Patent US2075235A successfully refreshed from Google Patents.
Patent US3667235A successfully refreshed from Google Patents.
US3667235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible barrier for substances floating on water
Assignee: Individual
•
Filing: 1971-04-27
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Granted: 1972-06-06
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Expires: 1991-04-27
Abstract
Abstract A barrier for substances floating on water having a flotation member and a liquid pervious and a liquid impervious skirt depending therefrom. The liquid impervious skirt is deflected at currents greater than about one knot and the oily substances are treated with a particulate oleophilic-hydrophobic substance less dense than water for retention by said liquid pervious skirt.
Inventors
- 👤 Paul Preus
- 👤 John J Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:42
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/06; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A barrier in accordance with claim 1 wherein two of said liquid permeable skirts depend from said flotation means and said liquid impermeable skirt is disposed therebetween.
Claim 2
Dependent Claim
19 words
A barrier in accordance with claim 1 wherein said liquid impermeable skirt is coextensive with said liquid permeable skirt.
Claim 3
Dependent Claim
43 words
A barrier in accordance with claim 1 further comprising a particulate oleophilic-hydrophobic material disposed in the water on the upstream side of said barrier, said material having a greater effective particle size than the openings providing liquid perviousness in said liquid pervious skirt.
Claim 4
Dependent Claim
20 words
A barrier in accordance with claim 1 wherein said liquid permeable skirt comprises a net of about one-quarter inch mesh.
Claim 5
Dependent Claim
18 words
A barrier in accordance with claim 1 wherein said liquid impermeable skirt comprises a mat of oleophilic-hydrophobic material.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |