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US3770623A
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System for purification of polluted water
Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV
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Filing: 1972-05-01
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Granted: 1973-11-06
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Expires: 1992-05-01
Abstract
Abstract METHOD AND APPARATUS FOR REMOVAL OF SUSPENDED AND DISSOLVED POLUTANTS FOR WATER BY FLOW OF WATER OVER AND THROUGH BEDS HAVING SUITABLE VEGETATION ROOTED AND GROWING THEREIN. SUSPENDED AND DISSOLVED MATERIAL ARE REMOVED IN SEPARATE BEDS USING DIFFERENT TYPES OF VEGETATION. WHERE THE POLLUTANT IS SEWAGE, POTABLE WATER CAN BE PRODUCED.
Inventors
- 👤 K Seidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:12
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F3/32; C02F3/327; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |