A.88 EPC Claiming priority

An applicant desiring to take advantage of the priority of a previous application shall file a declaration of priority and any other document required, in accordance with the Implementing Regulations. 
Multiple priorities may be claimed in respect of a European patent application, notwithstanding the fact that they originated in different countries. Where appropriate, multiple priorities may be claimed for any one claim. Where multiple priorities are claimed, time limits which run from the date of priority shall run from the earliest date of priority. 
If one or more priorities are claimed in respect of a European patent application, the right of priority shall cover only those elements of the European patent application which are included in the application or applications whose priority is claimed. 
If certain elements of the invention for which priority is claimed do not appear among the claims formulated in the previous application, priority may nonetheless be granted, provided that the documents of the previous application as a whole specifically disclose such elements. 
[ Art. 66 79 90 93 R. 5 6 41 52 53 57 60 68 139 163 ]
Amended by the Act revising the European Patent Convention of 29.11.2000. 
See decision/opinion of the Enlarged Board of Appeal G 3/93, G 2/98 (Annex I).
See decision of the President of the EPO of 12.07.2007 concerning the filing of priority documents for European divisional applications and for new European patent applications under Article 61(1)(b) EPC (Special edition No. 3, OJ EPO 2007, B.2) and decision of the President of the EPO of 09.08.2012 on the filing of priority documents (OJ EPO 2012, 492).

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EPC Articles

EPC Implementing Rules

EPO Guidelines - A Formalities Examination

EPO Guidelines - E General Procedural Matters

EPO Guidelines - F The European Patent Application

EPO PCT GL - F (not assigned)

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

Offical Journal of the EPO

Case Law Book: II Conditions to be met by an Application

Case Law Book: IV Divisional Applications

Case Law of the Enlarged Board

General Case Law