Simultaneous protection allowed?
No; to the extent that it protects the same invention, the national patent ceases to have effect from the date on which
(a) the period for filing the notice of opposition to the European patent expires without such notice being filed, or
(b) the opposition proceedings are finally closed, the European patent having been maintained.
(c) the national patent is granted if such date falls after that provided for in (a) or (b).
Art. 94 PL
Territorial field of application
Territory of the Grand Duchy of Luxembourg