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US3546792A
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Interlocking modular design blocks
Assignee: Individual
•
Filing: 1968-06-10
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Granted: 1970-12-15
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Expires: 1988-06-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:43
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63H33/06; A63H33/08; A63H33/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190601154A
Cited
GB420349A
Cited
US2147237A
Cited
US2377100A
Cited
US2623303A
Cited
FR1219634A
Cited
US3410021A
Cited
US3449857A
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 |