Patent US2418271A successfully refreshed from Google Patents.
Patent US2930709A successfully refreshed from Google Patents.
US2930709A
Expired / Lapsed
US
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Inorganic bonded cores for steel castings
Assignee: STEEL FOUNDERS SOC OF AMERICA
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Filing: 1958-01-02
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Granted: 1960-03-29
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Expires: 1978-01-02
Abstract
No abstract record available.
Inventors
- 👤 Cameron G Harman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:14
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/185; B22C1/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A CORE MAKING COMPOSITION COMPOSED OF ABOUT 96% BY WEIGHT OF MOLDING SAND AND BOUT 4% BY WEIGHT OF A BINDER CONSISTING ESSENTIALLY OF ABOUT 33% BY WEIGHT OF NA6P6O18, ABOUT 29% BY WEIGHT OF FINELY DIVIDED ZRO2, HAVING A PARTICLE SIZE BETWEEN 1 AND 10 MICRONS, ABOUT 10% BY WEIGHT OF FINELY DIVIDED KAOLIN, BALANCE WATER.
Claim 2
Dependent Claim
57 words
A CORE MAKING COMPOSITION COMPOSED OF ABOUT 96% BY WEIGHT OF MOLDING SAND AND BOUT 4% BY WEIGHT OF A BINDER CONSISTING ESSENTIALLY OF ABOUT 33% BY WEIGHT OF NA6P6O18, ABOUT 29% BY WEIGHT OF FINELY DIVIDED ZRO2, HAVING A PARTICLE SIZE BETWEEN 1 AND 10 MICRONS, ABOUT 10% BY WEIGHT OF FINELY DIVIDED KAOLIN, BALANCE WATER.
References Cited (Backward Citations)
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Cited
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US2383812A
Cited
US2479504A
Cited
US2681860A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |