Applying for European Patent

Languages of the European Patent Office, European patent applications and other documents

The official languages of the European Patent Office shall be English, French and German. 

A European patent application shall be filed in one of the official languages or, if filed in any other language, translated into one of the official languages in accordance with the Implementing Regulations. Throughout the proceedings before the European Patent Office, such translation may be brought into conformity with the application as filed. If a required translation is not filed in due time, the application shall be deemed to be withdrawn. 

The official language of the European Patent Office in which the European patent application is filed or into which it is translated shall be used as the language of the proceedings in all proceedings before the European Patent Office, unless the Implementing Regulations provide otherwise.

Natural or legal persons having their residence or principal place of business within a Contracting State having a language other than English, French or German as an official language, and nationals of that State who are resident abroad, may file documents which have to be filed within a time limit in an official language of that State. They shall, however, file a translation in an official language of the European Patent Office in accordance with the Implementing Regulations. If any document, other than those documents making up the European patent application, is not filed in the prescribed language, or if any required translation is not filed in due time, the document shall be deemed not to have been filed.

European patent applications shall be published in the language of the proceedings.

Specifications of European patents shall be published in the language of the proceedings and shall include a translation of the claims in the other two official languages of the European Patent Office. 

In written proceedings before the European Patent Office, any party may use any official language of the European Patent Office. The translation, may be filed in any official language of the European Patent Office. Amendments to a European patent application or European patent shall be filed in the language of the proceedings. Documentary evidence and, in particular, publications may be filed in any language. The European Patent Office may, however, require that a translation in one of its official languages be filed, within a period to be specified. If a required translation is not filed in due time, the European Patent Office may disregard the document in question.

Any party to oral proceedings before the European Patent Office may use an official language of the European Patent Office other than the language of the proceedings, if such party gives notice to the European Patent Office at least one month before the date of such oral proceedings or provides for interpretation into the language of the proceedings. Any party may use an official language of a Contracting State, if he provides for interpretation into the language of the proceedings. The European Patent Office may permit derogations from these provisions.

Where evidence is taken, any party, witness or expert to be heard who is unable to express himself adequately in an official language of the European Patent Office or of a Contracting State may use another language. Where evidence is taken upon request of a party, parties, witnesses or experts expressing themselves in a language other than an official language of the European Patent Office shall be heard only if that party provides for interpretation into the language of the proceedings. The European Patent Office may, however, permit interpretation into one of its other official languages.

If the parties and the European Patent Office agree, any language may be used.

The European Patent Office shall, if necessary, provide at its own expense interpretation into the language of the proceedings, or, where appropriate, into its other official languages, unless such interpretation is the responsibility of one of the parties.

Statements by employees of the European Patent Office, parties, witnesses or experts, made in an official language of the European Patent Office, shall be entered in the minutes in that language. Statements made in any other language shall be entered in the official language into which they are translated. Amendments to a European patent application or European patent shall be entered in the minutes in the language of the proceedings.

Where the translation of a document is required, the European Patent Office may require that a certificate that the translation corresponds to the original text be filed within a period to be specified. If the certificate is not filed in due time, such document shall be deemed not to have been filed, unless otherwise provided. 

In written proceedings before the European Patent Office, any party may use any official language of the European Patent Office. The translation may be filed in any official language of the European Patent Office. Amendments to a European patent application or European patent shall be filed in the language of the proceedings. Documentary evidence and, in particular, publications may be filed in any language. The European Patent Office may, however, require that a translation in one of its official languages be filed, within a period to be specified. If a required translation is not filed in due time, the European Patent Office may disregard the document in question.

Any party to oral proceedings before the European Patent Office may use an official language of the European Patent Office other than the language of the proceedings, if such party gives notice to the European Patent Office at least one month before the date of such oral proceedings or provides for interpretation into the language of the proceedings. Any party may use an official language of a Contracting State, if he provides for interpretation into the language of the proceedings. The European Patent Office may permit derogations from these provisions.  

In the course of oral proceedings, employees of the European Patent Office may use an official language of the European Patent Office other than the language of the proceedings. 

Where evidence is taken, any party, witness or expert to be heard who is unable to express himself adequately in an official language of the European Patent Office or of a Contracting State may use another language. Where evidence is taken upon request of a party, parties, witnesses or experts expressing themselves in a language other than an official language of the European Patent Office shall be heard only if that party provides for interpretation into the language of the proceedings. The European Patent Office may, however, permit interpretation into one of its other official languages.