US2624668A
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
- 👤 Binder William Oakley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
FERRITIC CHROMIUM STEEL CONTAINING 20% TO 30% CHROMIUM; UP TO 0.035% CARB ON; UP TO 0.08% NITROGEN, THE SUM OF CARBON AND NITROGEN BEING IN EXCESS OF 0.06%; 0.25% TO 3% MANGANESE; UP TO 1% SILICON; 0.25% TO 1.5% ALUMINUM; 0.5% TO3.5% NICKEL; UP TO 3% COPPER, THE SUM OF NICKEL AND COPPER NOT EXCEEDING 4%: UP TO 3% MOLYBDENUM; THE REMAINDER IRON AND INCIDENTAL IMPURITIES, SUCH STEEL HAVING , IN THE ANNEALDED CONDITION, A AVERAGE IZOD IMPACT STRENGTH OF AT LEAST 25 FOOT POUNDS AT ROOM TAMPERATURE.
Claim 2
Dependent Claim
88 words
FERRITIC CHROMIUM STEEL CONTAINING 20% TO 30% CHROMIUM; UP TO 0.035% CARB ON; UP TO 0.08% NITROGEN, THE SUM OF CARBON AND NITROGEN BEING IN EXCESS OF 0.06%; 0.25% TO 3% MANGANESE; UP TO 1% SILICON; 0.25% TO 1.5% ALUMINUM; 0.5% TO3.5% NICKEL; UP TO 3% COPPER, THE SUM OF NICKEL AND COPPER NOT EXCEEDING 4%: UP TO 3% MOLYBDENUM; THE REMAINDER IRON AND INCIDENTAL IMPURITIES, SUCH STEEL HAVING , IN THE ANNEALDED CONDITION, A AVERAGE IZOD IMPACT STRENGTH OF AT LEAST 25 FOOT POUNDS AT ROOM TAMPERATURE.
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 |