US2585458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Game apparatus for teaching the use of the multiplication table
Assignee: Individual
•
Filing: 1949-10-11
•
Granted: 1952-02-12
•
Expires: 1969-10-11
Abstract
No abstract record available.
Inventors
- 👤 Julia E I Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:56
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US445016A
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US491293A
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US535535A
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US846110A
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US1217908A
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US1470872A
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US1719108A
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US1935308A
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US2073551A
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US2410845A
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US2472439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |