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Form
Request to extend a prescribed time limit
From:
Intellectual Property Office
First published:
29 April 2014
Use this form to request to extend a prescribed time limit.
Documents
Form 52
PDF, 48.5KB, 2 pages
This file may not be suitable for users of assistive technology.
Request a different format.
If you use assistive technology and need a version of this document in a more accessible format,
please email information@ipo.gov.uk. Please tell us what format you need. It will help us if you
say what assistive technology you use.
Form 52 (locked)
MS Word Document, 153KB
This file may not be suitable for users of assistive technology.
Request a different format.
If you use assistive technology and need a version of this document in a more accessible format,
please email information@ipo.gov.uk. Please tell us what format you need. It will help us if you
say what assistive technology you use.
Form 52 (unlocked)
MS Word Document, 153KB
This file may not be suitable for users of assistive technology.
Request a different format.
If you use assistive technology and need a version of this document in a more accessible format,
please email information@ipo.gov.uk. Please tell us what format you need. It will help us if you
say what assistive technology you use.
Detail
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 (2) 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.
Fee sheet
Fee payable forms must be accompanied with a completed fee sheet.
Cost
£135
Available online

Request to extend a prescribed time limit
Published:
29 April 2014
From:
Intellectual Property Office
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