Patent US2713028A successfully refreshed from Google Patents.
US2713028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment
Assignee: Individual
•
Filing: 1951-04-20
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Granted: 1955-07-12
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Expires: 1971-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jenks Harry Neville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:19
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/121; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
THE CONTINUOUS BIOLOGIC PROCESS OF TREATING POLLUTED LIQUIDS, WHICH COMPRISES SUPPLYING FEED FOR TREATMENT IN A SYSTEM INCLUDING A SHALLOW BIOLOGIC FILTER BED OF DISCRETE MATERIAL AND DETENTION ZONE, CONTROLLABLY PASSING EFFLUENT FROM THE DETENTION ZONE THROUGH THE FILTER BED AT A RATE MAINTAINED TO LIE IN A RANGE OF FROM 200 TO 800 MILLION GALLONS PER ACRE PER DAY AND THE TIME OF PASSAGE OF THE LIQUID THROUGH THE BED TO LIE IN A RANGE OF FROM 10 TO 40 SECONDS, RETURING DISCHARGE FROM THE BED TO THE DETENTION ZONE HAVING A DETENTION CAPACITY OF FROM 3 TO 24 HOURS INFLOW OF FEED SUPPLIED TO THE SYSTEM, AND RELEASING BIOLOGICALLY STABILIZED LIQUID FROM THE SYSTEM.
References Cited (Backward Citations)
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US2021679A
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US2077498A
Cited
US2142196A
Cited
US2348126A
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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) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |