US2911818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking building blocks
Assignee: Individual
•
Filing: 1955-11-10
•
Granted: 1959-11-10
•
Expires: 1975-11-10
Abstract
No abstract record available.
Inventors
- 👤 Smith Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:49
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/16; E04B2/18; E04C; E04C3/00; E04C3/02; E04B2002/0202; E04B2002/0204; E04B2002/0215; E04B2002/0217; E04C2003/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR963760A
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US1305230A
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US811534A
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US829711A
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US1391352A
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US1418168A
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US1468945A
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US1689107A
Cited
US1805538A
Cited
DE575796C
Cited
US2351768A
Cited
FR929625A
Cited
US2610503A
Cited
US2459028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |