US2779675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry practice
Assignee: Ford Motor Co
•
Filing: 1953-06-02
•
Granted: 1957-01-29
•
Expires: 1973-06-02
Abstract
No abstract record available.
Inventors
- 👤 Vennerholm Gosta
- 👤 Harold N Bogart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:07
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
THE PROCESS OF PRODUCING NODULAR IRON CASTINGS COM PRISING CHARGING INTO A BASICLY OPERATED CUPOLA A FERROUS CHARGE, LIMESTONE TO THE EXTENT OF 9 TO 12%, FLUOR SPAR TO THE EXTENT OF 2 TO 5% AND COKE TO THE EXTENT OF 575 TO 650 POUNDS TO EACH 2920 POUNDS OF METALLICS, INJECTING AIR INTO THE CUPOLA AT A PLURALITY OF POINTS WHICH ARE SUBSTANTIALLY REMOVED FROM THE WALL OF THE CUPOLA, REGULATING THE BLOWING RATE TO PRODUCE AN IRON SUBSTANTIALLY SATURATED WITH CARBON AND TO PRODUCE A SLAG HAVING A MANGANESE OXIDE CONTENT OF FROM 0.1% TO 0.4%, TRAPPING THE CUPOLA INTO LADLES TO WHICH HAS BEEN ADDED A FLOURIDE CONTAINING FLUX, ADDING A MAGNESIUM BEARING ALLOY IN AN AMOUNT TO LEAVE A MAGNESIUM RESIDUAL OF FROM 0.005% TO 0.030%, INOCULATING AND CASTING THE METAL.
References Cited (Backward Citations)
US2643185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |