Section 113

For the purposes of this Act, an invention for a patent for which an application has been made or for which a patent has been granted is, unless the context otherwise requires, taken to be that specified in a claim of the specification of the application or patent (as the case may be) as interpreted by the description and any drawings contained in that specification, and the extent of the protection conferred by a patent or application for a patent is to be determined accordingly.

To avoid doubt, where more than one invention is specified in any such claim, each invention may have a different priority date under section 17.