In section 72 of the 1977 Act (power to revoke patents on application), in subsection (4), “under section 75 below” is omitted and after that subsection there is inserted—

“(4A)

The reference in subsection (4) above to the specification being amended is to its being amended under section 75 below and also, in the case of a European patent (UK), to its being amended under any provision of the European Patent Convention under which the claims of the patent may be limited by amendment at the request of the proprietor.”