINLESS STEEL HAS BEEN OBTAINED THAT HAS HIGH-TEMPERATURE YIELD STRENGTH APPROXIMATELY TWICE THAT OF THE CONVENTIONAL AUSTENITE STEEL OF THE SAME COMPOSITION, IS RESISTANT TO EMBRITTLEMENT DUE TO HIGH TEMPERATURE REACTOR IRRADIATION, AND YET RETAINS DUCTILITY AND MICROSTRUCTURE STABILITY.
Inventors
- 👤 Tatsuo Kondo
- 👤 Toshihiko Kikuyama
- 👤 Ryukichi Nagasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:00
CPC Classifications
C; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |