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Patent US3607239A successfully refreshed from Google Patents.
US3607239A
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Austenitic heat resisting steel
Assignee: JFE Engineering Corp
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Filing: 1968-11-06
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Granted: 1971-09-21
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Expires: 1988-11-06
Abstract
Abstract Cr-Ni type austenitic heat resisting steel having about twice the heat resistibility of common stainless steel by the addition of 0.001% to 0.30% by weight Ti, 0.001% to 0.30% by weight Nb + Ta and 0.05% to 2.50% by weight V to a well-known Cr-Ni type steel composition for elevated temperature service.
Inventors
- 👤 Tohru Mimino
- 👤 Kazuhisa Kinoshita
- 👤 Takayuki Shinoda
- 👤 Isao Minegishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:17
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/50; C22C38/46; C22C38/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2190486A
Cited
US2793113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |