Once a European patent has been granted the nature and scope of the protection it confers must be determined. In considering such protection this chapter focuses on four issues of central importance to that end. The first is the effects of a patent, namely, the territories in and term for which it is valid. The second is the object of protection, namely, the subject matter that the public is excluded from using during the term of its protection. The third is the nature of protection, namely, the uses of the subject matter from which the public is excluded. And the fourth is the limitations to protection, namely, the uses of an invention that the law permits notwithstanding its protection by patent grant.