Method and device for nitric oxide reduction in exhaust fumes
Patent 6110435 Issued on August 29, 2000. Estimated Expiration Date: 
May 13, 2018. 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 13, 2018. 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 ReferencesNOx control in catalyst manufacture Urea reduction of NOx in combustion effluents Methods for chemically reducing nitrogen oxides Using flue gas energy to vaporize aqueous reducing agent for reduction of NOx in flue gas Reducing NOx emissions from an engine by selective catalytic reduction utilizing solid reagents Patent #: 5809775 InventorsAssigneeApplicationNo. 076789 filed on 05/13/1998US Classes:423/235, Nitrogen or nitrogenous component423/210.5, Direct contact with molten material423/212Mixture is exhaust from internal-combustion engineExaminersPrimary: Griffin, Steven P.Assistant: Medina, Maribel Attorney, Agent or FirmForeign Patent References
International ClassesC01B 021/00B01D 047/00 Foreign Application Priority Data1997-05-13 DEAbstractA process for reducing nitrogen oxides in the exhaust gas of a combustion device, particularly of an internal-combustion engine, includes melting solid pure urea to obtain a molten product, and adding the molten product to the exhaust gas as the reducing agent for reducing nitrogen oxides. The corresponding device includes a device for the controlled liquefaction of solid pure urea and the injection of the molten product into the exhaust gas.Other References
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