US2883723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improved silicate bonded foundry molds and cores
Assignee: Meehanite Metal Corp
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Filing: 1956-11-20
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Granted: 1959-04-28
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Expires: 1976-11-20
Abstract
No abstract record available.
Inventors
- 👤 William H Moore
- 👤 Jr Walter E Gruver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:22
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE PROCESS OF MAKING A CASTING IN FOUNDRY MOLDS CONSISTING OF SELECTING A SAND MIXTURE CONTAINING A BINDER SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATE AND TO WHICH HAS BEEN ADDED FROM 0.1 TO 1.0 PERCENT MAGNESIUM OXIDE, PREPARING SAID MOLD FROM SAID MIXTURE, HARDENING SAID MOLD BY THE APPLICATION OF EXTERNALLY PRODUCED CARBON DIOXIDE GAS, AND CASTING MOLTEN METAL INTO SAID MOLD, SAID MAGNESIUM OXIDE ACTING TO IMPROVE THE COLLAPSIBILTY OF SAID MOLD.
Claim 2
Dependent Claim
77 words
THE PROCESS OF MAKING A CASTING IN FOUNDRY MOLDS CONSISTING OF SELECTING A SAND MIXTURE CONTAINING A BINDER SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATE AND TO WHICH HAS BEEN ADDED FROM 0.1 TO 1.0 PERCENT MAGNESIUM OXIDE, PREPARING SAID MOLD FROM SAID MIXTURE, HARDENING SAID MOLD BY THE APPLICATION OF EXTERNALLY PRODUCED CARBON DIOXIDE GAS, AND CASTING MOLTEN METAL INTO SAID MOLD, SAID MAGNESIUM OXIDE ACTING TO IMPROVE THE COLLAPSIBILTY OF SAID MOLD.
References Cited (Backward Citations)
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Cited
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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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |