Urea reduction of NOx in combustion effluents
Patent 4208386 Issued on June 17, 1980. Estimated Expiration Date: 
June 17, 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.
June 17, 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 3565575 3801696 3846981 3867507 3900554 NOx control in catalyst manufacture Patent #: 4061597 InventorsApplicationNo. 05/663415 filed on 03/03/1976US Classes:423/235Nitrogen or nitrogenous componentExaminersPrimary: Peters, G. O.Attorney, Agent or FirmInternational ClassesB01D 53/56 (20060101)F01N 3/20 (20060101) AbstractMethod for reducing NOx in combustion effluents comprising introducing urea at elevated temperatures in the presence of oxygen, either as a solid or solution in amounts sufficient to reduce the NOx concentration. Conveniently, the urea may be introduced as a solid powder or as a solution in a hydroxylic solvent, at temperatures in excess of 1300° F. and in the presence of at least 0.1 volume percent oxygen.This invention was made under contract with or supported by the Electric Power Research Institute.Other References
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