US3564854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Septic tank system
Assignee: GEORGE W BERTHOLD
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Filing: 1969-05-13
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Granted: 1971-02-23
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Expires: 1989-05-13
Abstract
Abstract A SEPTIC TANK SYSTEM INCLUDING AN UPRIGHT PARTIALLY EMBEDDED SEPTIC TANK HAVING AN INTAKE VENT COMMUNICATING WITH THE UPPER INTERIOR OF THE TANK FOR THE INTRODUCTION OF FRESH AIR THEREINTO, AND AN AIR DISCHARGE LINE SPACED FROM THE AIR VENT AND EXTENDING FROM THE ABOVE GROUND PORTION OF THE TANK TO A DRAIN FIELD WHEREBY A FLOW OF AIR THROUGH THE TANK IS POSSIBLE SO AS TO ASSIST IN THE DECOMPOSITION OF THE SEWAGE. A BAFFLE SYSTEM IS INTERNALLY LOCATED WITHIN THE TANK SO AS TO PREVENT A BACKFLOW OF AIR THROUGH THE VENT AND AN AIR PUMP UNIT IS ASSOCIATED WITH THE DISCHARGE LINE SO AS TO PROVIDE FOR A FORCED FLOW OF AIR.
Inventors
- 👤 George W Berthold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:21
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2866; C02F3/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |