Milacron: Extruder patent overturned in Europe

SMS has succeeded in opposing a European patent filed by rival extrusion technology company Milacron of the US.
SMS subsidiary Cincinnati Extrusion filed its opposition to Milacron’s patent covering what the Austrian company said was ‘already existing extruder technology’. The European Patent Office accepted this opposition, said SMS, and ‘the patent has now been fully revoked, due to the absence of an original invention’.
The dispute is over technology aspects of counter-rotating parallel twin-screw extruders with fully flighted variable pitch screws.
Milacron sold its Cincinnati Extrusion business to SMS in 2000 and signed a deal preventing Milacron from selling extrusion equipment outside of the US until January 2006. Since the end of the non-compete agreement, Milacron has been building its extruder sales in Europe and other regions, while SMS has entered the US market.
As well as Cincinnati Extrusion, the SMS group also owns Battenfeld Extrusionstechnik.

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