US2875151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treatment of sewage
Assignee: Schenley Industries Inc
•
Filing: 1952-04-22
•
Granted: 1959-02-24
•
Expires: 1972-04-22
Abstract
No abstract record available.
Inventors
- 👤 Alex B Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:56
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE METHOD OF TREATMENT OF SEWAGE TO PURIFY IT COMPRISING THE STEPS OF SUBJECTING THE RAW SEWAGE TO AEROBIC DECOMPOSITION, SUBJECTING THE EFFLUENT FROM SAID AEROBIC DECOMPOSITION STEP TO ANAEROBIC DIGESTION, FEEDING THE SLUDGE RESULTING FROM SAID ANAEROBIC DIGESTION STEP IN WITH THE INFLUENT RAW SEWAGE BEING SUBJECTED TO AEROBIC DECOMPOSITION, AND AGITATING THROUGHOUT THE PROCESS THE MATERIAL BEING TREATED.
Claim 2
Independent Claim
60 words
THE METHOD OF TREATMENT OF SEWAGE TO PURIFY IT COMPRISING THE STEPS OF SUBJECTING THE RAW SEWAGE TO AEROBIC DECOMPOSITION, SUBJECTING THE EFFLUENT FROM SAID AEROBIC DECOMPOSITION STEP TO ANAEROBIC DIGESTION, FEEDING THE SLUDGE RESULTING FROM SAID ANAEROBIC DIGESTION STEP IN WITH THE INFLUENT RAW SEWAGE BEING SUBJECTED TO AEROBIC DECOMPOSITION, AND AGITATING THROUGHOUT THE PROCESS THE MATERIAL BEING TREATED.
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |