Process of making agricultural product from organic sewage sludge
Patent 4180459 Issued on December 25, 1979. Estimated Expiration Date: 
December 16, 1997. 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.
December 16, 1997. 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 2264790 InventorAssigneeApplicationNo. 05/861292 filed on 12/16/1977US Classes:71/12, From sewage or night soil210/710, Treating the insoluble substance210/724, Regulating pH71/26Sugar or distilleryExaminersPrimary: Scovronek, JosephAssistant: Konkol, Chris Attorney, Agent or FirmInternational ClassesC05F 5/00 (20060101)C05F 7/00 (20060101) C02F 1/52 (20060101) C02F 11/12 (20060101) AbstractAn acidic organic agricultural product is made by conditioning organic sewage sludge with amounts of FeCl3 and sugar factory waste lime to provide an acidic conditioned sludge, of pH greater than 3.0 but less than 5.7 and then mechanically dewatering the conditioned sludge.Other References
| |
