US2970326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self operated emergency life saving device
Assignee: Individual
•
Filing: 1958-06-02
•
Granted: 1961-02-07
•
Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Robert P Keefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:50
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/13; B63C9/15; B63C9/155; B63C9/18; B63C2009/133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US752654A
Cited
US1226857A
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US1707182A
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US1621458A
Cited
US2165300A
Cited
US2202415A
Cited
US2202225A
Cited
US2210809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |