The
German
provider
of
solar
metallisation
pastes
also
questions
the
validity
of
the
patents
at
issue,
noting
that
certain
claims
of
DuPont's
US
patents
(8,158,504
and
7,767,254)
were
rejected
by
authorities
in
Europe,
China
and
Japan.
"Heraeus
believes
DuPont’s
patent
lawsuits
seek
to
achieve
through
legal
means
what
they
cannot
achieve
through
product
performance
and
customer
service,"
the
company
says
in
a
statement.
"Heraeus
also
believes
they
are
attempting
to
improperly
influence
competition
in
the
marketplace
by
threatening
customers
and
competitors
with
potential
legal
action."
DuPont
named
SolarWorld
in
its
recently…
