US3833358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory iron-base alloy resisting to high temperatures
Assignee: Societe des Acieries de Pompey
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Filing: 1972-01-19
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Granted: 1974-09-03
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Expires: 1992-01-19
Abstract
Abstract The refractory iron-base alloy according to the invention has the following composition: % BY WEIGHT Carbon from 0.05 to 0.20 Nickel do. 30 to 40 Chromium do. 20 to 30 Columbium do. 0.2 to 2 Nitrogen do. 0.04 to 0.2 Manganese do. 0.6 to 2 Silicon do. 0.8 to 2 Iron and impurities complementary percentage Said alloy offers high resistance to creep, thermal shocks, heat fatigue and intergranular oxidation, as well as good weldability. More specifically, the proportion of the various elements comply with the formula:
Inventors
- 👤 J Bellot
- 👤 M Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:00
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
30 words
Alloy according to claim 1 wherein the weight proportion of niobium added to half the weight proportion of tantalum is at least equAl to six times the proportion of carbon.
Claim 2
Dependent Claim
17 words
Alloy according to claim 1 wherein the weight proportion of titanium is susbstantially twice that of carbon.
Claim 3
Dependent Claim
14 words
Alloy according to claim 1 containing the following elements in the following weight proportions:
Claim 4
Dependent Claim
27 words
Alloy according to claim 1 containing, by weight, 0.10 - 0.13 % of carbon, 30 - 33 % of nickel and 20 - 23 % of chromium.
Claim 5
Dependent Claim
14 words
Alloy according to claim 1 containing the following elements in the following weight proportions:
Claim 6
Dependent Claim
14 words
Alloy according to claim 1 containing the following elements in the following weight proportions.
References Cited (Backward Citations)
US2570193A
Cited
US2553330A
Cited
US3495977A
Cited
US3512963A
Cited
US3552950A
Cited
US3516826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |