US3579646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shipboard recirculation sewage system
Assignee: Individual
•
Filing: 1968-05-16
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Granted: 1971-05-25
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Expires: 1988-05-16
Abstract
Abstract RECIRCULATION SEEWAGE SYSTEM FOR SHIPBOARD USE HAVING A HOLDING TANK WHICH ENABLES THE TOILET FLUSHING LIQUID TO BE RE-CYCLED FOLLOWING REMOVAL OF SIZABLE PARTICULATE MATTER THEREFROM IN THE TANK. THE TANK INCLUDES: A CHAMBER PART WHICH RECEIVES INCOMING WASTE DISCHARGED BY THE TOILET IN WHICH HEAVIER SOLIDS SETTLE OUT, A LONGITUDINAL BAFFLE SCREEN WHICH IS SELF CLEANING DUE TO SHIP MOTION AND WHICH SCREENS OUT OTHER SOLIDS, AND A PICK UP CHAMBER INTO WHICH THE SCREENED LIQUID IS ADMITTED AND WHICH HAS A FLOAT-MOUNTED SWINGING SUCTION PIPE THROUGH WHICH ONLY SURFACE LIQUID IS DRAWN FROM THE TANK.
Inventors
- 👤 Robert L Lekberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:38
CPC Classifications
B; B63; B63B; B63B29/00; B63B29/16
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |