US2922713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium bearing cast iron
Assignee: Individual
•
Filing: 1957-10-31
•
Granted: 1960-01-26
•
Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 William H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:12
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08; C22C33/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF PRODUCING A CAST IRON CASTING CONTAINING NODULAR AND SPHEROIDAL GRAPHITE FROM A CAST IRON MELT, SAID CASTING HAVING LESS THAN .04% RETAINED MAGNESIUM, SAID METHOD COMPRISING ADDING TO SAID MELT A MIXTURE OF CALCIUM SILICIDE, CALCIUM FLUORIDE AND A MAGNESIUM ALLOY, THE MAGNESIUM CONTENT OF SAID AGENT BEING IN AN AMOUNT IN EXCESS OF THAT REQUIRED TO PRODUCE ABOVE .04% RETAINED MAGNESIUM IN THE CAST IRON, SAID CALCIUM SILICIDE AND CALCIUM FLUORIDE ACTING TO LIMIT THE RETAINED MAGNESIUM OF UNDER .04%, SAID MAGNESIUM ALLOY WHEN ADDED TO SAID MELT BY ITSELF BEING UNABLE TO PRODUCE A CASTING CONTAINING NODULAR AND SPHEROIDAL GRAPHITE AT A RETAINED MAGNESIUM LEVEL OF UNDER .04%, AND FINALLY POURING SAID MELT TO PRODUCE SAID CASTING.
Claim 2
Independent Claim
122 words
THE METHOD OF PRODUCING A CAST IRON CASTING CONTAINING NODULAR AND SPHEROIDAL GRAPHITE FROM A CAST IRON MELT, SAID CASTING HAVING LESS THAN .04% RETAINED MAGNESIUM, SAID METHOD COMPRISING ADDING TO SAID MELT A MIXTURE OF CALCIUM SILICIDE, CALCIUM FLUORIDE AND A MAGNESIUM ALLOY, THE MAGNESIUM CONTENT OF SAID AGENT BEING IN AN AMOUNT IN EXCESS OF THAT REQUIRED TO PRODUCE ABOVE .04% RETAINED MAGNESIUM IN THE CAST IRON, SAID CALCIUM SILICIDE AND CALCIUM FLUORIDE ACTING TO LIMIT THE RETAINED MAGNESIUM OF UNDER .04%, SAID MAGNESIUM ALLOY WHEN ADDED TO SAID MELT BY ITSELF BEING UNABLE TO PRODUCE A CASTING CONTAINING NODULAR AND SPHEROIDAL GRAPHITE AT A RETAINED MAGNESIUM LEVEL OF UNDER .04%, AND FINALLY POURING SAID MELT TO PRODUCE SAID CASTING.
References Cited (Backward Citations)
US2652324A
Cited
US2662820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |