Patent US2977688A successfully refreshed from Google Patents.
US2977688A
Expired / Lapsed
US
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Educational cubic toy device
Assignee: Individual
•
Filing: 1959-10-05
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Granted: 1961-04-04
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Expires: 1979-10-05
Abstract
No abstract record available.
Inventors
- 👤 Redey George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:07
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/02; G09B23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US364845A
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US415371A
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US1479147A
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US1656199A
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US1845240A
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US2372843A
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US2335941A
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GB673326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |