Patent US3784012A successfully refreshed from Google Patents.
US3784012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Septic tank construction
Assignee: Individual
•
Filing: 1972-03-31
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Granted: 1974-01-08
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Expires: 1992-03-31
Abstract
Abstract Precast concrete septic tank constructions and their assembly with leaching pools are disclosed wherein important economies in construction are obtained as well as improved efficiency and better access. In its preferred form the septic tank is supported inside the leaching pool from the top of the wall thereof, the wall being made of sanitary drain rings which provide rows of apertures for diffusion of effluent into the surrounding earth.
Inventors
- 👤 H Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:47
CPC Classifications
E; E03; E03F; E03F11/00; C; C02; C02F; C02F3/00; C02F3/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
A septic tank construction comprising a leaching pool defined by a perforate wall sunk below ground level, a septic tank extending downwardly into the leaching pool and supported by the top of the leaching pool wall the inner wall of the leaching pool being spaced from the outer wall of the septic tank thereby exposing the entire height of the wall of the leaching pool to the pool contents, said tank having a diametrically disposed baffle wall and having an inlet discharging directly into the interior of the septic tank, and an outlet above the top of the leaching pool and connecting the interior of the septic tank with an access shaft communicating with the interior of the leaching pool, the inlet and outlet being close together and arranged to permit an elongated effluent flow path from one side of the tank to the other and then back, a removable slab on the tank having an aperture in registry with the access shaft and a removable cover closing said aperture, there being an airspace formed between the slab and the tank.
Claim 2
Dependent Claim
181 words
A septic tank construction comprising a leaching pool defined by a perforate wall sunk below ground level, a septic tank extending downwardly into the leaching pool and supported by the top of the leaching pool wall the inner wall of the leaching pool being spaced from the outer wall of the septic tank thereby exposing the entire height of the wall of the leaching pool to the pool contents, said tank having a diametrically disposed baffle wall and having an inlet discharging directly into the interior of the septic tank, and an outlet above the top of the leaching pool and connecting the interior of the septic tank with an access shaft communicating with the interior of the leaching pool, the inlet and outlet being close together and arranged to permit an elongated effluent flow path from one side of the tank to the other and then back, a removable slab on the tank having an aperture in registry with the access shaft and a removable cover closing said aperture, there being an airspace formed between the slab and the tank.
Claim 3
Dependent Claim
20 words
A septic tank construction according to claim 1, wherein the septic tank is of toroidal shape surrounding the access shaft.
Claim 4
Dependent Claim
44 words
A septic tank construction according to claim 1, wherein part of the effluent surrounds the septic tank which tapers downwardly to its bottom to form a generally triangular space between the wall of the septic tank and the inner surface of the leaching pool.
Claim 5
Dependent Claim
31 words
A septic tank construction according to claim 1, wherein the leaching pool wall is formed from sanitary drain rings shaped and arranged to provide vertically spaced rows of circumferential effluent slots.
Claim 6
Dependent Claim
45 words
A septic tank construction according to claim 1, wherein the bottom of the septic tank extends into the leaching pool wall and is apertured to connect the triangularly shaped space between the tank and the pool wall and the concrete slab is formed in segments.
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |