US3618773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purification apparatus
Assignee: Sten Jaquet AB
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Filing: 1969-11-24
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Granted: 1971-11-09
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Expires: 1989-11-24
Abstract
Abstract Contaminated raw or waste water is delivered into at least one basin which is supported within a water-filled reservoir. The contaminated water in said basin is subjected to mechanical, biological and/or chemical purification, and the treated effluent is caused to overflow into the reservoir. The basin has a conical wall of supple nonporous material that yields readily to even slight movements of the water both internally and externally of the basin unit.
Inventors
- 👤 Sten Jacquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; B; B01; B01D; B01D21/00; B01D21/0006; B01D21/003; B01D21/0039; B01D21/0042; B01D21/02; B01D21/08; B01D21/24; B01D21/30; B01D21/307; B01D21/34; C02F1/00; C02F1/52; C02F1/5281; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y02W10/30; Y02W10/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
The water purification plant of claim 1, wherein said outlet means in the basin comprises apertures in its sidewalls at a level below that of water in the reservoir, to prevent floating material in the basin from passing into the reservoir.
Claim 2
Dependent Claim
46 words
The water purification plant of claim 1, wherein said means for maintaining substantially uncontaminated water in the reservoir further comprises: a fresh water supply valve for the reservoir; and a float actuator for said valve that is responsive to the level of water in the reservoir.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |