Patent US5717870A successfully refreshed from Google Patents.
US2887261A
Expired / Lapsed
US
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Collapsible fire escape ladder
Assignee: Individual
•
Filing: 1957-11-15
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Granted: 1959-05-19
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Expires: 1977-11-15
Abstract
No abstract record available.
Inventors
- 👤 Roy L Mcguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:28
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/52; E06C1/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US312254A
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US657735A
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US1133722A
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US1424115A
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US2188178A
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US2206753A
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US2211259A
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US2618684A
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GB719057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |