US2451475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual tube pneumatic life preserver belt
Assignee: Individual
•
Filing: 1942-07-30
•
Granted: 1948-10-19
•
Expires: 1962-07-30
Abstract
No abstract record available.
Inventors
- 👤 Edward C Craig
- 👤 Lloyd A Straits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:23
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/13; B63C9/15; B63C9/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191502104A
Cited
GB110668A
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US1412803A
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US1425475A
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US1707182A
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US1609677A
Cited
US1870535A
Cited
US1798430A
Cited
US1932585A
Cited
US2084636A
Cited
US2128423A
Cited
US2165300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |