US2841489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nodular cast iron and process of making same
Assignee: Huntington Alloys Corp
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Filing: 1952-02-06
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Granted: 1958-07-01
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Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 Morrogh Henton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
PROCESS FOR THE PRODUCTION OF GREY CAST IRON WHICH CONTAINS COPPER, IS HYPOEUTECTIC IN RELATION TO CARBON, AND IN WHICH THE GRAPHITE IS PRESENT AT LEAST PREDOMINANTLY IN THE FORM OF NODULES, WHICH PROCESS COMPRISES ADDING MAGNESIUM AND CERIUM TO MOLTEN IRON WHICH CONTAINS COPPER, IS HYPOEUTECTIC IN RELATION TO CARBON AND WHICH ON CASTING GIVES A GRAY CAST IRON, AND CASTING THE TREATED MELT; THE TREATED MELT HAVING A COPPER CONTENT OF ABOUT 2% TO 7% WHICH WOULD SUBSTANTIALLY INTERFERE WITH THE NODULARIZING ACTION OF THE MAGNESIUM IN THE ABSENCE OF CERIUM.
Claim 2
Dependent Claim
93 words
PROCESS FOR THE PRODUCTION OF GREY CAST IRON WHICH CONTAINS COPPER, IS HYPOEUTECTIC IN RELATION TO CARBON, AND IN WHICH THE GRAPHITE IS PRESENT AT LEAST PREDOMINANTLY IN THE FORM OF NODULES, WHICH PROCESS COMPRISES ADDING MAGNESIUM AND CERIUM TO MOLTEN IRON WHICH CONTAINS COPPER, IS HYPOEUTECTIC IN RELATION TO CARBON AND WHICH ON CASTING GIVES A GRAY CAST IRON, AND CASTING THE TREATED MELT; THE TREATED MELT HAVING A COPPER CONTENT OF ABOUT 2% TO 7% WHICH WOULD SUBSTANTIALLY INTERFERE WITH THE NODULARIZING ACTION OF THE MAGNESIUM IN THE ABSENCE OF CERIUM.
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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |