Adversarial and non-adversarial proceedings

Opposition, limitation or revocation procedure

At the request of the proprietor, the European patent may be revoked or be limited by an amendment of the claims. The request shall be filed with the European Patent Office in accordance with the Implementing Regulations. It shall not be deemed to have been filed until the limitation or revocation fee has been paid.

The request may not be filed while opposition proceedings in respect of the European patent are pending.

The European Patent Office shall examine whether the requirements laid down in the Implementing Regulations for limiting or revoking the European patent have been met. If the European Patent Office considers that the request for limitation or revocation of the European patent meets these requirements, it shall decide to limit or revoke the European patent in accordance with the Implementing Regulations. Otherwise, it shall reject the request. The decision to limit or revoke the European patent shall apply to the European patent in all the Contracting States in respect of which it has been granted. It shall take effect on the date on which the mention of the decision is published in the European Patent Bulletin. 

If the European patent is limited, the European Patent Office shall publish the amended specification of the European patent as soon as possible after the mention of the limitation has been published in the European Patent Bulletin.

Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition shall not be deemed to have been filed until the opposition fee has been paid. The opposition shall apply to the European patent in all the Contracting States in which that patent has effect. Opponents shall be parties to the opposition proceedings as well as the proprietor of the patent. Where a person provides evidence that in a Contracting State, following a final decision, he has been entered in the patent register of such State instead of the previous proprietor, such person shall, at his request, replace the previous proprietor in respect of such State.

Opposition may only be filed on the grounds that: 

(a) the subject-matter of the European patent is not patentable;

(b) the European patent does not disclose the invention in a manner sufficiently clear and complete for it to be carried out by a person skilled in the art.

If the opposition is admissible, the Opposition Division shall examine, in accordance with the Implementing Regulations, whether at least one ground for opposition prejudices the maintenance of the European patent. During this examination, the Opposition Division shall invite the parties, as often as necessary, to file observations on communications from another party or issued by itself.

If the Opposition Division is of the opinion that at least one ground for opposition prejudices the maintenance of the European patent, it shall revoke the patent. Otherwise, it shall reject the opposition. 

If the Opposition Division is of the opinion that, taking into consideration the amendments made by the proprietor of the European patent during the opposition proceedings, the patent and the invention to which it relates 

(a) meet the requirements of this Convention, it shall decide to maintain the patent as amended, provided that the conditions laid down in the Implementing Regulations are fulfilled; 

(b) do not meet the requirements of this Convention, it shall revoke the patent. 

If the European patent is maintained as amended, the European Patent Office shall publish a new specification of the European patent as soon as possible after the mention of the opposition decision has been published in the European Patent Bulletin.

Each party to the opposition proceedings shall bear the costs it has incurred, unless the Opposition Division, for reasons of equity, orders, in accordance with the Implementing Regulations, a different apportionment of costs. 

The procedure for fixing costs shall be laid down in the Implementing Regulations. Any final decision of the European Patent Office fixing the amount of costs shall be dealt with, for the purpose of enforcement in the Contracting States, in the same way as a final decision given by a civil court of the State in which enforcement is to take place. Verification of such decision shall be limited to its authenticity. 

Any third party may, in accordance with the Implementing Regulations, intervene in opposition proceedings after the opposition period has expired, if the third party proves that  

(a) proceedings for infringement of the same patent have been instituted against him, or 

(b) following a request of the proprietor of the patent to cease alleged infringement, the third party has instituted proceedings for a ruling that he is not infringing the patent. 

An admissible intervention shall be treated as an opposition. 

European Patent Validation

Effects of the European patent in Contracting State

The patent granted by the European Patent Office shall have the same effects, as the national patents granted in Contracting states.

The European patent shall have the effects in the Contracting State as from the date, when the grant of the European patent was announced in the European Patent Bulletin.

The proprietor of the patent shall be obliged to

  • submit to the Office the translation of the patent specification to the national language within 3 months since this date, and

  • to pay the administrative fee for the publication

In the same time, the proprietor of the patent shall be obliged to

  • submit to the Office the address in the Contracting State, where the official notifications concerning his patent are to be sent.


The Office shall announce the grant of the European patent in the Bulletin and publish the translation of the European patent specification.

If the translation of the European patent specification to the national language is not submitted within the period specified above, the proprietor of the European patent may submit it in the additional time limit of 3 months, provided that he will pay the administrative fee according to the special regulation.

If the translation of the European patent specification to the national language is not submitted even within the additional time limit according to the above paragraph, the European patent shall be considered in the Contracting State as null and void from the outset.

After the announcement of the grant of the European patent in the European Patent Bulletin, the Office shall enter the European patent to the National Register of European patents with the data.


Extent of protection from the European patent

The text of the European patent in the language of the proceedings before the European Patent Office shall be decisive for the determination of the extent of protection conferred by the European patent; nevertheless, if the extent of protection conferred by the translation of the patent specification, submitted to the National Office of the Contracting State is narrower than in the language of proceedings, third parties can refer to this translation.

The proprietor of a European patent is entitled to submit to the Office the corrected translation of the European patent specification to the national language. The corrected translation shall have effects instead of the original translation as from the publication of the corrected translation by the National Office; the proprietor of the European patent shall pay the fee for the publication according to special regulations.

The rights of third persons, which on the territory of the Contracting State in good faith have used or have realised serious and effective preparations to use the subject-matter, which pursuant to the translation valid in the period before the publication of the corrected translation by the National Office was not covered by the extent of this European patent, are not affected by the delivery of the new translation.


Prohibition of the simultaneous protection

If the national patent is granted to the invention, to which the European patent has been granted with the same right of priority to the same proprietor of the patent or his successor in title, the national patent shall cease to have effect to the extent that it is identical with the European patent, from the date, on which the period for filing the notice of opposition to the European patent expires without such notice being filed, or the date of entry into force of the decision, by which the European patent has been maintained in the opposition proceedings.

The national patent shall not have effects to the extent that it is identical with the European patent, if it was granted after the expiry of the period for filing the notice of opposition to the European patent without such notice being filed, or after the date of entry into force of the decision, by which the European patent has been maintained in the opposition proceedings.

The provisions mentioned in the above two paragraphs shall not be affected by the revocation of the European patent.

European Patent

Term of the European patent

The term of the European patent shall be 20 years from the date of filing of the application.

Nothing in the preceding paragraph shall limit the right of a Contracting State to extend the term of a European patent, or to grant corresponding protection which follows immediately on expiry of the term of the patent, under the same conditions as those applying to national patents: 

(a) in order to take account of a state of war or similar emergency conditions affecting that State; 

(b) if the subject-matter of the European patent is a product or a process for manufacturing a product or a use of a product which has to undergo an administrative authorisation procedure required by law before it can be put on the market in that State. 

It shall apply mutatis mutandis to European patents granted jointly for a group of Contracting States.


Rights conferred by a European patent

A European patent shall confer on its proprietor from the date on which the mention of its grant is published in the European Patent Bulletin, in each Contracting State in respect of which it is granted, the same rights as would be conferred by a national patent granted in that State.

If the subject-matter of the European patent is a process, the protection conferred by the patent shall extend to the products directly obtained by such process.

Any infringement of a European patent shall be dealt with by national law. 

The European patent application and the resulting European patent shall be deemed not to have had, from the outset to the extent that the patent has been revoked or limited in opposition, limitation or revocation proceedings.


Extent of protection

The extent of the protection conferred by a European patent or a European patent application shall be determined by the claims. Nevertheless, the description and drawings shall be used to interpret the claims.

For the period up to grant of the European patent, the extent of the protection conferred by the European patent application shall be determined by the claims contained in the application as published. However, the European patent as granted or as amended in opposition, limitation or revocation proceedings shall determine retroactively the protection conferred by the application, in so far as such protection is not thereby extended.

In any designated Contracting State a European patent application and a European patent shall have with regard to a national patent application and a national patent the same prior right effect as a national patent application and a national patent. A national patent application and a national patent in a Contracting State shall have with regard to a European patent designating that Contracting State the same prior right effect as if the European patent were a national patent. Any Contracting State may prescribe whether and on what terms an invention disclosed in both a European patent application or patent and a national application or patent having the same date of filing or, where priority is claimed, the same date of priority, may be protected simultaneously by both applications or patents. 

Filing of a European patent application

In proceedings before the European Patent Office, documents may be filed by delivery by hand, by postal services or by means of electronic communication. The President of the European Patent Office shall lay down the details and conditions and, where appropriate, any special formal or technical requirements for the filing of documents. In particular, he may specify that confirmation must be supplied. If such confirmation is not supplied in due time, the European patent application shall be refused; documents filed subsequently shall be deemed not to have been received.

Where the Convention provides that a document must be signed, the authenticity of the document may be confirmed by handwritten signature or other appropriate means the use of which has been permitted by the President of the European Patent Office. A document authenticated by such other means shall be deemed to meet the legal requirements of signature in the same way as a document bearing a handwritten signature which has been filed in paper form.

A European patent application may be filed: 

(a) with the European Patent Office, or 

(b) if the law of a Contracting State so permits with the central industrial property office or other competent authority of that State. Any application filed in this way shall have the same effect as if it had been filed on the same date with the European Patent Office.

The central industrial property office of a Contracting State shall forward to the European Patent Office any European patent application filed with it or any other competent authority in that State, in accordance with the Implementing Regulations. A European patent application the subject of which has been made secret shall not be forwarded to the European Patent Office. A European patent application not forwarded to the European Patent Office in due time shall be deemed to be withdrawn. 

A European divisional application shall be filed directly with the European Patent Office in accordance with the Implementing Regulations. It may be filed only in respect of subject-matter which does not extend beyond the content of the earlier application as filed; in so far as this requirement is complied with, the divisional application shall be deemed to have been filed on the date of filing of the earlier application and shall enjoy any right of priority. All the Contracting States designated in the earlier application at the time of filing of a European divisional application shall be deemed to be designated in the divisional application.

European patent applications may be filed in writing with the European Patent Office in Munich, The Hague or Berlin, or the National authorities. The authority with which the European patent application is filed shall mark the documents making up the application with the date of their receipt, and issue without delay a receipt to the applicant including at least the application number and the nature, number and date of receipt of the documents. 

If the European patent application is filed with an authority, such authority shall without delay inform the European Patent Office of the receipt of the application, and, in particular, of the nature and date of receipt of the documents, the application number and any priority date claimed.

Upon receipt of a European patent application forwarded by the central industrial property office of a Contracting State, the European Patent Office shall inform the applicant accordingly, indicating the date of its receipt. 

The applicant may file a divisional application relating to any pending earlier European patent application. 

A divisional application shall be filed in the language of the proceedings for the earlier application. If the latter was not in an official language of the European Patent Office, the divisional application may be filed in the language of the earlier application; a translation into the language of the proceedings for the earlier application shall then be filed within two months of the filing of the divisional application. The divisional application shall be filed with the European Patent Office in Munich, The Hague or Berlin. The filing fee and search fee shall be paid within one month of filing the divisional application. If the filing fee or search fee is not paid in due time, the application shall be deemed to be withdrawn. The designation fee shall be paid within six months of the date on which the European Patent Bulletin mentions the publication of the European search report drawn up in respect of the divisional application.

The filing fee and search fee shall be paid within one month of filing the European patent application. The Rules relating to Fees may provide for an additional fee as part of the filing fee if the application comprises more than 35 pages. The additional fee shall be paid within one month of filing the European patent application or one month of filing the first set of claims or one month of filing the certified copy, whichever period expires last.

The designation fee shall be paid within six months of the date on which the European Patent Bulletin mentions the publication of the European search report. Where the designation fee is not paid in due time or the designations of all the Contracting States are withdrawn, the European patent application shall be deemed to be withdrawn.

The date of filing of a European patent application shall be the date on which the documents filed by the applicant contain: 

(a) an indication that a European patent is sought; 

(b) information identifying the applicant or allowing the applicant to be contacted; and 

(c) a description or reference to a previously filed application. 

A reference to a previously filed application shall state the filing date and number of that application and the Office with which it was filed. Such reference shall indicate that it replaces the description and any drawings.

Where the application contains a reference, a certified copy of the previously filed application shall be filed within two months of filing the application. Where the previously filed application is not in an official language of the European Patent Office, a translation thereof in one of these languages shall be filed within the same period.

Applying for European Patent

General requirements

Persons entitled to apply for and obtain a European patent

A European patent application may be filed by any natural or legal person, or anybody equivalent to a legal person by virtue of the law governing it. 

A European patent application may also be filed either by joint applicants or by two or more applicants designating different Contracting States.

The inventor shall have the right, vis-à-vis the applicant for or proprietor of a European patent, to be mentioned as such before the European Patent Office. 

The right to a European patent shall belong to the inventor or his successor in title. If the inventor is an employee, the right to a European patent shall be determined in accordance with the law of the State in which the employee is mainly employed; if the State in which the employee is mainly employed cannot be determined, the law to be applied shall be that of the State in which the employer has the place of business to which the employee is attached.

If two or more persons have made an invention independently of each other, the right to a European patent therefor shall belong to the person whose European patent application has the earliest date of filing, provided that this first application has been published.

In proceedings before the European Patent Office, the applicant shall be deemed to be entitled to exercise the right to a European patent.

If by a final decision it is adjudged that a person other than the applicant is entitled to the grant of the European patent, that person may, in accordance with the Implementing Regulations: 

(a) prosecute the European patent application as his own application in place of the applicant; 

(b) file a new European patent application in respect of the same invention; or 

(c) request that the European patent application be refused.