Patent US3565257A successfully refreshed from Google Patents.
US3565257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating barrier for water pollutants
Assignee: Individual
•
Filing: 1969-12-05
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Granted: 1971-02-23
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Expires: 1989-12-05
Abstract
Abstract The barrier for arresting, confining and absorbing water pollutants in suspension therein, such as tankers, discharged fluids, consists of a preferably cylindrical body containing a central propylene fiber rope surrounded in succession by a layer of polystyrene (blocks or granules), a layer of a mixture of propylene staples or waste and polystyrene granules, contained in a netting of propylene fiber, and a final layer of propylene staples or waste also contained in a netting. The barrier is floating so as to keep about one-half of its volume above the surface of the water.
Inventors
- 👤 Cesare Cavalieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:33
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/06; C; C02; C02F; C02F1/00; C02F1/68; C02F1/681
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
The barrier of claim 1, wherein said first layer is selected from the group consisting of monolythic blocks of polystyrene and granular polystyrene.
Claim 2
Dependent Claim
41 words
The barrier of claim 1, wherein the elements thereof are so assembled that some elements are pollutant-absorbers, while others are waterproof, the combination of said elements being such that said barrier is submerged only with about one half of its volume.
References Cited (Backward Citations)
US2228529A
Cited
US3221884A
Cited
FR1357278A
Cited
US3259688A
Cited
DE1214493B
Cited
US3507741A
Cited
US3508663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |