Patent US3143499A successfully refreshed from Google Patents.
US3143499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High skim rate swimming pool filter
Assignee: TDY Industries LLC
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Filing: 1960-05-16
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Granted: 1964-08-04
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 Avy L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:46
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; Y; Y10; Y10S; Y10S210/00; Y10S210/13
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A FILTER SYSTEM FOR A SWIMMING POOL COMPRISING A COARSE FILTER; MEANS FEEDING WATER FROM ADJACENT THE TOP OF THE POOL IN A RELATIVELY LARGE QUANTITY TO SAID COARSE FILTER; A FINE FILTER; MEANS PASSING A SMALLER QUANTITY OF SAID COARSE FILTERED WATER THROUGH SAID FINE FILTER; MEANS INJECTING SAID FINE FILTERED WATER THROUGH SAID COARSE FILTERED WATER TO INSERT A PORTION OF THE LATTER DIRECTLY BACK INTO THE POOL; AND MEANS DIRECTING THE COMBINED COARSE AND FINE FILTERED WATER INTO THE POOL IN A DIRECTION TO MOVE THE TOP OF THE POOL WATER TOWARD THE COARSE FILTER TO CARRY FLOATING DEBRIS THERETO.
References Cited (Backward Citations)
US2004825A
Cited
US2247116A
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US2502052A
Cited
US2754005A
Cited
US2914180A
Cited
US2968404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |