EU / Europe (EPO + EUIPO)

**Filing via EPO:** One application, one examination, designating up to 39 member states. Cost-effective; examination outcome applies uniformly to all designations. Post-grant validation is required in each target country (unless a Unitary Patent is requested). **Direct national filing:** Each country requires a separate application, examination, and fee payment — typically more expensive overall, but may be more economical for very few target countries (1–2). **EPO member states include:** Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Monaco, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Turkey, UK, Albania, Switzerland (+ further extension states under EPO extension agreements). **Note: Post-Brexit UK remains an EPO member, but EUIPO trademarks no longer cover the UK.**

Source: EPO member state list; EPC Art. 79

**The Unitary Patent (UP)** became available from June 1, 2023. After EPO grant, applicants can request UP status, valid across all participating UP member states (currently ~17, including Germany, France, Italy) without country-by-country validation. **UP advantages:** - Single annual fee (paid to EPO), covering all participating states - Unified litigation in the Unified Patent Court (UPC) **UP limitations:** - Not all EPO member states participate in UP (e.g., Spain, Switzerland, UK) — separate validation still required for these - The UPC is a new institution; applicants who prefer national courts can file an Opt-Out within 3 months of grant

Source: EU Unitary Patent Regulation (EU) No 1257/2012; UPC Agreement

EPO's official procedural languages are English (EN), French (FR), and German (DE). Applications must be filed in one of these three languages. If filed in another language (e.g., Chinese), a translation into an official language must be submitted within the required period (otherwise the application is deemed not to have been filed). EPO recommends filing in English for ease of search and examination. When validating in individual countries, local-language translations may be required within the validation deadline.

Source: EPC Art. 14

**Deadline:** 31 months from the priority date (EPO applies 31 months; some individual national phases also use 31 months). **Required steps:** - Pay the European phase entry fee (Euro fee + examination fee) - Submit a full translation in EN/FR/DE if the PCT application was in another language - Submit a letter of entry into the European phase within 31 months - Designate member states (all states may be designated initially; final validation choices made after grant)

Source: EPC Art. 22, Art. 153; WIPO PCT Applicant's Guide — EP

EPO examination stages: 1. **European Search** — EPO Search Division issues the European Search Report (ESR) and Written Opinion; for PCT applications, EPO typically already produced a search report at the PCT stage 2. **Substantive Examination** — Must be explicitly requested with fee payment 3. **Examining Division** — Handles OA exchanges with the applicant 4. **Grant or Refusal** — Upon grant, a European Patent (EP) is issued; next step is country-by-country validation (or UP request) EPO examiners generally focus on clarity and conciseness in independent claims; a narrower claim strategy may be appropriate in Europe.

Source: EPC Art. 92–102; EPO Guidelines for Examination

After EPO grant, the European Patent must be "validated" (registered) in each target designated state within the required national deadline (typically 3 months from grant publication). Validation typically requires: - Payment of national validation fee - Submission of local-language translation in some countries (France, Germany, Italy, Spain, etc.) - Appointment of a local representative in some countries **Failure to validate within the national deadline means the EP right in that country is permanently lost.**

Source: EPC Art. 65; national validation requirements

Within 9 months of grant, any party may file a Post-Grant Opposition with the EPO to revoke or amend the European Patent. This is a key feature of the EPO system — one opposition proceeding can affect the patent's validity across all validated countries. Common grounds: lack of novelty, lack of inventive step, insufficient disclosure. Oppositions typically conclude in 2–4 years (Opposition Division); further appeal to the EPO Technical Boards of Appeal (TBA) is available.

Source: EPC Art. 99–105; EPO Opposition Guide

EPO is a WIPO DAS participating and depositing office. Via DAS, applicants can authorize other DAS participating offices to retrieve priority documents from EPO electronically, without needing certified paper copies.

Source: WIPO DAS; EPO DAS information

EPO applications and patents require annual renewal fees from year 3 onwards. Fees are due within 3 months before the anniversary date; a 6-month late payment period applies with a surcharge. **After grant:** If UP is not requested, annual fees must be paid to each national office in validated countries (fees "transfer" to national level). If UP is requested, a single unified annual fee is paid to EPO.

Source: EPC Art. 86; EPO fee schedule; UP Regulation