US2822329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquatic pond
Assignee: Individual
•
Filing: 1955-08-30
•
Granted: 1958-02-04
•
Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Llewellyn B Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/34; C02F3/02; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF TREATING THE EFFLUENT OF A BIOLOGICAL SEWAGE PLANT WHICH HAS REDUCED THE BIOLOGICAL OXYGEN DEMAND BY 80%, TO PURIFY IT, WHICH CONSISTS IN FLOWING THE TREATED EFFLUENT TO A STOCKED AQUATIC POND AND CIRCULATING THE WATER OF THE POND, WHEREBY TO REDUCE THE ORIGINAL BIOLOGICAL OXYGEN DEMAND BY 95%.
Claim 2
Independent Claim
52 words
THE METHOD OF TREATING THE EFFLUENT OF A BIOLOGICAL SEWAGE PLANT WHICH HAS REDUCED THE BIOLOGICAL OXYGEN DEMAND BY 80%, TO PURIFY IT, WHICH CONSISTS IN FLOWING THE TREATED EFFLUENT TO A STOCKED AQUATIC POND AND CIRCULATING THE WATER OF THE POND, WHEREBY TO REDUCE THE ORIGINAL BIOLOGICAL OXYGEN DEMAND BY 95%.
References Cited (Backward Citations)
US1055082A
Cited
US880783A
Cited
US1509979A
Cited
US1513882A
Cited
US1574783A
Cited
US1811181A
Cited
US1800378A
Cited
US1991896A
Cited
US2283472A
Cited
US2293051A
Cited
US2653907A
Cited
US2674574A
Cited
US2730496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |