Patent US2750284A successfully refreshed from Google Patents.
US2750284A
Expired / Lapsed
US
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Process for producing nodular graphite iron
Assignee: Allis Chalmers Corp
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Filing: 1951-12-22
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Granted: 1956-06-12
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Expires: 1971-12-22
Abstract
No abstract record available.
Inventors
- 👤 Harry K Ihrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS FOR OBTAINING FROM A MOLTEN FERROUS METAL CONTAINING GRAPHITE YIELDING CARBON A FERROUS METAL CHARACTERIZED IN THE SOLID STATE BY THE PRESENCE OF SPHERULAR GRANULES OF GRAPHITE THEREIN, COMPRISING: BRINGING TOGETHER SAID MOLTEN FERROUS METAL, A HALIDE OF A SPHERULAR GRAPHITE INDUCING ELEMENT SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, MAGNESIUM, STRONTIUM, BARIUM, RUBIDIUM AND CERIUM, AND AN AGENT CAPABLE OF REDUCING SAID HALIDE IN SAID MOLTEN FERROUS METAL, SAID AGENT CONSISTING ESSENTIALLY OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF CALCIUM, BARIUM, AND POTASSIUM; AND SOLIDIFYING SAID MOLTEN FERROUS METAL WHILE SAID SPHERULAR GRAPHITE INDUCING ELEMENT IS EFFECTIVE IN INDUCING THE FORMATION OF SPHERULAR GRAPHITE.
Claim 2
Dependent Claim
110 words
THE PROCESS FOR OBTAINING FROM A MOLTEN FERROUS METAL CONTAINING GRAPHITE YIELDING CARBON A FERROUS METAL CHARACTERIZED IN THE SOLID STATE BY THE PRESENCE OF SPHERULAR GRANULES OF GRAPHITE THEREIN, COMPRISING: BRINGING TOGETHER SAID MOLTEN FERROUS METAL, A HALIDE OF A SPHERULAR GRAPHITE INDUCING ELEMENT SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, MAGNESIUM, STRONTIUM, BARIUM, RUBIDIUM AND CERIUM, AND AN AGENT CAPABLE OF REDUCING SAID HALIDE IN SAID MOLTEN FERROUS METAL, SAID AGENT CONSISTING ESSENTIALLY OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF CALCIUM, BARIUM, AND POTASSIUM; AND SOLIDIFYING SAID MOLTEN FERROUS METAL WHILE SAID SPHERULAR GRAPHITE INDUCING ELEMENT IS EFFECTIVE IN INDUCING THE FORMATION OF SPHERULAR GRAPHITE.
References Cited (Backward Citations)
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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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |