Patent US818512A successfully refreshed from Google Patents.
Patent US3252173A successfully refreshed from Google Patents.
US3252173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously extensible and roll-up structure
Assignee: Individual
•
Filing: 1963-12-11
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Granted: 1966-05-24
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Expires: 1983-12-11
Abstract
No abstract record available.
Inventors
- 👤 Eli I Robinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:52
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/005; E01; E01D; E01D15/00; E01D15/14; E01D15/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PORTABLE FLOATING STRUCTURE COMPRISING A CONTINUOUS STRIP OF THIN RESILIENT MATERIAL FORMED WITH THE LONGITUDINAL EDGES COILED TRANSVERSELY TO FORM A SEALABLE TUBE ALONG EACH LATERAL EDGE TO PROVIDE FLUID TIGHT BUOYANCY CHAMBERS AND LONGITUDINAL RIGIDITY, SAID TUBES BEING CAPABLE OF UNCOILING WHEN SAID STRIP IS ROLLED UP TO FORM A CYLINDER, A LAMINA OF CORRUGATED MATERIAL FIXED TO THE RESILIENT STRIP BETWEEN THE TUBES, SAID LAMINA PROVIDTING TRANSVERSE RIGIDITY AND BEING CAPABLE OF BEING ROLLED LONGITUDINALLY WITH SAID STRIP WHEN ROLLED UP AND AN END CAP AT THE END OF THE STRUCTURE IN SEALING ENGAGEMENT WITH THE END OF EACH OF SAID TUBES TO FORM A WATER FREE COMPARTMENT.
Claim 2
Dependent Claim
111 words
A PORTABLE FLOATING STRUCTURE COMPRISING A CONTINUOUS STRIP OF THIN RESILIENT MATERIAL FORMED WITH THE LONGITUDINAL EDGES COILED TRANSVERSELY TO FORM A SEALABLE TUBE ALONG EACH LATERAL EDGE TO PROVIDE FLUID TIGHT BUOYANCY CHAMBERS AND LONGITUDINAL RIGIDITY, SAID TUBES BEING CAPABLE OF UNCOILING WHEN SAID STRIP IS ROLLED UP TO FORM A CYLINDER, A LAMINA OF CORRUGATED MATERIAL FIXED TO THE RESILIENT STRIP BETWEEN THE TUBES, SAID LAMINA PROVIDTING TRANSVERSE RIGIDITY AND BEING CAPABLE OF BEING ROLLED LONGITUDINALLY WITH SAID STRIP WHEN ROLLED UP AND AN END CAP AT THE END OF THE STRUCTURE IN SEALING ENGAGEMENT WITH THE END OF EACH OF SAID TUBES TO FORM A WATER FREE COMPARTMENT.
References Cited (Backward Citations)
US2905282A
Cited
US3144104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |