US2663635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition agent and method for introducing magnesium into cast iron
Assignee: Huntington Alloys Corp
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Filing: 1951-11-21
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Granted: 1953-12-22
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Expires: 1971-11-21
Abstract
No abstract record available.
Inventors
- 👤 Busby Arthur Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; C21C1/105
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
AN IMPROVED PROGESS FOR PRODUCING MAGNESIUM-CONTAINING CAST IRON CONTAINING COMPACTED GRAPHITE WHICH COMPRISES ESTABLISHING A BATH OF MOLTEN CAST IRON OF SUCH A COMPOSITION THAT IF CAST AT LEAST AFTER INOCULATION IT WOULD BE A GRAY CAST IRON; INCORPORATING AT LEAST A SMALL BUT EFFECTIVE AMOUNT OF MAGNESIUM IN SAID BATH BY TREATING SAID MOLTEN BATH WITH ABOUT 1% TO 8% OF AN ADDITION AGENT COMPRISED OF CALCIUM CYANAMIDE AND SUCH A PROPORTION OF A REACTIVE INGREDIENT CONTAINING AT LEAST 10% MAGNESIUM AND UP TO A TOTAL OF 90% OF METAL FROM THE GROUP CONSISTING OF NICKEL, COPPER AND SILICON THAT THE WEIGHT RATIO OF CALCIUM CYANAMIDE TO SAID REACTIVE INGREDIENT IN SAID ADDITION AGENT IS BETWEEN ABOUT 0.5 TO 1 AND ABOUT 6 TO 1; AND CASTING A MAGNESIUM-CONTAINING CASTING FROM METAL OF SAID BATH IN AN INOCULATED CONDITION TO OBTAIN THEREIN UNCOMBINED CARBON AS COMPACTED GRAPHITE.
References Cited (Backward Citations)
US1335370A
Cited
US2543853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |