http://www.legislation.gov.uk/uksi/2007/3291/article/39/madeThe Patents Rules 2007Reference librariesenKing's Printer of Acts of Parliament2019-07-16PATENTS These Rules are made under the Patents Act 1977 (c. 37) (“the Act”). They regulate applications for patents and other procedures before the Patent Office in relation to patents. These Rules make substantial changes to both the drafting and effect of the Patents Rules 1995 (SI 1995/2093) which are revoked together with the other instruments listed in Schedule 6 to these Rules. PART 3 39 1 This rule applies where the renewal fee has not been received by the end of the renewal period. 2 The comptroller must, before the end of the period of six weeks beginning immediately after the end of the renewal period, and if the fee remains unpaid, send a renewal notice to the proprietor of the patent. 3 The comptroller must send the renewal notice to— a the address specified by the proprietor on payment of the last renewal fee (or to another address that has since been notified to him for that purpose by the proprietor); or b where such an address has not been so specified or notified, the address for service entered in the register. 4 The renewal notice must remind the proprietor of the patent— a that payment is overdue; and b of the consequences of non-payment.