US3143499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High skim rate swimming pool filter
Assignee: TDY Industries LLC
•
Filing: 1960-05-16
•
Granted: 1964-08-04
•
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 15:46
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
Cited
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 |