US2875531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device of interlocked puzzle pieces
Assignee: Individual
•
Filing: 1955-02-28
•
Granted: 1959-03-03
•
Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Mansfield Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
A; A63; A63F; A63F9/00; A63F9/06; A63F9/10; A63F9/1044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1359115A
Cited
US1604127A
Cited
US2310800A
Cited
FR987493A
Cited
US2483833A
Cited
US2481109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |