Patent US2680593A successfully refreshed from Google Patents.
US2680593A
Expired / Lapsed
US
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Escape device
Assignee: Individual
•
Filing: 1950-02-07
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Granted: 1954-06-08
•
Expires: 1970-02-07
Abstract
No abstract record available.
Inventors
- 👤 William D Mcintyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:22
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)
US421269A
Cited
US514543A
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US633357A
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US766172A
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US1144702A
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US1631279A
Cited
US1766566A
Cited
US1775736A
Cited
US2252998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |