Patent US3546807A successfully refreshed from Google Patents.
US3546807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toy building set with interfitting frames and blocks
Assignee: Individual
•
Filing: 1968-12-05
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Granted: 1970-12-15
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Expires: 1988-12-05
Abstract
No abstract record available.
Inventors
- 👤 August Wilheim Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:28
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63H33/06; A63H33/08; A63H33/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732384A
Cited
US1894061A
Cited
US2093341A
Cited
US2780028A
Cited
FR1212875A
Cited
FR1311992A
Cited
US3284946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |