US3667608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing oil spills from the surface of a body of water
Assignee: Calgon Corp
•
Filing: 1970-04-24
•
Granted: 1972-06-06
•
Expires: 1990-04-24
Abstract
Abstract Oil is removed from contaminated water by means of a fibrous structure of low denier polyolefin fibers attached to a pumping system. The polyolefin fiber structure can absorb many times its own weight of oil while absorbing little or no water. The oil is then easily removed from the fibrous structure by pumping.
Inventors
- 👤 Ralph H Burroughs
- 👤 Paul R Cox Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:23
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; A; A47; A47L; A47L13/00; A47L13/10; A47L13/20; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
The apparatus of claim 1 in which the coherent fibrous polyolefin structure is prepared from polypropylene fibers.
Claim 2
Dependent Claim
13 words
The apparatus of claim 2 in which the polypropylene fibers are crimped fibers.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 in which the pumping fittings are prepared from a synthetic plastic having a specific gravity less than water.
References Cited (Backward Citations)
US2711828A
Cited
US2788125A
Cited
US3093583A
Cited
US3096204A
Cited
US3246766A
Cited
US3263811A
Cited
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 |