How to Enter the PCT National Phase in Greece (2026): Step‑by‑step, Documents & Fees

If you hold an international patent application filed under the Patent Cooperation Treaty (PCT) and need protection in Greece, you must enter the PCT national phase in Greece before a strict 30‑month deadline measured from your earliest priority date. The competent authority is the Hellenic Industrial Property Organization (OBI), which receives national‑phase filings and administers patent prosecution in Greece. WIPO’s PCT Applicant’s Guide for Greece, valid as from 1 January 2026, introduced updated formalities, including translation and filing requirements that every applicant should understand before the deadline arrives.

This guide explains how to enter the PCT national phase in Greece in 2026, covering every step, the documents needed, realistic costs, and the key changes that took effect at the start of the year.

Overview of the PCT National Phase in Greece and Who It Applies To

The “national phase” is the stage at which an international PCT application transitions from WIPO’s centralised system into the patent office of each country where the applicant wants enforceable patent rights. In Greece, the OBI national phase procedure requires the applicant, or their appointed local representative, to file a package of documents and fees within the statutory deadline.

This process applies to any natural or legal person who filed a PCT international application that designated Greece (or designated the European Patent Organisation, with a subsequent request for validation in Greece). It is relevant to foreign corporations, university technology‑transfer offices, individual inventors, and Greek nationals who used the PCT route rather than filing directly with OBI.

Applicants should note that the WIPO PCT eGuide entry for Greece now indicates that the direct national route has been closed, and applicants are referred to the National Chapter (EP) for national‑phase processing. The practical effect is that entering the national phase in Greece from a PCT application in 2026 typically proceeds through the Euro‑PCT route, entering the regional phase at the European Patent Office (EPO) under the 31‑month EPO deadline and then validating the resulting European patent in Greece. This article addresses both the procedural requirements at OBI for any residual national‑route obligations and the Euro‑PCT pathway that most applicants will follow.

National Phase Entry Requirements: Eligibility and Prerequisites

Before initiating national phase entry in Greece, applicants should confirm the following eligibility and prerequisites:

• Valid PCT international application. The application must have been properly filed and published under the PCT, and Greece (or the EP regional designation) must be among the designated states.
• Verified earliest priority date. The 30‑month clock runs from the earliest priority date claimed in the international application. If multiple priorities are claimed, the calculation starts from the earliest.
• Copy of the PCT international publication. Keep the WIPO publication number and a PDF of the published application readily accessible.
• Prosecution strategy decided. Determine whether to pursue patent protection in Greece through the Euro‑PCT route at the EPO (31‑month deadline) or to satisfy any residual direct national‑phase requirements at OBI (30‑month deadline). Industry observers expect that the vast majority of 2026 filings will use the Euro‑PCT route.
• Local representative appointed (if required). Foreign applicants without a domicile or establishment in Greece are generally required to appoint a local patent attorney or authorised representative for proceedings before OBI.

Addressing the national phase entry requirements for Greece early, ideally months before the deadline, prevents last‑minute complications with translation, power of attorney, and fee payments.

How to Enter the PCT National Phase in Greece: Step‑by‑Step Procedure

The following numbered steps set out the OBI national phase procedure and, where applicable, the parallel Euro‑PCT workflow that feeds into Greek patent protection in 2026.

Step 1, Confirm the Priority Date and Calculate the National‑Phase Deadline

Identify the earliest priority date from the PCT international application. The national phase deadline for Greece is 30 months from that date. For the Euro‑PCT regional phase at the EPO, the deadline is 31 months. Perform the date arithmetic carefully: a priority date of 15 March 2024, for example, produces a 30‑month deadline of 15 September 2026. Diarise both deadlines and build in a buffer of at least four to six weeks for document preparation.

Step 2, Decide the Filing Route: National (OBI) vs. Euro‑PCT (EPO)

Evaluate whether direct national filing at OBI remains available for your application or whether the Euro‑PCT route is the required pathway. According to WIPO’s PCT Applicant’s Guide for Greece (valid from 1 January 2026), the Office closed the direct national route and refers applicants to the National Chapter (EP). In practice, this means most applicants will enter the regional phase at the EPO and subsequently validate the granted European patent in Greece. A qualified intellectual property specialist can advise on the optimal route based on your commercial objectives, timeline, and budget.

Step 3, Prepare the Required Forms and Greek Translation

Assemble all documents required by the receiving office. If filing the direct national route at OBI, this includes a national‑phase request form (obtainable from OBI), a certified translation of the PCT application into Greek (description, claims, and abstract), and supporting documents listed in the table below. For the Euro‑PCT route, prepare EPO Form 1200 and the required translation of the claims into one of the EPO’s official languages if the PCT application was not published in English, French, or German. The Greek translation requirement for OBI purposes, flagged prominently in the 2026 WIPO eGuide update, remains essential for any direct national‑phase entry. Engage a professional translator experienced in patent specifications early to avoid delays.

Step 4, File the Power of Attorney and Priority Documents

The Power of Attorney (POA) authorises your local patent attorney to act on your behalf before OBI or the EPO. The POA should be signed by the applicant (or an authorised officer, if a legal entity) and, depending on OBI requirements, may need notarisation or an apostille. File certified priority documents alongside the POA. In many cases, the priority document can be made available electronically via WIPO’s Digital Access Service (DAS), removing the need for paper‑certified copies.

Step 5, Pay Official Fees and Submit Proof of Payment

All national phase fees must be paid on or before the filing deadline. For the OBI route, confirm the current fee schedule directly with the Hellenic Industrial Property Organization. For the EPO route, pay the filing fee, search fee (if required), and designation fee per the EPO Schedule of Fees. Retain the bank transfer receipt or online payment confirmation as proof and include it in the filing package. National phase fees in Greece are denominated in euros (EUR).

Step 6, Submit the Complete Filing Package to OBI or the EPO

Compile and submit the full package, forms, translation, POA, priority documents, and fee payment proof, to the correct office. Ensure the filing date recorded by the office falls on or before your 30‑month (OBI) or 31‑month (EPO) deadline. Electronic filing through the EPO’s Online Filing system is available for Euro‑PCT entries. For direct OBI filings, check whether OBI accepts electronic submission or requires physical filing at its offices in Athens.

Step 7, Receive Filing Confirmation and Monitor for Office Actions

After submission, OBI or the EPO will issue an acknowledgement of receipt confirming the filing date and reference number. Monitor correspondence for any formality objections, requests for amended translations, or invitations to correct deficiencies. OBI typically sets response deadlines of two to three months per office action. Missing a response deadline can result in the application being deemed withdrawn.

Documents Needed for the PCT National Phase in Greece

The following table lists the documents needed for PCT national phase entry in Greece, whether via the direct OBI route or the Euro‑PCT pathway with subsequent Greek validation. Applicants should treat this as a compliance checklist and confirm requirements with OBI or the EPO before filing.

Particular attention should be paid to the Greek translation requirement for PCT 2026 filings. WIPO’s PCT Applicant’s Guide for Greece (valid from 1 January 2026) states that the international application filed by a national of Greece must be accompanied by a translation into Greek. For foreign applicants entering the national phase, a certified Greek translation of the specification and claims is standard practice. Failure to provide a compliant translation by the deadline is one of the most common causes of formality deficiencies.

National Phase Deadline for Greece: Timeline and Key Deadlines

The critical deadline for entering the national phase in Greece is 30 months from the earliest priority date. This is the standard period prescribed by the PCT for designated offices that have not extended the deadline to 31 months. Greece applies the 30‑month limit for direct national‑phase entry at OBI. Applicants who use the Euro‑PCT route benefit from a 31‑month deadline for entry into the regional phase at the EPO.

Some offices worldwide apply a 31‑month time limit, but applicants targeting Greece through OBI must plan to the 30‑month deadline. Missing this deadline by even a single day can result in permanent loss of the right to obtain patent protection in Greece through the national route.

Worked Deadline Examples

Always verify your calculated deadline against the official rules published by OBI and WIPO. If the deadline falls on a day when the office is closed (weekend or public holiday), the applicable rules may extend the deadline to the next working day, but this should never be relied upon as a matter of course.

National Phase Fees in Greece: Costs and Tax Considerations

The total cost of entering the national phase in Greece depends on official government fees, translation costs, and professional attorney charges. The table below provides indicative ranges; applicants should verify current official OBI fee amounts directly with the Hellenic Industrial Property Organization, as these are subject to periodic adjustment.

All fees are denominated in euros. Foreign applicants should account for currency conversion costs and potential VAT on professional services. Attorney fees for prosecution beyond initial filing, responding to office actions, amendments, and appeals, are additional. Budget a cost contingency of 15–25 % above initial estimates to accommodate translation revisions and unforeseen formalities.

What Changed in the PCT National Phase for Greece in 2026

WIPO’s PCT Applicant’s Guide for Greece, valid as from 1 January 2026, introduced changes that directly affect applicants. The most significant update is the confirmation that the Office has closed the direct national route for PCT national phase entry. Applicants are now referred to the National Chapter (EP), meaning the standard pathway to Greek patent protection via a PCT application runs through the Euro‑PCT procedure at the EPO, followed by validation in Greece.

Additionally, the 2026 eGuide update reaffirms translation requirements: an international application filed by a national of Greece must be accompanied by a translation into Greek for national‑security purposes. Applicants filing through the Euro‑PCT route should check whether Greek‑language translation obligations arise at the validation stage under Greek national law.

If your PCT application’s 30‑month deadline straddles the 1 January 2026 change date, verify with OBI whether transitional provisions apply. Industry observers expect that applications entering the national phase after 1 January 2026 are governed by the new rules, but applicants with pending deadlines close to the transition date should seek confirmation from an IP lawyer in Greece.

Common Pitfalls When Entering the PCT National Phase in Greece, and How to Avoid Them

• Missing the 30‑month deadline. The most consequential error. Calculate the deadline immediately upon identifying Greece as a target jurisdiction and diarise it with a four‑to‑six‑week buffer for document preparation.
• Late or incomplete Greek translation. Patent specifications can run to dozens of pages. Engage a certified translator with patent experience as soon as the decision to file is made, not weeks before the deadline.
• Incorrectly formatted Power of Attorney. A POA that lacks proper notarisation, apostille, or the local attorney’s acceptance will trigger a formality objection. Use a template vetted by Greek counsel and confirm authentication requirements in advance.
• Under‑budgeting translation and counsel fees. Translation costs vary significantly with specification length. Obtain firm quotes early and include a contingency for revisions.
• Relying on outdated or non‑authoritative checklists. Rules change, as the 2026 WIPO update demonstrates. Always cross‑check document and fee requirements against the current WIPO PCT eGuide for Greece and the OBI official website.

Conclusion

Entering the PCT national phase in Greece in 2026 demands precise compliance with deadlines, translation requirements, and the procedural formalities confirmed by WIPO’s updated eGuide. Whether you proceed through the direct national route at OBI or, as the 2026 changes now direct, through the Euro‑PCT procedure at the EPO with subsequent Greek validation, the fundamentals remain the same: calculate your deadline early, prepare a certified Greek translation, assemble a complete filing package, and pay all fees before the clock runs out. Engaging a patent attorney in Greece well in advance of your deadline is the single most effective step you can take to protect your rights in this jurisdiction.

Sources

1. WIPO, PCT Applicant’s Guide: Greece (valid as from January 1, 2026)
2. Hellenic Industrial Property Organization (OBI), Official Website
3. European Patent Office, Euro‑PCT Guide
4. PatSnap, Patent Filing Deadline Calculator: PCT & National Phase
5. AnalystIP, Complete Guide to the Greece Patent Filing System
6. IIPLA, PCT National Phase in Greece Guide
7. Pintz & Partners, PCT Application