US2949375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siliceous casting cores
Assignee: ChampionX LLC
•
Filing: 1957-08-20
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Granted: 1960-08-16
•
Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Reuter Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:17
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
THE PROCESS OF PRODUCING A SILICEOUS CASTING CORE WHICH COMPRISES THE STEPS OF BLENDING A FOUNDRY SAND WITH FROM 0.1% TO 50% BY WEIGHT OF A SILICA FLOUR HAVING A U.S SIEVE SIZE OF AT LEAST 80, ADJUSTING THE MOISTURE CONTENT OF SUCH MIXTURE TO FROM 0.5% TO 8% BY WEIGHT BY THE ADDITION THERETO OF AT LEAST 0.5% TO 8% BY WEIGHT AQUEOUS COLLOIDAL SILICA SOL WHICH HAS A SILICA CONTENT OF FROM 15% TO 18.5% SILICA AS SIO2, A CONDUCTIVITY OF AT LEAST 1800 MICROMHOS, A PH OF FROM 8.4 TO 10 AND A SPECIFIC GRAVITY OF AT LEAST 1.047 AT 68*F., AND THEN FORMING THESE INGREDIENTS INTO A CORE.
Claim 2
Dependent Claim
112 words
THE PROCESS OF PRODUCING A SILICEOUS CASTING CORE WHICH COMPRISES THE STEPS OF BLENDING A FOUNDRY SAND WITH FROM 0.1% TO 50% BY WEIGHT OF A SILICA FLOUR HAVING A U.S SIEVE SIZE OF AT LEAST 80, ADJUSTING THE MOISTURE CONTENT OF SUCH MIXTURE TO FROM 0.5% TO 8% BY WEIGHT BY THE ADDITION THERETO OF AT LEAST 0.5% TO 8% BY WEIGHT AQUEOUS COLLOIDAL SILICA SOL WHICH HAS A SILICA CONTENT OF FROM 15% TO 18.5% SILICA AS SIO2, A CONDUCTIVITY OF AT LEAST 1800 MICROMHOS, A PH OF FROM 8.4 TO 10 AND A SPECIFIC GRAVITY OF AT LEAST 1.047 AT 68*F., AND THEN FORMING THESE INGREDIENTS INTO A CORE.
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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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |