Urea reduction of NOx in fuel rich combustion effluents
Patent 4325924 Issued on April 20, 1982. Estimated Expiration Date: 
April 20, 1999. 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.
April 20, 1999. 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 3599427 3900554 NOx control in catalyst manufacture Patent #: 4061597 InventorsApplicationNo. 05/844556 filed on 10/25/1977US Classes:423/235Nitrogen or nitrogenous componentExaminersPrimary: Peters, G. O.Attorney, Agent or FirmInternational ClassB01D 53/56 (20060101)AbstractMethod of reducing NOx in fuel rich combustion effluents is provided comprising introducing urea at temperatures in excess of about 1900° F. in the presence of excess fuel, wherein said urea is introduced either as a solid or solution in amounts sufficient to reduce the NOx concentration.Other References
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