Patent US2841840A successfully refreshed from Google Patents.
US2841840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic apparatus for removing core arbors from foundry flasks
Assignee: Individual
•
Filing: 1954-08-13
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Granted: 1958-07-08
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Expires: 1974-08-13
Abstract
No abstract record available.
Inventors
- 👤 William G Reichert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:06
CPC Classifications
B; B22; B22C; B22C19/00
Claims Analysis
Total Claims: 0
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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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |