US2491006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of conditioning foundry sand
Assignee: Eastern Clay Products Inc
•
Filing: 1947-08-15
•
Granted: 1949-12-13
•
Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
- 👤 Grube Kenneth Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:12
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US947129A
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US973574A
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US1127523A
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US1343680A
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US2159952A
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US2281505A
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US2328622A
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US2430655A
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US2444413A
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US2432702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |