US2741908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precast concrete wall construction
Assignee: Individual
•
Filing: 1950-03-17
•
Granted: 1956-04-17
•
Expires: 1970-03-17
Abstract
No abstract record available.
Inventors
- 👤 William E Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:28
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/044; E04C2/30; E04C2/38; E04C2/382
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1401624A
Cited
US1375955A
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US1462622A
Cited
US1495896A
Cited
US1597167A
Cited
US2043697A
Cited
US2065433A
Cited
US2124430A
Cited
US2560731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |