Patent US2954616A successfully refreshed from Google Patents.
US2954616A
Expired / Lapsed
US
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Underlay for puzzles, etc., used for educational purposes
Assignee: Individual
•
Filing: 1956-05-24
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Granted: 1960-10-04
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Expires: 1976-05-24
Abstract
No abstract record available.
Inventors
- 👤 Mogard Bror Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:13
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191210653A
Cited
US1615077A
Cited
US1604127A
Cited
US1987496A
Cited
US2007530A
Cited
GB650175A
Cited
US2693963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |