Patent US3222700A successfully refreshed from Google Patents.
US3222700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable liferafts
Assignee: P Frankenstein and Sons Manchester Ltd
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Filing: 1964-06-01
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Granted: 1965-12-14
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Smith Rex Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:37
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/22; B63C9/02; B63C9/04; B63C2009/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A LIFERAF COMPRISING, AN ENDLESS, INFLATABLE TUBULAR GUNWALE OF OVAL SHAPE PROVIDED WITH A FLEXIBLE IMPERMEABLE FLOOR UNITED TO THE GUNWALE, TWO PARALLEL, INFLATABLE, UPSTANDING, SPACED-APART TUBULAR CURVED ARCHES EXTENDING ON A CURVED LINE FROM ONE SIDE OF THE GUNWALE TO ITS OPPOSITE SIDE, TWO STRAIGHT, INFLATABLE BRACING TUBES EXTENDING IN PARALLELISM FROM ONE OF THE ARCHES TO THE OTHER AND MAINTAINING THE ARCHES IN THEIR SPACED-APART RELATION AND WITH THE DISTANCE BETWEEN THEM BEING SUBSTANTIALLY UNIFORM FROM THEIR POINTS OF JOINDER TO THE GUNWALES TO THEIR UPPER ENDS, AND A FLEXIBLE CANOPY MARGINALLY UNITED TO THE GUNWALE AND SUPPORTED BY THE INFLATED ARCHES AND THEIR STRAIGHT BRACING TUBES.
Claim 2
Dependent Claim
109 words
A LIFERAF COMPRISING, AN ENDLESS, INFLATABLE TUBULAR GUNWALE OF OVAL SHAPE PROVIDED WITH A FLEXIBLE IMPERMEABLE FLOOR UNITED TO THE GUNWALE, TWO PARALLEL, INFLATABLE, UPSTANDING, SPACED-APART TUBULAR CURVED ARCHES EXTENDING ON A CURVED LINE FROM ONE SIDE OF THE GUNWALE TO ITS OPPOSITE SIDE, TWO STRAIGHT, INFLATABLE BRACING TUBES EXTENDING IN PARALLELISM FROM ONE OF THE ARCHES TO THE OTHER AND MAINTAINING THE ARCHES IN THEIR SPACED-APART RELATION AND WITH THE DISTANCE BETWEEN THEM BEING SUBSTANTIALLY UNIFORM FROM THEIR POINTS OF JOINDER TO THE GUNWALES TO THEIR UPPER ENDS, AND A FLEXIBLE CANOPY MARGINALLY UNITED TO THE GUNWALE AND SUPPORTED BY THE INFLATED ARCHES AND THEIR STRAIGHT BRACING TUBES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |