US3868319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for removing oil from swimming pools
Assignee: Individual
•
Filing: 1973-10-23
•
Granted: 1975-02-25
•
Expires: 1993-10-23
Abstract
Abstract A method and apparatus for removing an oil film from the surface of the water in a swimming pool by placing material that is preferentially absorptive of the oil in the system in which the pool water is circulated so that the oil is absorbed by the material as the material is contacted by the water during the course of its circulation.
Inventors
- 👤 Gerall A Black
- 👤 Edward C Straub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:30
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; E03F5/16; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/08; B01D17/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
In combination with a pool having a recirculating filter system including an entrance passage thereinto, a pump, and a strainer basket between said passage in said pump, the improvement comprising pads preferentially absorptive of oil and floatable upon the surface of water, said pads being located in said entrance passage and upstream of said strainer basket, whereby oil floating on the surface of water being recirculated through said filter system is absorbed from the surface thereof by said pads floating on said surface.
Claim 2
Dependent Claim
83 words
In combination with a pool having a recirculating filter system including an entrance passage thereinto, a pump, and a strainer basket between said passage in said pump, the improvement comprising pads preferentially absorptive of oil and floatable upon the surface of water, said pads being located in said entrance passage and upstream of said strainer basket, whereby oil floating on the surface of water being recirculated through said filter system is absorbed from the surface thereof by said pads floating on said surface.
Claim 3
Dependent Claim
27 words
The structure of claim 1 in which the total perimeter of the pads is large compared with the perimeter of a single pad having their total area.
Claim 4
Independent Claim
72 words
THE METHOD OF REMOVING OIL FROM THE SURFACE OF A BODY OF WATER IN A POOL HAVING A RECIRCULATING FILTER SYSTEM INCLUDING AN ENTRANCE PASSAGE THEREINTO, A PUMP, AND A STRAINER BASKET BETWEEN SAID PASSAGE AND SAID PUMP, SAID METHOD COMPRISING THE STEP OF LOCATING PADS PREFERENTIALLY ABSORPTIVE OF OIL AND FLOATABLE UPON THE SURFACE OF WATER WITHIN THE ENTRANCE PASSAGE ON THE SIDE OF THE BASKET WAY FROM THE PUMP, WHEREBY
Claim 5
Independent Claim
72 words
THE METHOD OF REMOVING OIL FROM THE SURFACE OF A BODY OF WATER IN A POOL HAVING A RECIRCULATING FILTER SYSTEM INCLUDING AN ENTRANCE PASSAGE THEREINTO, A PUMP, AND A STRAINER BASKET BETWEEN SAID PASSAGE AND SAID PUMP, SAID METHOD COMPRISING THE STEP OF LOCATING PADS PREFERENTIALLY ABSORPTIVE OF OIL AND FLOATABLE UPON THE SURFACE OF WATER WITHIN THE ENTRANCE PASSAGE ON THE SIDE OF THE BASKET WAY FROM THE PUMP, WHEREBY
Claim 6
Dependent Claim
27 words
The method of claim 3 in which the total perimeter of the pads is large compared with the perimeter of a single pad having their total area.
References Cited (Backward Citations)
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US3630891A
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US3669275A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |