US2848338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry sand additive
Assignee: Individual
•
Filing: 1953-03-06
•
Granted: 1958-08-19
•
Expires: 1973-03-06
Abstract
No abstract record available.
Inventors
- 👤 Harry H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:23
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A FOUNDRY CORE SAND COMPRISING A MECHANICAL MIXTURE OF ABOUT 98.5% TO 99.5% SAND AND BINDER MIX AND ABOUT 0.5% TO 1.5% OF AN ADDITIVE COMPOSITION CAPABLE OF COMPLETELY COATING THE INDIVIDUAL SAND GRAINS, SAID ADDITIVE COMPOSITION COMPRISING ABOUT 70% TO 75% OF POWDERED CHARCOAL HAVING A PARTICLE SIZE IN THE RANGE OF 80 TO 200 MESH AND ABOUT 25% TO 30% OF FUEL OIL HAVING A FLASH POINT IN THE RANGE OF 120*F. TO 180*F.
Claim 2
Dependent Claim
76 words
A FOUNDRY CORE SAND COMPRISING A MECHANICAL MIXTURE OF ABOUT 98.5% TO 99.5% SAND AND BINDER MIX AND ABOUT 0.5% TO 1.5% OF AN ADDITIVE COMPOSITION CAPABLE OF COMPLETELY COATING THE INDIVIDUAL SAND GRAINS, SAID ADDITIVE COMPOSITION COMPRISING ABOUT 70% TO 75% OF POWDERED CHARCOAL HAVING A PARTICLE SIZE IN THE RANGE OF 80 TO 200 MESH AND ABOUT 25% TO 30% OF FUEL OIL HAVING A FLASH POINT IN THE RANGE OF 120*F. TO 180*F.
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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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |