US2611261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building block construction
Assignee: Individual
•
Filing: 1948-03-16
•
Granted: 1952-09-23
•
Expires: 1968-03-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:51
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/28; E04B2/42; E04B2002/0295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390175A
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US753491A
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US1682360A
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US776409A
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US836017A
Cited
US1063658A
Cited
US1411005A
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US2060701A
Cited
US2205829A
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US2150809A
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US2199946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |