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ARTICLE · 24 NOVEMBER 2023

New Practice At The EPO: Divisional Applications And Sequence Listings

Safeguard measure: Excess page fees on ST.25 sequence listings included as part of a divisional application to be waived by the EPO.

United KingdomIntellectual Property

Safeguard measure: Excess page fees on ST.25 sequence listings included as part of a divisional application to be waived by the EPO.

Following the implementation of WIPO Sequence standard ST.26, the EPO has required that new divisional applications filed on or after 1 July 2022 require a sequence listing in the ST.26 format, even when the parent application contained an ST.25 standard compliant sequence listing. This practice has been met with concern from practitioners regarding the risk of added subject matter.

To address the concerns around the risk of adding or losing subject matter, the EPO has announced a new safeguard measure. The safeguard measure permits applicants to file the parent application's ST.25 sequence listing in PDF format as part of the divisional application. Importantly, the ST.25 pages included as a safeguard are excluded from the page fee calculation. Alternatively, the divisional application may be filed by reference to the parent

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