US2528792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooved game board for spherical play pieces
Assignee: Individual
•
Filing: 1947-04-29
•
Granted: 1950-11-07
•
Expires: 1967-04-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Seaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:35
CPC Classifications
A; A63; A63F; A63F7/00; A63F7/0076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US429250A
Cited
US603539A
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US1311810A
Cited
US818582A
Cited
US1030521A
Cited
US1335511A
Cited
US1396425A
Cited
US1683860A
Cited
US1700016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |