US2867555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nodular cast iron and process of manufacture thereof
Assignee: Individual
•
Filing: 1955-11-28
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Granted: 1959-01-06
•
Expires: 1975-11-28
Abstract
No abstract record available.
Inventors
- 👤 Curry Thomas Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:36
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08; C22C33/10; C22C33/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE MANUFACTURE OF CHILLED CAST AND ANNEALED NODULAR IRON HAVING SPHEROIDAL GRAPHITE, GRAPHITIC AGGREGATES AND FLAKES, THE PROCESS OF SIMULTANEOUSLY INJECTING MOLTEN METAL WITH CALCIUM CARBIDE AND A NODULIZING ALLOY CONTAINING MAGNESIUM, THE RELATIVE QUANTITY OF CALCIUM CARBIDE BEING SUFFICIENT TO PROTECT THE MAGNESIUM FROM OXIDATION AND TO CONTROL THE AMOUNT OF RESIDUAL MAGNESIUM WITHIN THE RANGE OF LESS THAN 0.01%, THEN COOLING AND SOLIDIFYING THE IRON AND THEREAFTER ANNEALING THE CASTING THEREOF.
Claim 2
Dependent Claim
74 words
IN THE MANUFACTURE OF CHILLED CAST AND ANNEALED NODULAR IRON HAVING SPHEROIDAL GRAPHITE, GRAPHITIC AGGREGATES AND FLAKES, THE PROCESS OF SIMULTANEOUSLY INJECTING MOLTEN METAL WITH CALCIUM CARBIDE AND A NODULIZING ALLOY CONTAINING MAGNESIUM, THE RELATIVE QUANTITY OF CALCIUM CARBIDE BEING SUFFICIENT TO PROTECT THE MAGNESIUM FROM OXIDATION AND TO CONTROL THE AMOUNT OF RESIDUAL MAGNESIUM WITHIN THE RANGE OF LESS THAN 0.01%, THEN COOLING AND SOLIDIFYING THE IRON AND THEREAFTER ANNEALING THE CASTING THEREOF.
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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |