Patent US2557693A successfully refreshed from Google Patents.
US2557693A
Expired / Lapsed
US
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Adjustable concrete form spreader
Assignee: Individual
•
Filing: 1946-06-27
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Granted: 1951-06-19
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Expires: 1966-06-27
Abstract
No abstract record available.
Inventors
- 👤 Harold G Sachleben
- 👤 Sachleben Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:16
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/18; E04G11/00; E04G11/36; E04G11/40; E04G11/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US662162A
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US634671A
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US918699A
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US883859A
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US975241A
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US1627009A
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US1652056A
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US1888181A
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US1882006A
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US2218820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |