Patent US3300403A successfully refreshed from Google Patents.
US3300403A
Expired / Lapsed
US
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Sewage treatment
Assignee: Individual
•
Filing: 1964-10-20
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Granted: 1967-01-24
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Expires: 1984-10-20
Abstract
No abstract record available.
Inventors
- 👤 Albert J Kehoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1226; C02F1/00; C02F1/28; C02F1/283; C02F11/00; C02F11/12; C02F9/00; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
IN A SEWAGE TREATMENT PROCESS, THE IMPROVEMENT IN TREATING SOLIDS IN THE SEWAGE WHICH COMPRISES, (A) MIXING RAW SEWAGE AS RECEIVED WITH POWDERED COAL, (B) SEPARATING THE SOLIDS AND LIQUIDS IN THE MIXTURE OF COAL AND SEWAGE AND REMOVING THE SOLIDS FROM THE LIQUIDS, (C) ADDING A FLOCCULATING AGENT TO THE SEPARATED SOLIDS, AND (D) FILTERING THE SOLIDS AFTER ADDITION OF THE FLOCCULATING AGENT.
References Cited (Backward Citations)
US1617014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |