▁the ▁opposition ▁adm iss ible ? "). ▁The ▁O pp osition ▁Division ▁may ▁find ▁that ▁the ▁opposition ▁is ▁not ▁de emed ▁to ▁have ▁been ▁file d , ▁for ▁instance ▁because ▁the ▁opposition ▁fee ▁has ▁not ▁been ▁paid ▁within ▁the ▁nine - month ▁opposition ▁period , ▁because ▁the ▁notice ▁of ▁opposition ▁is ▁not ▁signed , ▁or ▁because ▁the ▁notice ▁is ▁not ▁in ▁an ▁accepted ▁language . ▁ ▁In ▁order ▁for ▁an ▁opposition ▁to ▁be ▁adm iss ible ▁it ▁must ▁meet ▁the ▁prov isions ▁of ▁ ▁, ▁i . e . ▁a ▁notice ▁of ▁opposition ▁must ▁be ▁file d ▁by ▁a ▁natural ▁or ▁legal ▁person ▁within ▁nine ▁months ▁from ▁the ▁publication ▁of ▁the ▁mention ▁of ▁grant ▁of ▁the ▁European ▁pat ent ▁in ▁the ▁European ▁Pat ent ▁Bul letin ▁( the ▁start ▁of ▁the ▁nine - month ▁opposition ▁period ▁depends ▁on ▁the ▁publication ▁of ▁the ▁mention ▁of ▁grant ▁of ▁the ▁European ▁pat ent ▁in ▁the ▁European ▁Pat ent ▁Bul letin , ▁not ▁on ▁the ▁publication ▁of ▁the ▁specification ▁of ▁the ▁European ▁pat ent ), ▁and ▁ ▁, ▁i . e . ▁the ▁notice ▁of ▁opposition ▁must ▁contain ▁a ▁statement ▁of ▁the ▁extent ▁to ▁which ▁the ▁European ▁pat ent ▁is ▁opposed ▁and ▁of ▁the ▁grounds ▁on ▁which ▁the ▁opposition ▁is ▁based , ▁as ▁well ▁as ▁an ▁indic ation ▁of ▁the ▁facts ▁and ▁evidence ▁presented ▁in ▁support ▁of ▁these ▁grounds . ▁ ▁In ▁addition , ▁an ▁opposition ▁is ▁also ▁rejected ▁as ▁in ad miss ible ▁if ▁it ▁fails ▁to ▁meet ▁the ▁requirements ▁of ▁ ▁after ▁the ▁oppon ent