US2900742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational game for teaching spelling
Assignee: Individual
•
Filing: 1956-04-05
•
Granted: 1959-08-25
•
Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Lylliard B Barker
- 👤 Baker Harold Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
G; G09; G09B; G09B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1168949A
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US1085405A
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US1084370A
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US1110434A
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US1273763A
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US1394620A
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US1428456A
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US2524548A
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US2612708A
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US2722754A
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |