For more details on the doctrine of equivalents, see below. Section 2.6 on patent claims interpretation. Even under a broad doctrine of equivalents, however, process patent claims would not encompass all possible ways of making and using a product (including unknown ones), as opposed to the scope of product patents. This option is no longer available for developing country members.79 For LDC members, the TRIPS Agreement originally provided for a transition period lasting until 1 January 2006 for the implementation of TRIPS obligations (Article 66.1). However, this period has been extended in two different ways, one affecting the implementation of the TRIPS provisions in general, and the other one relating to the protection of pharmaceutical products, in particular.