Patent US3285360A successfully refreshed from Google Patents.
Patent US3363766A successfully refreshed from Google Patents.
US3363766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool apparatus
Assignee: SYLVAN POOLS Inc
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Filing: 1964-06-22
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Granted: 1968-01-16
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Broek William A Van Den
- 👤 Silverman Ira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:19
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/12; B01D24/46; B01D24/4631; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D35/00; B01D35/18; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A SWIMMING POOL FILTER-HEATER COMBINATION COMPRISING A DIATOMACEOUS EARTH FILTER HAVING A PLURALITY OF SEPARATE FILTER ELEMENTS, A DIRECT FIRED WATER HEATER MOUNTED CONCENTRICALLY WITH RESPECT TO SAID FILTER AND IN DIRECT HEAT EXCAHNGE RELATIONSHIP THEREWITH, SAID HEATER INCLUDING A COMBUSTION CHAMBER AND A CHIMMEY; CONDUIT MEANS CONNECTING A HEATER TO A POOL, CONDUIT MEANS CONNECTING SAID HEATER TO SAID FILTER FOR CONDUCTING WATER
Claim 2
Dependent Claim
64 words
A SWIMMING POOL FILTER-HEATER COMBINATION COMPRISING A DIATOMACEOUS EARTH FILTER HAVING A PLURALITY OF SEPARATE FILTER ELEMENTS, A DIRECT FIRED WATER HEATER MOUNTED CONCENTRICALLY WITH RESPECT TO SAID FILTER AND IN DIRECT HEAT EXCAHNGE RELATIONSHIP THEREWITH, SAID HEATER INCLUDING A COMBUSTION CHAMBER AND A CHIMMEY; CONDUIT MEANS CONNECTING A HEATER TO A POOL, CONDUIT MEANS CONNECTING SAID HEATER TO SAID FILTER FOR CONDUCTING WATER
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |