US2905563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal silicate binder for foundry sand molds and process
Assignee: Diamond Shamrock Corp
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Filing: 1956-02-29
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Granted: 1959-09-22
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Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Frank P Ilenda
- 👤 Jr Cletus E Peeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:27
CPC Classifications
B; B22; B22C; B22C9/00; B22C1/00; B22C1/16; B22C1/167; B22C1/18; B22C1/186; B22C1/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METAL CASTING MOLD ADAPTED FOR USE IN CASTING OF HIGH MELTING METALS AND ALLOYS, SAID MOLD BEING FORMED FROM A MIXTURE OF A MAJOR PROPORTION OF ABOUT 90% TO 97% BY WEIGHT OF A FINELY-DIVIDED REFRACTORY AND A MINOR PROPORTION OF ABOUT 3% TO 10% BY WEIGHT OF A LIQUID BINDER COMPRISING IN COMBINATION ABOUT 1 TO 20%, INCLUSIVE, OF A FINELY-DIVIDED WATER-SOLUBLE SOLID ALKALI METAL SILICATE HAVING A ALKALI METAL OXIDE: SILICA RATIO WITHIN THE RANGE OF 2.0:1.0 TO 1.0:3.3, INCLUSIVE, AND ABOUT 80% TO 99% OF A LIQUID ALKALI METAL SILICATE HAVING A SOLIDS CONTENT OF ABOUT 38% TO 46% BY WEIGHT, THE RESULTANT MOLD WHEN IMPREGNATED WITH CARBON, DIOXIDE HAVING AN UNFIRED STRENGTH SUBSTANTIALLY GREATER THAN THAT OBTAINED USING A LIQUID ALKALI METAL SILICATE OF THE SAME TOTAL SOLIDS CONTENT EMPLOYED WITHOUT ADDITION OF THE SAID SOLID ALKALI METAL SILICATE.
Claim 2
Dependent Claim
144 words
A METAL CASTING MOLD ADAPTED FOR USE IN CASTING OF HIGH MELTING METALS AND ALLOYS, SAID MOLD BEING FORMED FROM A MIXTURE OF A MAJOR PROPORTION OF ABOUT 90% TO 97% BY WEIGHT OF A FINELY-DIVIDED REFRACTORY AND A MINOR PROPORTION OF ABOUT 3% TO 10% BY WEIGHT OF A LIQUID BINDER COMPRISING IN COMBINATION ABOUT 1 TO 20%, INCLUSIVE, OF A FINELY-DIVIDED WATER-SOLUBLE SOLID ALKALI METAL SILICATE HAVING A ALKALI METAL OXIDE: SILICA RATIO WITHIN THE RANGE OF 2.0:1.0 TO 1.0:3.3, INCLUSIVE, AND ABOUT 80% TO 99% OF A LIQUID ALKALI METAL SILICATE HAVING A SOLIDS CONTENT OF ABOUT 38% TO 46% BY WEIGHT, THE RESULTANT MOLD WHEN IMPREGNATED WITH CARBON, DIOXIDE HAVING AN UNFIRED STRENGTH SUBSTANTIALLY GREATER THAN THAT OBTAINED USING A LIQUID ALKALI METAL SILICATE OF THE SAME TOTAL SOLIDS CONTENT EMPLOYED WITHOUT ADDITION OF THE SAID SOLID ALKALI METAL SILICATE.
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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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |