{"id":1660,"date":"2026-06-28T06:47:12","date_gmt":"2026-06-28T06:47:12","guid":{"rendered":"https:\/\/www.perspireip.com\/blog\/euro-pct-regional-phase-entry-guide\/"},"modified":"2026-06-28T06:47:12","modified_gmt":"2026-06-28T06:47:12","slug":"euro-pct-regional-phase-entry-guide","status":"publish","type":"post","link":"https:\/\/www.perspireip.com\/blog\/euro-pct-regional-phase-entry-guide\/","title":{"rendered":"Euro-PCT Regional Phase Entry: 6 Steps to the EPO"},"content":{"rendered":"\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li class=\"\"><a href=\"#what-euro-pct-regional-phase-entry-actua\">What Euro-PCT Regional Phase Entry Actually Means<\/a><\/li><li class=\"\"><a href=\"#the-31-month-deadline-that-drives-everyt\">The 31-Month Deadline That Drives Everything<\/a><\/li><li class=\"\"><a href=\"#when-the-epo-performs-a-supplementary-eu\">When the EPO Performs a Supplementary European Search<\/a><\/li><li class=\"\"><a href=\"#the-rule-161-communication-a-deadline-hi\">The Rule 161 Communication: A Deadline Hiding in Plain Sight<\/a><\/li><li class=\"\"><a href=\"#if-you-miss-the-deadline-further-process\">If You Miss the Deadline: Further Processing<\/a><\/li><li class=\"\"><a href=\"#after-entry-what-the-european-phase-look\">After Entry: What the European Phase Looks Like<\/a><\/li><li class=\"\"><a href=\"#how-perspireip-can-help-with-euro-pct-en\">How PerspireIP Can Help With Euro-PCT Entry<\/a><ul><li class=\"\"><a href=\"#t1\">What is the deadline for Euro-PCT regional phase entry?<\/a><\/li><li class=\"\"><a href=\"#t2\">Do I file with each European country or just the EPO?<\/a><\/li><li class=\"\"><a href=\"#t3\">When does the EPO charge a supplementary search fee?<\/a><\/li><li class=\"\"><a href=\"#t4\">What is the Rule 161 communication and why does it matter?<\/a><\/li><li class=\"\"><a href=\"#t5\">Can I still enter Europe after the 31-month deadline?<\/a><\/li><li class=\"\"><a href=\"#t6\">Do I have to request examination separately at entry?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>Your PCT application bought you up to 31 months of breathing room. Now Europe is calling, and the route is different from filing in any single country. Instead of entering a dozen national offices, you enter one regional office, the EPO, which then prosecutes a single application covering 39 member states. <strong>Euro-PCT regional phase entry<\/strong> is procedurally simple but deadline-driven and easy to fumble, because several acts must be completed inside the 31-month window or the application lapses. This guide walks the six steps, the fees, and the Rule 161 trap that quietly catches applicants who think entry is just a form.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-euro-pct-regional-phase-entry-actua\">What Euro-PCT Regional Phase Entry Actually Means<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig1.jpg\" alt=\"Euro-PCT regional phase entry routing a PCT application into Europe\" class=\"wp-image-1657\" srcset=\"https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig1.jpg 1200w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig1-300x169.jpg 300w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig1-1024x576.jpg 1024w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig1-768x432.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Photo: <a href=\"https:\/\/commons.wikimedia.org\/w\/index.php?curid=97850905\" rel=\"nofollow noopener\" target=\"_blank\">North American P-51B Mustang 1943 (45115616912)<\/a> by Falcon\u00ae Photography from France, France (<a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/2.0\/\" rel=\"nofollow noopener\" target=\"_blank\">CC BY-SA 2.0<\/a>)<\/figcaption><\/figure>\n\n\n\n<p><strong>Euro-PCT regional phase entry<\/strong> is the process of taking an international (PCT) application into Europe through the European Patent Office, which acts as a regional office for its contracting states. Rather than entering each country&#8217;s national phase separately, you make a single entry at the EPO, and one examination decision flows out to every state you later validate.<\/p>\n\n\n\n<p>This is what distinguishes the European route from, say, <a href=\"https:\/\/www.perspireip.com\/blog\/pct-national-phase-entry-us\">PCT national phase entry in the US<\/a>, where you file directly with the USPTO. For most applicants targeting multiple European markets, the regional route through the EPO is cheaper and simpler than entering the United Kingdom, France, Germany, and others individually, because you defer the per-country cost until grant.<\/p>\n\n\n\n<p>The mechanics are governed by the EPC and the PCT working together: the PCT sets the international framework and the 30\/31-month entry window, and the EPC fills in the European-specific acts. Get the interplay right and entry is routine. Miss one required act inside the deadline and the consequences are severe, which is why the steps below matter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"the-31-month-deadline-that-drives-everyt\">The 31-Month Deadline That Drives Everything<\/h2>\n\n\n\n<p>The headline rule: you must enter the European regional phase within 31 months of your earliest priority date. The EPO sets the limit at 31 months, one month longer than the PCT&#8217;s baseline 30, and this single date organizes the entire entry.<\/p>\n\n\n\n<p>By the 31-month deadline, you generally must complete these acts:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>File a translation<\/strong> of the international application into English, French, or German if it was not published in one of those languages.<\/li><li><strong>Specify the application documents<\/strong> (as originally filed or as amended under PCT Article 19 or 34) on which the European procedure is to be based.<\/li><li><strong>Pay the filing fee<\/strong> (and the page fee for applications over 35 pages).<\/li><li><strong>Pay the designation fee<\/strong> covering the EPC contracting states.<\/li><li><strong>Pay the examination fee and file the request for examination<\/strong>.<\/li><li><strong>Pay the supplementary search fee<\/strong>, where a supplementary European search is required, and any renewal fee already due for the third year.<\/li><\/ol>\n\n\n\n<p>Confirm the current amounts on the EPO <a href=\"https:\/\/www.epo.org\/en\/applying\/fees\" target=\"_blank\" rel=\"noopener\">schedule of fees<\/a> before you instruct payment. Two clarifications save real money: the request for examination must be actively filed, it is not automatic, and renewal fees keep accruing from the third year counted from the international filing date, so a renewal can fall due almost immediately on entry.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"when-the-epo-performs-a-supplementary-eu\">When the EPO Performs a Supplementary European Search<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig2.jpg\" alt=\"Euro-PCT regional phase entry supplementary European search examiner review\" class=\"wp-image-1658\" srcset=\"https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig2.jpg 1200w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig2-300x169.jpg 300w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig2-1024x576.jpg 1024w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig2-768x432.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Photo: <a href=\"https:\/\/commons.wikimedia.org\/w\/index.php?curid=2787829\" rel=\"nofollow noopener\" target=\"_blank\">File:Benz Patent Motorwagen Engine.jpg<\/a> by LSDSL (<a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/2.0\/de\/deed.en\" rel=\"nofollow noopener\" target=\"_blank\">CC BY-SA 2.0<\/a>)<\/figcaption><\/figure>\n\n\n\n<p>One fee turns entirely on who searched your PCT application during the international phase. If the EPO acted as your International Searching Authority (ISA), it has already searched the case, so no supplementary European search is carried out and the supplementary search fee is not due. That is a meaningful saving and a common reason to choose the EPO as ISA at filing.<\/p>\n\n\n\n<p>If a different office (for example, the USPTO or KIPO) acted as ISA, the EPO performs a supplementary European search on entry, and the supplementary search fee applies. The resulting supplementary European search report often raises objections under European standards that the original ISA did not, particularly on unity of invention and added matter under Article 123(2) EPC.<\/p>\n\n\n\n<p>Practical takeaway: know who your ISA was before you budget for entry, because it changes both the fees you owe and the kind of examination you should expect. Applicants moving between systems are often surprised by how differently the EPO assesses the same claims, a theme we explore in <a href=\"https:\/\/www.perspireip.com\/blog\/uspto-vs-epo-patent-requirements\">USPTO vs EPO patent requirements<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"the-rule-161-communication-a-deadline-hi\">The Rule 161 Communication: A Deadline Hiding in Plain Sight<\/h2>\n\n\n\n<p>Soon after entry, the EPO issues a communication under Rule 161\/162 EPC. This is the trap that catches even experienced filers, because the response period is just six months and it is easy to assume nothing needs doing.<\/p>\n\n\n\n<p>What Rule 161 requires depends on who handled the international phase:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>If the EPO was the ISA or IPEA<\/strong> and raised objections in the written opinion or international preliminary examination report, you are invited under Rule 161(1) to correct those deficiencies and may amend the application within six months. A response is effectively mandatory; ignoring a negative opinion can cost you the application.<\/li><li><strong>If the EPO was not the ISA<\/strong>, Rule 161(2) gives you a one-time opportunity to amend within six months before the supplementary search, which is the cleanest moment to tailor claims to European practice.<\/li><li><strong>Excess claims fees under Rule 162<\/strong> become payable if your claims exceed 15, calculated at the Rule 161 stage.<\/li><\/ul>\n\n\n\n<p>Treat the Rule 161 communication as a real deadline, not noise. Voluntary amendments here are free of official charge and let you delete problem claims, address the EPO&#8217;s earlier objections, and shape the case before substantive examination begins. Squandering it usually means dealing with the same problems later under tighter constraints.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"if-you-miss-the-deadline-further-process\">If You Miss the Deadline: Further Processing<\/h2>\n\n\n\n<p>Miss the 31-month deadline or omit one of the required acts, and the application is deemed withdrawn. The European system, fortunately, offers a safety net the US national phase largely lacks: further processing under Rule 135 EPC.<\/p>\n\n\n\n<p>When the EPO notices a missing act, it issues a communication noting the loss of rights. You then have a set period to request further processing by completing the omitted act and paying a further-processing fee (typically a surcharge calculated on the fee that was missed, or a flat fee for non-payment acts). In practice this can push effective entry a couple of months beyond the 31-month date.<\/p>\n\n\n\n<p>Do not treat further processing as a planning tool. It costs money, it is not available for every deadline, and relying on it signals a docketing problem waiting to become a malpractice claim. The disciplined approach is to diarize the 31-month date the moment the PCT application publishes and to confirm every required act is queued well in advance. If a more fundamental deadline is missed, the far harder remedy of re-establishment of rights under Article 122 EPC may be the only option, and it demands proof of all due care.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"after-entry-what-the-european-phase-look\">After Entry: What the European Phase Looks Like<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig3.jpg\" alt=\"Euro-PCT regional phase entry leading to European patent examination and grant\" class=\"wp-image-1659\" srcset=\"https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig3.jpg 1200w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig3-300x169.jpg 300w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig3-1024x576.jpg 1024w, https:\/\/www.perspireip.com\/blog\/wp-content\/uploads\/euro-pct-regional-phase-entry-guide-fig3-768x432.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Photo: <a href=\"https:\/\/commons.wikimedia.org\/w\/index.php?curid=61175383\" rel=\"nofollow noopener\" target=\"_blank\">Informal meeting of ministers for employment, social affairs, family and gender equality (iEPSCO). Handshake and welcome Jevgeni Ossinovski, Maxime Cerutti and Kaia Iva (35181453404)<\/a> by EU2017EE Estonian Presidency (<a href=\"https:\/\/creativecommons.org\/licenses\/by\/2.0\/\" rel=\"nofollow noopener\" target=\"_blank\">CC BY 2.0<\/a>)<\/figcaption><\/figure>\n\n\n\n<p>Once you are validly in the regional phase, the application is prosecuted like a direct European filing. The EPO examines it against the EPC, issues examination reports, and, if the case is allowable, moves to grant. Expect roughly three to five years from entry to grant, depending on the technology and the backlog.<\/p>\n\n\n\n<p>From there, the path is the standard European one: the Examining Division issues a Rule 71(3) &#8220;intention to grant&#8221; notice, you approve the text and pay the grant fee, and the patent is granted as a bundle of national rights. Our walkthrough of the <a href=\"https:\/\/www.perspireip.com\/blog\/epo-grant-procedure-guide\">EPO grant procedure<\/a> covers that stage in detail, including the post-grant choice between a Unitary Patent and classic national validation.<\/p>\n\n\n\n<p>The strategic point worth holding onto: regional phase entry is a gateway, not a finish. The decisions you make at entry, which language, whether to amend under Rule 161, how many claims to carry, ripple through years of examination and into the cost of every country you eventually validate. Spend the planning time at the 31-month mark, because it is the cheapest place in the whole process to fix a problem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-perspireip-can-help-with-euro-pct-en\">How PerspireIP Can Help With Euro-PCT Entry<\/h2>\n\n\n\n<p>Europe rewards applicants who enter the regional phase deliberately rather than at the last minute. PerspireIP helps applicants and counsel manage the 31-month docket, calculate and pay the right entry fees, decide whether to amend at the Rule 161 stage, and align claims with EPO practice before examination starts. <a href=\"https:\/\/www.perspireip.com\/contact\">Talk to our team<\/a> about taking your PCT case into Europe cleanly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">Frequently Asked Questions<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"t1\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">What is the deadline for Euro-PCT regional phase entry?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>31 months from the earliest priority date. The EPO grants one extra month over the PCT&#8217;s baseline 30-month period. All required acts, translation, fees, and the request for examination, must generally be completed by that date.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"t2\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Do I file with each European country or just the EPO?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Just the EPO. For most applicants the European regional phase is entered once at the European Patent Office, which prosecutes a single application for all designated states. You only deal with individual countries later, when you validate the granted patent.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"t3\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">When does the EPO charge a supplementary search fee?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Only when the EPO was not the International Searching Authority for your PCT application. If the EPO was the ISA, it already searched the case, so no supplementary European search is performed and that fee is not due.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"t4\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">What is the Rule 161 communication and why does it matter?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>It is the EPO&#8217;s invitation, issued shortly after entry, to amend the application and, where the EPO was the ISA or IPEA, to respond to objections in the written opinion. You have six months. Missing it can cost you the application or your best chance to amend for free.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"t5\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can I still enter Europe after the 31-month deadline?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Sometimes. Further processing under Rule 135 EPC lets you complete a missed act against a fee after the EPO notes the loss of rights, often pushing effective entry a couple of months later. It is a safety net, not a planning tool.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"t6\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Do I have to request examination separately at entry?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Yes. The request for examination is not automatic on regional phase entry. You must actively file it and pay the examination fee, generally by the 31-month deadline (or within the Rule 70 period if later), or the application will be deemed withdrawn.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Taking a PCT application into Europe means one route, one office, and one unforgiving 31-month deadline. Here is exactly what the EPO needs and when.<\/p>\n","protected":false},"author":2,"featured_media":1661,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[305,337,320,63,319],"class_list":["post-1660","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-patent","tag-epo","tag-european-patent","tag-national-phase","tag-patent-prosecution","tag-pct"],"_links":{"self":[{"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/posts\/1660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/comments?post=1660"}],"version-history":[{"count":0,"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/posts\/1660\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/media\/1661"}],"wp:attachment":[{"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/media?parent=1660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/categories?post=1660"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.perspireip.com\/blog\/wp-json\/wp\/v2\/tags?post=1660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}