US2931129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational construction kit
Assignee: Individual
•
Filing: 1955-08-15
•
Granted: 1960-04-05
•
Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Boniface
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63H33/10; A63H33/101; F; F16; F16B; F16B2200/00; F16B2200/67; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/347; Y10T403/44; Y10T403/447; Y10T403/46; Y10T403/4602
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE268875C
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US2733065A
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US1973536A
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US2063895A
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US2112247A
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US2218175A
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US2455266A
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FR1035978A
Cited
US2682118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |