US2624669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferritic chromium steels
Assignee: Union Carbide Corp
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Filing: 1951-01-19
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Granted: 1953-01-06
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Expires: 1971-01-19
Abstract
No abstract record available.
Inventors
- 👤 Crafts Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:52
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
FERRITIC CHROMIUM STEEL CONATINING 20% TO 30% CHROMIUM; 0.25% TO 1.5% ALUMINIUM;UP TO 0.03% CARBON; UP TO 0.08% NITROGEN, THE SUM OF CARBON AND NITROGEN BEING IN EXCESS OF 0.06%; UP TO 2% MANGANESE; UP TO 1% SILICON; UP TO 3% MOLYBDENUM; THE REMAINDER IRON AND INCIDENTAL IMPURITIES, SUCH STEEL HAVING, IN THE ANNEALED CONDITION, AN AVERAGE IZOD IMPACT STRENGTH OF AT LEAST 15 FOOT POUNDS AT ROOM TEMPERATURE.
Claim 2
Dependent Claim
69 words
FERRITIC CHROMIUM STEEL CONATINING 20% TO 30% CHROMIUM; 0.25% TO 1.5% ALUMINIUM;UP TO 0.03% CARBON; UP TO 0.08% NITROGEN, THE SUM OF CARBON AND NITROGEN BEING IN EXCESS OF 0.06%; UP TO 2% MANGANESE; UP TO 1% SILICON; UP TO 3% MOLYBDENUM; THE REMAINDER IRON AND INCIDENTAL IMPURITIES, SUCH STEEL HAVING, IN THE ANNEALED CONDITION, AN AVERAGE IZOD IMPACT STRENGTH OF AT LEAST 15 FOOT POUNDS AT ROOM TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-06 | 1956-07-07 | 1957-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-06 | 1960-07-07 | 1961-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-06 | 1964-07-07 | 1965-01-06 | $7700.00 | Window Closed / Lapsed |