Metso Corporation : Metso's patent held invalid and earlier favorable decision reversed by Court of Appeals in a US patent

Metso Corporation : Metso's patent held invalid and earlier favorable decision
        reversed by Court of Appeals in a US patent infringement case

Metso Corporation's stock exchange release on May 15, 2013 at 3:35 p.m. local
time

The United States Court of Appeals for the Federal Circuit has given an
unfavorable decision to Metso holding Metso's patent invalid with respect to
the issues subject to the lawsuit Metso has carried out against Powerscreen
International Distribution Ltd (today known as Terex GB Ltd), Terex
Corporation, Emerald Equipment Systems, Inc. et al. The case involves the
Metso's lateral folding conveyor patent rights related to mobile crushing and
screening plants. The Court of Appeals has reversed the favorable decisions to
Metso given earlier by the United States District Court for the Eastern
District of New York in the case (see Metso's stock exchange releases December
7, 2010 and December 12, 2011).

Metso will seek reversal of this Court of Appeals' decision by motions and, as
necessary, by further appeal. The final outcome of the lawsuit would be
expected within 2014.

Metso has not booked any compensation in its financial results based on the
earlier decisions related to this case; and will do so, if any, only when the
final outcome of the lawsuit is clear, earliest in 2014.



Metso's mining and construction professionals specialize in always bringing
the right technology, processes, machinery and services to our customers in
the aggregates production, construction, mining and minerals processing and in
metal and waste recycling. Expect results.

www.metso.com/miningandconstruction



Metso is a global supplier of technology and services to customers in the
process industries, including mining, construction, pulp and paper, power, and
oil and gas. Our 30,000 professionals based in over 50 countries contribute to
sustainability and profitability to customers worldwide. Metso's shares are
listed on the NASDAQ OMX Helsinki Ltd.

www.metso.com/fi , www.twitter.com/metsogroup

For further information, please contact:

Erica Aminoff, Senior Vice President, Chief Legal Officer, Mining and
Construction, Metso, tel. +358 20 484 3246

Juha Rouhiainen, Vice President, Investor Relations, Metso,     Tel. +358
20 484 3253

Metso Corporation

Harri Nikunen

CFO

Juha Rouhiainen

VP, Investor Relations

Distribution:

NASDAQ OMX Helsinki Ltd

Media

www.metso.com

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Source: Metso Corporation via Thomson Reuters ONE
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