Patent US1333345A successfully refreshed from Google Patents.
US2798653A
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US
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Extensible ladder
Assignee: Fairchild Engine and Airplane Corp
•
Filing: 1951-10-23
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Granted: 1957-07-09
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Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Morrow David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:06
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/52; E06C1/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2367253A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |