an outlook on the nature of mental creations after belonging to public domain

the public domain of copyright which considers the end of protection period, attempts to cause balance among the rights of authors, society and third parties. so at the end of financial rights of author’s protection period the possibility of free utilization of these literary works will be possible. but in this situation one of the controversial difficulties is the nature of these kinds of literary works which, according to some scholars, after belonging to public domain, they will change in to the allowable. to approve their idea, they focus on common features existing in these literary works(works relating to public domain) and the allowable. on the other hand it is believed that literary works after belonging to public domain essentially works after belonging to public domain essentially due to lacking of scarcity element are not considered property at all.