https://www.epo.org/en/service-support/faq/applying-patent/patent-prosecution-highway-pph/overview-pph-procedure/written
The written opinion from the International Searching Authority (WO-ISA) and/or the International Preliminary Report on Patentability (IPER) contain “certain observations on the international application” in Box VIII. Is this relevant for my PPH request?
Yes. If available, you need to provide the explanations regarding Box VIII observations, contained either in Form PCT/ISA/237 – Written Opinion or Form PCT PCT/IPEA/409 - International Preliminary Report on Patentability.
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