Request to extend a prescribed time limit
Use this form to request to extend a prescribed time limit.
This form is used to either:
- to request a two month extension (where no such request has been made previously) to a time period prescribed by the rules listed in part 2 of Schedule 4 of the Patents Rules, or
- to request the comptroller to otherwise extend (or further extend) a time period prescribed by the rules listed in part 2 of Schedule 4 of the Patents Rules
Where the request is made under the second bullet point above you must send evidence supporting the grounds for the request either with this form or as soon as possible afterwards (unless the office otherwise directs).
If the time period you wish to extend appears in part 3 of Schedule 4 of the Patents Rules you may request an extension of two months to these periods under the provisions of (i) above (rule 108(2)). Further extensions for these time periods are available under rule 108(3) however you should contact the office for advice on when these extensions are available.
Last updated 26 April 2023 + show all updates
A new end page has been added. This contains a checklist and sending instructions. Supporting text added to questions that required further clarification.
Form PF52 fee sheet updated.
Zero fees ended and normal fees resume from 1st April 2021.
E-mail address for sending the completed form has been added.
Details of the costs have changed.
Patent Form 52: Data Privacy added.