Patent US3261779A successfully refreshed from Google Patents.
US3261779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and plant for treating sewage
Assignee: Mead Corp
•
Filing: 1962-04-10
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Granted: 1966-07-19
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Expires: 1982-04-10
Abstract
No abstract record available.
Inventors
- 👤 John K Sullins
- 👤 Richard W Self
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/04; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS FOR TREATING SEWAGE OR THE LIKE COMPRISING FEEDING SAID SEWAGE TO A SUMP TANK, OVERFLOWING A PORTION OF SAID SEWAGE IN SAID SUMP TANK TO A SETTLING CHAMBER, CONSTANTLY REMOVING SEWAGE FROM THE LOWER PORTIO S OF SAID TANK AND CHAMBER AND DELIVERING THE SAME TO A TRICKLING FILTER, AND CONSTANTLY DISCHARGING THE FILTERED PRODUCT OF SAID FILTER INTO SAID TANK.
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US3143498A
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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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |