GA D II 16 Refusal to perform preliminary examination

The EPO as IPEA will not perform an international preliminary examination on any claim for which no international search was performed (see point 254). In this context it is not relevant whether the applicant files amendments and/or arguments that, allegedly, overcome the reasons for the decision of the ISA not to search the claims concerned.
Further, the EPO as IPEA will make use of its discretion not to carry out preliminary examination if the application relates to subject-matter listed in Rule 67 PCT to the extent that such subject-matter is not regarded as an invention or susceptible of industrial application or is excluded from patentability under the provisions of the EPC.
Agreement EPO-WIPO, Art. 4 
OJ 2007, 592
Also, if the application fails to comply with the prescribed requirements to such an extent that no meaningful opinion can be formed on novelty, inventive step or industrial applicability, no preliminary opinion on these questions will be established. 

12 references found.

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EPO Guide for Applicants, part II Int.

EPO Guide for Applicants, part II Int. - C The EPO as ISA and SISA

EPO Guide for Applicants, part II Int. - D The EPO as an IPEA

EPO Guide for Applicants, part II Int. - E Euro-PCT procedure before the EPO as designated or elected Office

PCT Articles

PCT Implementing Rules

Offical Journal of the EPO