Patent US2512837A successfully refreshed from Google Patents.
US2512837A
Expired / Lapsed
US
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Educational device
Assignee: Individual
•
Filing: 1946-03-19
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Granted: 1950-06-27
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Expires: 1966-03-19
Abstract
No abstract record available.
Inventors
- 👤 Igino P Pescatori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:34
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/02; G09B19/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR459863A
Cited
US1400887A
Cited
DE381787C
Cited
US1617272A
Cited
US1618952A
Cited
US2085881A
Cited
US2198894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |