Patent US1526069A successfully refreshed from Google Patents.
US1526069A
Expired / Lapsed
US
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Reenforced-concrete slab
Assignee: IRVING IRON WORKS CO
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Filing: 1924-04-01
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Granted: 1925-02-10
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Expires: 1944-04-01
Abstract
No abstract record available.
Inventors
- 👤 Walter E Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:59
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/421; E04C2/426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-02-10 | 1928-08-11 | 1929-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-02-10 | 1932-08-11 | 1933-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-02-10 | 1936-08-11 | 1937-02-10 | $7700.00 | Window Closed / Lapsed |