US2822266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing nodular graphite iron
Assignee: Allis Chalmers Corp
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Filing: 1956-10-25
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Granted: 1958-02-04
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Expires: 1976-10-25
Abstract
No abstract record available.
Inventors
- 👤 Walter W Edens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:57
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE METHOD OF MAKING A FERROUS ALLOY CHARACTERIZED IN ITS AS-CAST STATE BY A METALLIC MATRIX HAVING SPHERULAR GRAPHITE INCLUSIONS RANDOMLY DISPERSED THERETHROUGH COMPRISING: PROVIDING A BATH OF MOLTEN CAST IRON CONTAINING GRAPHITE-YIELDING CARBON; TREATING SAID MOLTENT BATH BY SUCCESSIVE ADDITIONS OF A FIRST AND A SECOND SALT MIXTURE TO SAID BATH, SAID FIRST SALT MIXTURE CONTAINING FROM ABOUT 30 TO ABOUT 50 PERCENT SODIUM CALCIUM RIDE BY WEIGHT AND THE REMAINDER ESSENTIALLY CALCIUM SILICON, SAID SECOND SALT MIXTURE CONTAINING FROM ABOUT 30 TO ABOUT 50 PERCENT MAGNESIUM CHLORIDE BY WEIGHT AND THE REMAINDER ESSENTIALLY CALCIUM SILICON; AND CASTING SAID TREATED BATH WHILE SAID MIXTURES ARE EFFECTIVE IN INDUCING THE FORMATION OF SPHERULAR GRAPHITE.
Claim 2
Independent Claim
114 words
THE METHOD OF MAKING A FERROUS ALLOY CHARACTERIZED IN ITS AS-CAST STATE BY A METALLIC MATRIX HAVING SPHERULAR GRAPHITE INCLUSIONS RANDOMLY DISPERSED THERETHROUGH COMPRISING: PROVIDING A BATH OF MOLTEN CAST IRON CONTAINING GRAPHITE-YIELDING CARBON; TREATING SAID MOLTENT BATH BY SUCCESSIVE ADDITIONS OF A FIRST AND A SECOND SALT MIXTURE TO SAID BATH, SAID FIRST SALT MIXTURE CONTAINING FROM ABOUT 30 TO ABOUT 50 PERCENT SODIUM CALCIUM RIDE BY WEIGHT AND THE REMAINDER ESSENTIALLY CALCIUM SILICON, SAID SECOND SALT MIXTURE CONTAINING FROM ABOUT 30 TO ABOUT 50 PERCENT MAGNESIUM CHLORIDE BY WEIGHT AND THE REMAINDER ESSENTIALLY CALCIUM SILICON; AND CASTING SAID TREATED BATH WHILE SAID MIXTURES ARE EFFECTIVE IN INDUCING THE FORMATION OF SPHERULAR GRAPHITE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |