Patent US3230099A successfully refreshed from Google Patents.
US3230099A
Expired / Lapsed
US
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Carbon dioxide cured sand molds employing dry sodium silicate binder
Assignee: Dow Chemical Co
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Filing: 1960-09-01
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Granted: 1966-01-18
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Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 Ronald H Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:02
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A COMPOSITION OF MATTER USEFUL FOR MAKING SAND CORES AND MOLDS CURABLE BY SUBJECTING TO AN AMBIENT ATMOSPHERE COMPRISING CARBON DIOXIDE GAS CONSISTING OF A MIXTURE OF FOUNDRY GRADE SAND AND A POWDERED DRY SODIUM SILICATE, COMPOSED OF BETWEEN 0.5 AND 1.5 MOLES OF SIO2 PER MOLE OF NA2O, AND IN AN AMOUNT OF AT LEASE 2 PARTS OF THE SODIUM SILICATE WHEN THE MOLAR RATION OF SIO2 TO NA2O APPROACHES 0.5 AND IN AN AMOUNT OF AT LEAST 3 PARTS PER 100 PARTS OF SAND, WHEN THE MOLAR RATIO OF SIO2 TO NA2O APPROACHES 1.5, AND WATER IN AN AMOUNT SUFFICIENT TO MAKE A MOLDABLE MASS BUT NOT SUBSTANTIALLY IN EXCESS OF THE WEIGHT OF THE SODIUM SILICATE EMPLOYED.
Claim 2
Dependent Claim
120 words
A COMPOSITION OF MATTER USEFUL FOR MAKING SAND CORES AND MOLDS CURABLE BY SUBJECTING TO AN AMBIENT ATMOSPHERE COMPRISING CARBON DIOXIDE GAS CONSISTING OF A MIXTURE OF FOUNDRY GRADE SAND AND A POWDERED DRY SODIUM SILICATE, COMPOSED OF BETWEEN 0.5 AND 1.5 MOLES OF SIO2 PER MOLE OF NA2O, AND IN AN AMOUNT OF AT LEASE 2 PARTS OF THE SODIUM SILICATE WHEN THE MOLAR RATION OF SIO2 TO NA2O APPROACHES 0.5 AND IN AN AMOUNT OF AT LEAST 3 PARTS PER 100 PARTS OF SAND, WHEN THE MOLAR RATIO OF SIO2 TO NA2O APPROACHES 1.5, AND WATER IN AN AMOUNT SUFFICIENT TO MAKE A MOLDABLE MASS BUT NOT SUBSTANTIALLY IN EXCESS OF THE WEIGHT OF THE SODIUM SILICATE EMPLOYED.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |