Apparatus and process for producing an organic product from sewage sludge
Patent 3963471 Issued on June 15, 1976. Estimated Expiration Date: 
June 15, 1993. 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.
June 15, 1993. 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 1915240 2977214 3025151 3342731 InventorApplicationNo. 480745 filed on 06/19/1974US Classes:71/12, From sewage or night soil210/710, Treating the insoluble substance210/770, Including drying (e.g., by squeezing or heating, etc.)34/378With additional treating of recirculated portion (e.g., heating, cooling, separating)ExaminersPrimary: Hart, Charles N.Assistant: Lander, Ferris H. Attorney, Agent or FirmAbstractA completely integrated and automated apparatus by which liquid sewage sludge from any sewage or waste treatment plant may be processed into a completely dry, pelletized and sterilized product of an organic nature containing nutrients valuable for the support of plant life. The apparatus involves one completely integrated and automated unit together with a control center by means of which electric circuits program each component of the apparatus to automatically regulate the operation of each component, so that no labor or other manpower is required in the operation, except for observation, lubrication, maintenance and repair of the various motors and machineries involved.Field of SearchFrom sewage or night soil | |
