Patent US2798266A successfully refreshed from Google Patents.
US2798266A
Expired / Lapsed
US
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Core and mold blowing method and apparatus
Assignee: FED FOUNDRY SUPPLY CO
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Filing: 1953-08-03
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Granted: 1957-07-09
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Heinrich J B Herbruggen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:33
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1030326A
Cited
US2272816A
Cited
US2437831A
Cited
US2543598A
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GB655539A
Cited
US2656575A
Cited
US2636230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |