Patent US3811477A successfully refreshed from Google Patents.
US3811477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buoyant liquid-conveying hose
Assignee: Uniroyal Ltd Great Britain
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Filing: 1972-12-13
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Granted: 1974-05-21
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Expires: 1992-12-13
Abstract
Abstract A buoyant liquid-conveying hose in which a hose body is surrounded by a first layer of buoyancy material with a second layer of different buoyancy material surrounding the first layer and a water-impermeable covering over the second layer. The compression modulus of the buoyancy material of the first layer is greater than that of the second layer.
Inventors
- 👤 C Thawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:20
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/133
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A hose which is buoyant when full of water comprising a hose body comprising elastomeric material, a first layer of expanded buoyancy material surrounding said hose body, a second layer of different buoyancy material surrounding said first layer and a water-impermeable covering over said second layer, the compression modulus of said buoyancy material of said first layer being greater than that of said second layer.
Claim 2
Dependent Claim
65 words
A hose which is buoyant when full of water comprising a hose body comprising elastomeric material, a first layer of expanded buoyancy material surrounding said hose body, a second layer of different buoyancy material surrounding said first layer and a water-impermeable covering over said second layer, the compression modulus of said buoyancy material of said first layer being greater than that of said second layer.
Claim 3
Dependent Claim
20 words
A hose in accordance with claim 1 in which said first layer of buoyancy material is an expanded plastic material.
Claim 4
Dependent Claim
19 words
A hose in accordance with claim 1 in which said first layer of buoyancy material is expanded crosslinked polyethylene.
Claim 5
Dependent Claim
30 words
A hose in accordance with claim 3 in which said polyethylene layer has a density in the range from 1.5 pounds per cubic foot to 10 pounds per cubic foot.
Claim 6
Dependent Claim
20 words
A hose in accordance with claim 1 in which said second layer of buoyancy material is a closed-cell expanded rubber.
Claim 7
Dependent Claim
30 words
A hose in accordance with claim 5 in which said rubber layer has a density in the range from 6 pounds per cubic foot to 15 pounds per cubic foot.
References Cited (Backward Citations)
US3119415A
Cited
US3548884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |