According to the Polish Industrial Property Law, any person may give a reasoned notice of opposition to a final decision of the Patent Office on the grant of a right of protection within six months from publication of the grant in the Polish Patent Office Bulletin. Non-compliance with the six-month deadline renders an opposition completely ineffective. Within the statutory six months the opponent is bound to specify the legal basis for the opposition, together with substantiation of it. If necessary, the opposition may have to be completed or supplemented upon the Polish Patent Office's request. It is not obligatory for the opponent to prove one's legal interest, however filing the opposition is limited to a strict time frame: if six months from the grant passes, the opportunity to oppose is no longer available. The opposition procedure is available to any party that is able to prove that for some reason granting the protection right for a trade mark has violated the law.
