Patent US2964858A successfully refreshed from Google Patents.
US2964858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational game
Assignee: Individual
•
Filing: 1960-01-11
•
Granted: 1960-12-20
•
Expires: 1980-01-11
Abstract
No abstract record available.
Inventors
- 👤 Kathleen A Rutherford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:35
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/06; A; A63; A63F; A63F9/00; A63F9/0098
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1257655A
Cited
US1359646A
Cited
US1428456A
Cited
US1480458A
Cited
US2585924A
Cited
US2825150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |