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Johnson Matthey


Daimler loses European urea injection patent, U.S. could be next

Urea injection systems for diesel vehicles might soon be less expensive thanks to a recent ruling in a European patent case. Daimler was part owner of a patent covering selective catalytic reduction systems for diesel engines. The SCR systems use urea injected into the exhaust stream along with a special catalytic converter to transform NOx emissions into nitrogen and water. The original patent was filed by British supplier Johnson Matthey with later filings from Daimler and Umicore. Daimler eventually took a partial ownership stake in ... Read more →

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