Patent US4876004A successfully refreshed from Google Patents.
US4876004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Topological separator
Assignee: Shell Canada Ltd
•
Filing: 1988-05-16
•
Granted: 1989-10-24
•
Expires: 2008-05-16
Abstract
Abstract An apparatus is provided for removing a floating pollutant such as oil from a liquid such as water by passing the oil and water over the top of a weir and allowing the oil and water to fall between a side of the weir and a baffle closely adjacent to the weir and extending into a pool at the bottom of the weir. Oil collects in a quiet area adjacent the baffle while the water passes over a subsequent weir to removal.
Inventors
- 👤 Abraham Verhoeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:44
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D17/00; B01D17/02; B01D17/0208; B01D19/0021; E; E02; E02B; E02B15/00; E02B15/04; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
184 words
Apparatus for collecting a floating pollutant on a liquid surface comprising a weir dam having an upstream side and a sloped downstream side; a first pollutant impermeable baffle closely adjacent to the downstream side of the weir dam; a pool of liquid on the downstream side of said weir dam, said baffle partly extending into the top of the pool of liquid; means for flowing the pollutant and liquid over the weir dam, said baffle partly extending into the top of the pool of liquid; means for flowing the pollutant and liquid over the weir dam, then between the sloped downstream side of the weir dam and the pollutant impermeable baffle and into the pool; a second pollutant impermeable baffle extending into the top of the pool downstream of the first baffle and functionable to collect pollutant between the two baffles; a second weir dam having sloped upstream and downstream sides and being located downstream of the second baffle, the top of the second weir dam being below the top of the first weir dam; and the two dams having a contoured bottom therebetween.
Claim 2
Dependent Claim
184 words
Apparatus for collecting a floating pollutant on a liquid surface comprising a weir dam having an upstream side and a sloped downstream side; a first pollutant impermeable baffle closely adjacent to the downstream side of the weir dam; a pool of liquid on the downstream side of said weir dam, said baffle partly extending into the top of the pool of liquid; means for flowing the pollutant and liquid over the weir dam, said baffle partly extending into the top of the pool of liquid; means for flowing the pollutant and liquid over the weir dam, then between the sloped downstream side of the weir dam and the pollutant impermeable baffle and into the pool; a second pollutant impermeable baffle extending into the top of the pool downstream of the first baffle and functionable to collect pollutant between the two baffles; a second weir dam having sloped upstream and downstream sides and being located downstream of the second baffle, the top of the second weir dam being below the top of the first weir dam; and the two dams having a contoured bottom therebetween.
Claim 3
Dependent Claim
36 words
The apparatus of claim 1 wherein another baffle is located extending into the top of the pool downstream of the other baffle, and said means for withdrawing pollutant from the pool is located between the baffles.
References Cited (Backward Citations)
DE138644C
Cited
US1077308A
Cited
DE547608C
Cited
GB443601A
Cited
US2071320A
Cited
US2484277A
Cited
FR1466054A
Cited
US3820954A
Cited
US3779385A
Cited
US3815742A
Cited
US3933654A
Cited
US3823828A
Cited
DE2602123A1
Cited
US4116789A
Cited
US4202778A
Cited
US4209388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |