US3055755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Austenitic ductile iron having high notch ductility at low temperature
Assignee: Huntington Alloys Corp
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Filing: 1961-06-30
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Granted: 1962-09-25
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Expires: 1981-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert D Schelleng
- 👤 William K Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:49
CPC Classifications
C; C22; C22C; C22C37/00; C21; C21C; C21C1/00; C21C1/08; C22C37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN AUSTENITIC DUCTILE IRON CONSISTING ESSENTIALLY OF ABOUT 2% TO 3% CARBON, ABOUT 1% TO 3% SILICON, ABOUT 20% TO 24% NICKEL WITH THE CARBON, SILICON AND NICKEL CONTENTS BEING SO RELATED THAT THE SUM OF THE CARBON CONTENT PLUS 0.2 TIMES THE SILICON CONTENT PLUS 0.06 TIMES THE NICKEL CONTENT DOES NOT EXCEED 4,4 ABOUT 3.25% TO 5% MANGANESE, A SMALL AMOUNT UP TO ABOUT 0.12% OF MAGNESIUM EFFECTIVE TO INDUCE THE OCCURRENCE OF SPHEROIDAL GRAPHITE IN THE CAST IRON AND THE BALANCE ESSENTIALLY IRON.
Claim 2
Dependent Claim
86 words
AN AUSTENITIC DUCTILE IRON CONSISTING ESSENTIALLY OF ABOUT 2% TO 3% CARBON, ABOUT 1% TO 3% SILICON, ABOUT 20% TO 24% NICKEL WITH THE CARBON, SILICON AND NICKEL CONTENTS BEING SO RELATED THAT THE SUM OF THE CARBON CONTENT PLUS 0.2 TIMES THE SILICON CONTENT PLUS 0.06 TIMES THE NICKEL CONTENT DOES NOT EXCEED 4,4 ABOUT 3.25% TO 5% MANGANESE, A SMALL AMOUNT UP TO ABOUT 0.12% OF MAGNESIUM EFFECTIVE TO INDUCE THE OCCURRENCE OF SPHEROIDAL GRAPHITE IN THE CAST IRON AND THE BALANCE ESSENTIALLY IRON.
References Cited (Backward Citations)
US2842437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |