Patent US2889222A successfully refreshed from Google Patents.
US2889222A
Expired / Lapsed
US
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Process for the production of nodular cast iron
Assignee: Union Carbide Corp
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Filing: 1953-12-30
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Granted: 1959-06-02
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Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 Edward F Kurzinski
- 👤 John F Collins
- 👤 Homer C Barnes
- 👤 George P Dahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:50
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08; C22C33/10; C22C33/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PRODUCTION OF NODULAR CAST IRON WHICH COMPRISES ENTRAINING IN A STREAM OF AN INERT GAS A COMMINUTED MIXTURE OF AT LEAST ONE OF THE NODULIZING AGENTS IN THE GROUP CONSISTING OF MAGNESIUM AND MAGNESIUM ALLOYS, AT LEAST ONE OF THE INOCULANTS IN THE GROUP CONSISTING OF SILICON AND SILICON ALLOYS, AND A REFRACTORY DILUENT, INJECTING SAID MIXTURE INTO A BATH OF MOLTEN CAST IRON, AND CASTING SAID CAST IRON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |