Patent US2561832A successfully refreshed from Google Patents.
US2561832A
Expired / Lapsed
US
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Safety escape device
Assignee: Individual
•
Filing: 1947-04-17
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Granted: 1951-07-24
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Expires: 1967-04-17
Abstract
No abstract record available.
Inventors
- 👤 Frank R Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/06; A62B1/08; A62B1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US193259A
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US194471A
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US200870A
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US362527A
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US484042A
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US859266A
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US960510A
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US1241701A
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US1631279A
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US2225177A
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US2205026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |