Waste water drainage and recovery system
Patent 4971690 Issued on November 20, 1990. Estimated Expiration Date: 
May 2, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 2, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 292046 2795542 3306447 Sewage treatment and recycling system Septic tank drainage conduit structures Water distribution system Method and apparatus for treating household waste water Fluid drain pump Patent #: 4865069 InventorApplicationNo. 346461 filed on 05/02/1989US Classes:210/170, Geographic (e.g., drainage ditch, septic, pond)210/258, With pump, gas pressure or vacuum source210/532.2, Septic tank405/36DRAINAGE OR IRRIGATIONExaminersPrimary: Spear, FrankAssistant: Drodge, Joseph W. Attorney, Agent or FirmForeign Patent References
International ClassE02B 013/00AbstractWaste water from a residence flows to an on-site waste water treatment facility, such as a septic tank. The leachate passing from the septic tank flows to a chlorine-contact chamber for treating the waste water from the septic tank with chlorine. The treated waste water flows from the contact chamber to a drainage field located below ground level. Percolating sand and a natural filter media filter the treated waste water which is distributed by the drainage field. A perforated water recovery pipe is located below the filter media to collect the treated and filtered water. A suction pump pumps water collected in the recovery pipe to above ground level. A sprinkler connected to the suction pump distributes water pumped from the recovery pipe for irrigating the ground surface.Field of SearchGeographic (e.g., drainage ditch, septic, pond)Diverse type With pump, gas pressure or vacuum source Diverse Septic tank Including geographic feature (e.g., drainage ditch, septic, pond) Heavier constituent trap, chamber, or recess DRAINAGE OR IRRIGATION Porous or apertured pipe, flume, or tileway | |
