Patent US2549707A successfully refreshed from Google Patents.
US2549707A
Expired / Lapsed
US
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Fire escape
Assignee: Individual
•
Filing: 1948-05-17
•
Granted: 1951-04-17
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Expires: 1968-05-17
Abstract
No abstract record available.
Inventors
- 👤 Philo G Plummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:12
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US285301A
Cited
US358322A
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US598294A
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US1077781A
Cited
US1392660A
Cited
USRE16582E
Cited
US2064779A
Cited
US2226188A
Cited
US2439356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |