US3716353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Austenitic heat resisting steel
Assignee: JFE Engineering Corp
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Filing: 1970-03-10
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Granted: 1973-02-13
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Expires: 1990-03-10
Abstract
Abstract Cr-Ni system austenitic heat resisting steel having higher heat resistibility at elevated temperatures and for a longer time than common austenitic stainless steel by the multiplied effects of 0.03 to 0.30 C, Ti + Nb content and that the atomic ratio of Ti + Nb/C is within range of 0.05 to 1.0, 0.2 to 4.0% Mo and 0.04 to 0.15% N.
Inventors
- 👤 T Mimino
- 👤 K Kinoshita
- 👤 R Tanaka
- 👤 T Shinoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:33
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
An austenitic heat-resisting steel essentially consisting of, 0.03 to 0.03% by weight C, 15.0 to 26.0% by weight Cr, 7.0 to 22.0% by weight Ni, 0.2 to 4.0% by weight Mo, 0.04 to 0.15% by weight N and Ti+Nb (containing Ta) content that the atomic ratio of Ti+Nb/C is within range of 0.05 to 1.0 and balance Fe.
Claim 2
Dependent Claim
58 words
An austenitic heat-resisting steel essentially consisting of, 0.03 to 0.03% by weight C, 15.0 to 26.0% by weight Cr, 7.0 to 22.0% by weight Ni, 0.2 to 4.0% by weight Mo, 0.04 to 0.15% by weight N and Ti+Nb (containing Ta) content that the atomic ratio of Ti+Nb/C is within range of 0.05 to 1.0 and balance Fe.
References Cited (Backward Citations)
US2159724A
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US2229065A
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US2602737A
Cited
US2801916A
Cited
US3303023A
Cited
US3337331A
Cited
US3337331B1
Cited
US3523788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |