Procedure when the EPO was the ISA 

Applicants must be given a further opportunity for interaction in Chapter II before a negative IPER is established, on condition that they have filed in due time a substantive reply to the WO‑ISA in the form of amendments and/or arguments.

OJ EPO 2011, 532

Thus if, after reply to the WO‑ISA, there are still objections outstanding, before issuing a negative IPER the examiner must send:

as a rule, a (further) written opinion (Form 408, WO-IPEA), but: 
if a request for a telephone consultation was filed before the (further) written opinion was issued: telephone minutes; 
if a request for either a telephone consultation or a (further) written opinion (see GL/PCT‑EPO C‑VII, 1) was filed before the (further) written opinion was issued: a written opinion or telephone minutes,

in either case generally (see GL/PCT‑EPO C‑VII, 1) with a time limit to reply which is normally two months, in order to give the applicant a further opportunity to provide arguments and/or amendments in reply to any outstanding objections. Documents newly found during the top-up search (see GL/PCT‑EPO C‑IV, 5) are attached to the WO-IPEA or to the telephone minutes, as appropriate.

If the applicant has not submitted any response to the negative WO‑ISA with the demand, and the top-up search in Chapter II does not reveal any new pertinent prior art, then a negative IPER, repeating the objections raised in the WO‑ISA, will be issued directly.

In the exceptional situation of a non-unitary application, where all inventions examined were found novel and inventive, but still lacking unity as the only remaining objection, a negative IPER can be sent directly without a further WO-IPEA (see GL/PCT‑EPO C‑VIII, 3).

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