US3137046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry sand composition and method of preparation
Assignee: International Minerals and Chemical Corp
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Filing: 1960-10-24
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Granted: 1964-06-16
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Expires: 1980-10-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Barlow
- 👤 Oscar L Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:06
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/186; B22C1/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A FOUNDRY SAND COMPOSITION CONTAINING AS ESSENTIAL INGREDIENTS THEREOF A MAJOR PROPORTION OF SAND, WATER, A SAND BINDING QUANTITY OF, AN ALKALI-METAL SILICATE HAVING AN M2O;SIO2 WEIGHT RATIO IN THE RANGE BETWEEN ABOUT 1:1 AND ABOUT 1:4 AND AT LEAST A STOICHIOMETRIC PROPORTION, BASED ON SAID SILICATE, OF A HYDROLYZABLE ORGANIC CARBONATE ESTER HAVING FROM 3 TO 30 CARBON ATOMS.
Claim 2
Independent Claim
43 words
A METHOD FOR THE PREPARATION OF A FOUNDRY SAND COMPOSITION WHICH COMPRISES UNIFORMLY MIXING A MAJOR PROPORTION OF A FOUNDRY SAND WITH A MINOR PROPORTION OF AN AQUEOUS ALKALI-METAL SILICATE CONTAINING FROM ABOUT 30 TO ABOUT 60 WEIGHT PERCENT SOLIDS AND HAVING A
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |