Any natural person or legal entity, regardless of their nationality or country of residence, can obtain a Eurasian patent. The application can be filed directly as a regional application or by entering the Eurasian regional phase via the PCT route, provided all legal requirements are met.
PCT Regional Phase Entry in Eurasia
Enter the Eurasian regional phase of your PCT application before the Eurasian Patent Office (EAPO) with experienced Eurasian patent attorneys.
Patentica assists international applicants with obtaining a single Eurasian patent protecting inventions in Armenia, Azerbaijan, Belarus, Kazakhstan, Kyrgyzstan, Russia, Tajikistan, and Turkmenistan. Our Eurasian patent attorneys review the application, check deadlines and filing requirements, coordinate the Russian translation, prepare and file the regional phase entry documents, represent applicants before the EAPO and support prosecution through substantive examination, grant and post-grant maintenance.
Reviewed by Victor Lisovenko: Patent Attorney, Lawyer, Co-managing Partner
Quick facts about Eurasian (EAPO) Regional Phase Entry
Review the core procedural parameters, time limits, and territorial coverage for entering the Eurasian regional phase from a PCT application.
| Item | Key Information | Important Notes |
| Service | PCT regional phase entry before the Eurasian Patent Office | Also searched as EAPO PCT national phase, Eurasian PCT regional phase, PCT entry in Eurasia, Eurasian Patent Office national phase |
| Competent Authority | Eurasian Patent Office (EAPO) | Established by the Eurasian Patent Organization |
| Coverage | 8 countries: Armenia, Azerbaijan, Belarus, Kazakhstan, Kyrgyz Republic, Russian Federation, Tajikistan and Turkmenistan | A single granted patent provides protection across all member states, no validation is needed |
| Filing Deadline | 31 months from the earliest priority date | Reinstatement of missed deadline is possible within 12 months |
| Required Language | Russian | The application must be translated into Russian upon or within 2 months after entry |
| Power of Attorney (POA) | Required for applicants that have neither residence nor principal place of business in an EAPC contracting state | Required within 2 months |
| Patent Term | 20 years | Calculated from the International filing date |
| Patentica handles | Full-cycle management: deadline monitoring, document review, expert Russian translation, filing, EAPO representation, examination support, Office Action responses, grant-stage and maintenance guidance, licensing, and IP litigation | Backed by 29 years of experience across 50+ technical fields. Applications are handled by dedicated patent attorneys tailored to your industry requirements. |
What is PCT regional phase entry in Eurasia?
PCT regional phase entry in Eurasia is the step by which an international PCT application is continued before the Eurasian Patent Office. Instead of filing and prosecuting separate national patent applications in several Eurasian
countries, the applicant proceeds through one regional EAPO procedure.
This service is relevant after the international phase of the PCT application, when the applicant decides where to continue prosecution. The EAPO regional route is particularly useful when protection is desired in several EAPC contracting states and the applicant wants one filing, one examination process and one regional patent grant procedure.
Patentability Requirements for Eurasian Inventions
To obtain a Eurasian patent, an invention must meet the standard international criteria evaluated during the substantive examination before the EAPO:
- Novelty
The invention must be completely new and not part of the prior art anywhere in the world before the priority date. - Inventive Step
The solution must not be obvious to a person skilled in the art. It should offer a non-trivial technical advancement. - Industrial Applicability
The invention must be capable of being used or manufactured in industry, agriculture, health care, or other fields.
Note for PCT applicants: If your invention has already received a favorable International Preliminary Report on Patentability (IPRP), it significantly increases the chances of a smooth substantive examination in the EAPO.
Who needs PCT regional phase entry in Eurasia?
This service is intended for applicants who have already submitted an international PCT application and wish to continue the patenting process through the Eurasian Patent Office.
Unlike filing a new patent application from scratch, regional phase entry is based on your existing international application. The objective is to transfer that application into the Eurasian patent system while complying with all procedural requirements and deadlines.
Our clients include international corporations, foreign patent attorneys, universities, research institutions and individual inventors seeking protection across multiple Eurasian countries.
Key benefits of Eurasian Patent over National Patents
The Eurasian regional phase allows applicants to pursue patent protection through one regional EAPO procedure instead of managing separate national filings in each country.
Key advantages include:
- Single regional filing
One regional application before the EAPO can cover 8 EAPC contracting states.
- One Language
Only Russian translation is needed instead of multiple local translations
- One prosecution strategy
The application is handled through one regional examination procedure rather than several parallel national examinations. Claim amendments, office action responses and prosecution decisions can be coordinated centrally.
- Post-grant flexibility
After grant, applicants can maintain the Eurasian patent in selected EAPC states by paying the corresponding annual fees. No patent validation in every country is needed.
- Cost efficiency
Up to 4 times cost reduction comparing with 8 national patents.
How Patentica handles PCT regional phase entry in the EAPO
Patentica manages the regional phase entry as a complete prosecution workflow: from the first deadline review and quoting to filing, formalities, EAPO communication, substantive examination and grant-stage support.
1. Initial review of the PCT application for the document and cost issues
At this stage, Patentica conducts a comprehensive analysis of the application materials, including priority data, applicant details, claims, and PCT amendments. We meticulously review all available international phase documents to ensure compliance with the EAPO formal requirements.
If the patent claims can be optimized to reduce official filing fees or examination fees, we proactively inform the client. Upon approval, our team prepares an amended set of claims to streamline the process.
Client Benefit: Proactive risk mitigation and significant reduction of official patent fees, where possible.
2. Filing the application with the EAPO
Patentica prepare, format, and file the regional phase application with the EAPO. We ensure the accurate and timely settlement of all mandatory official filing fees according to the client’s instructions.
Immediately upon successful submission, we provide a comprehensive filing report containing official publication dates, application numbers, and an optimized schedule for subsequent patent prosecution workflows.
Client Benefit: Seamless, risk-free entry into the EAPO procedure with guaranteed compliance and full transparency.
3. Russian Translation for PCT Applications
The official language of the Eurasian Patent Office is Russian. If a PCT application is entered into the EAPO regional phase in a foreign language, the Russian translation of the patent application materials must be submitted within 2 months from the regional phase entry date. This term can be extended for a further 2 months subject to payment of an extension fee.
At Patentica, this critical step is handled by qualified in-house patent translators who possess advanced technical backgrounds in the specific field of the invention (biotech, IT, mechanics, chemistry, etc.) and deep knowledge of Eurasian patent law. To guarantee absolute technical accuracy and legal compliance, every translation undergoes a rigorous double-check by registered Eurasian patent attorneys before it is officially filed with the EAPO.
Client Benefit: Flawless technical accuracy, mitigation of risks related to translation-induced scope alterations, and strict compliance with EAPO statutory deadlines.
4. Formal examination support at the EAPO
During the EAPO formal examination, the patent office may issue standard procedural inquiries or clarifications. At Patentica, we meticulously handle all EAPO formal communications to ensure swift resolution. More often than not, these procedural steps are already identified during our Initial Review (Stage 1), allowing us to prepare responses efficiently or address them post-filing, strictly in accordance with the client’s tactical instructions.
Client Benefit: Seamless management of official actions, keeping the application moving through the formal phase without unnecessary delays.
5. Substantive examination support & EAPO Office Actions
At this critical stage, Patentica offers a completely tailored strategy driven by the client’s specific business goals. While our primary focus is to defend the maximum possible scope of patent protection, we remain fully adaptable to the client’s instructions: if you prefer to narrow the claims to facilitate a smoother and faster prosecution, we execute this approach with equal precision.
Patentica timely requests the EAPO substantive examination and monitors all strict statutory deadlines. Upon receipt of any EAPO Office Actions, our team promptly forwards and translates them, followed by a rigorous legal and technical analysis. Upon receiving the client’s instructions, we prepare and file the official response along with any necessary amended claims or specifications, providing a detailed filing report immediately.
Client Benefit: Professional, high-stakes support through the core patent prosecution phase, aimed at safeguarding your invention’s commercial value while ensuring full compliance with EAPO deadlines.
6. Eurasian Patent Grant Stage & Issuance Support
Upon receiving the EAPO’s notice of intention to grant, Patentica manages the final administrative phase with strict attention to detail. We carefully review the received official materials, meticulously cross-checking them against the last filed and amended materials. If any clerical errors, typos, or discrepancies are identified, we immediately communicate with the patent office to ensure they are corrected before the final printing.
Prior to settling the grant fees, we always review the case to ensure the timely filing of any divisional applications, if required by the client’s patent strategy.
Additionally, Patentica coordinates the timely payment of the patent grant fees and publication fees, secures the physical Eurasian patent certificate, and safely dispatches it to the client.
Client Benefit: Prevention of future enforcement risks due to typos, and hassle-free certificate delivery.
7. Eurasian Patent Maintenance & Annuity Management
To keep a Eurasian patent in force, mandatory annual maintenance fees (annuities) must be paid every year following the patent publication. The total annuity amount is highly flexible, as it depends directly on the selection of specific EAPO contracting states (out of the 8 member countries) where the client requires continuous legal protection. Patentica provides comprehensive patent annuity tracking and deadline monitoring. We issue timely reminders to the client well in advance of the due dates. Upon receiving explicit instructions, our team handles the precise calculations, settles the required maintenance fees directly with the EAPO, and delivers a detailed compliance report immediately.
Client Benefit: Cost-effective, customizable protection across selected regions, with zero risk of accidental patent lapse thanks to proactive deadline management.
Requirements for the EAPO entry
To initiate the EAPO regional entry procedure, applicants need to submit a complete set of application materials, including the Russian translation of the patent application, lodge a Power of Attorney (POA), and arrange for the settlement of the mandatory official fees.
Below is a structured guide detailing the specific document specifications, statutory deadlines, and fee parameters required for a compliant submission.
Required documents for PCT regional phase entry in Eurasia
The exact documentation depends on the circumstances of your application. Before filing, our attorneys review the international application and advise which documents are required to complete the regional phase entry.
In most cases, applicants should prepare the following:
- PCT application number;
- Names and addresses of applicant(s) and inventor(s) (unless the application is published);
- Description, claims, abstract, and drawings (unless the application is published);
- Power of Attorney executed by the applicant;
- Amendments made after the international publication (if any);
- Amendments to be made during the regional phase entry in the EAPO.
If any of your formal documents are incomplete or require specific corrections, you do not need to delay your submission. Patentica’s team will assist you in drafting proper assignments, formatting templates, and organizing materials to ensure full compliance with EAPO formal requirements while completely protecting your priority date.
Key Deadlines for PCT Regional Phase Entry in Eurasia
The key filing deadline to enter the Eurasian regional phase for a PCT application is strictly 31 months from the earliest priority date. While certain procedural steps, such as submitting Russian translations or settling specific official fees, possess inherent grace periods and extension options, applicants are strongly advised not to rely on late remedies without case-specific legal guidance from a registered Eurasian patent attorney.
Below is a structured overview of the critical statutory time limits and EAPO deadlines governing the regional phase entry and subsequent patent prosecution workflows:
| Prosecution Stage | Statutory Deadline | Available Extensions & Grace Periods | Official EAPO Patent Instruction Rule Reference |
| Eurasian regional phase entry (PCT application) | 31 months from the earliest priority date. | No general extension available for entering the phase. The application can be restored within 12 months. Reasons for omission must be provided. Generally, the EAPO is quite lenient. | Rule 71(1), Rule 71(6) |
| Submission of Russian translation | 2 months from the EAPO receipt date if the application is entered in a foreign language | Can be extended for a further 2 months (4 months total from receipt) subject to an extension fee. | Rule 71(3), Rule 21¹(6) |
| Filing amended / reduced set of claims to reduce the official fees | 2 months from the date of regional application receipt. | Strict deadline. | Rule 21¹(6¹) |
| Request for substantive examination | At the time of regional phase entry | Patentica files the request at the time of entry to prevent the fee increase. | Rule 71(1), Rule 71(3),
Item 2(iv) of the Statute on Fees of the Eurasian Patent Organization |
| Responding to examination Office Actions | Within the time limit set by the EAPO in the relevant communication. Generally, 4 months from the date the Office Action was dispatched by the EAPO. |
Can be extended by filing a request before expiry, up to a maximum of 24 months per request, subject to payment of the extension fees. | Rule 49(4), Rule 37(2) |
| Payment of patent grant fees | Within 4 months from the date the EAPO notice of readiness to grant is dispatched to the applicant. | A grace period of a further 2 months is granted, subject to the payment of an additional surcharge fee. | Rule 47(3) |
| Filing divisional applications | Any time during prosecution, but strictly before the date of official registration of the parent Eurasian patent. | No extensions are possible once the parent patent is registered. It is highly recommended to file prior to paying the grant fees. | Rule 49(4) |
EAPO official fees and what affects the costs
Navigating the costs of Eurasian patent protection requires a clear understanding of the EAPO official fees. The ultimate financial quote for a regional phase entry is never fixed; it completely depends on the specific technical parameters of your application.
At Patentica, we analyze your PCT materials during our Initial Review (Stage 1) to accurately calculate the baseline costs and identify opportunities for optimization. The total government fee is determined by the following core factors:
- The Number of Patent Claims
- The Basic Filing Fee: The standard unified procedural fee covers up to 5 claims and is set at 70,000 RUB.
- Surcharges for Extra Claims:
- For every claim from the 6th to the 20th: 7,000 RUB per claim.
- For every claim from the 21st to the 50th: 7,500 RUB per claim.
- For every claim beyond the 50th: 8,000 RUB per claim.
- The Number of Independent Claims in Substantive Examination
- Independent Claims Surcharge: The basic substantive examination fee covers only one independent claim and is set at 70,000 RUB.
- Group of Inventions: If the application contains a group of inventions, a significant extra fee of 40,000 RUB is levied for the second independent claim, and a rate of 25,000 RUB applies for every subsequent independent claim thereafter.
- Page Count Surcharges (The Document Length)
- Filing Phase: There are no additional page-count penalties during the initial regional phase entry.
- Grant Phase: The standard Eurasian patent issuance fee is 45,000 RUB and covers a document up to 35 pages (including specifications, claims, drawings, and abstract). Starting from the 36th page, a strict surcharge of 500 RUB per page is applied.
Valuable EAPO Fee Reductions (Discounts)
The EAPO rewards prior international work and specific applicant statuses:
- International Search Discount: If the PCT application already includes an International Search Report (ISR) prepared by the EAPO itself, the unified procedural filing fee and the independent claim examination fees are reduced by 40%.
- Other Search Reports: If a search report was conducted by another competent international authority, a 25% discount is granted instead.
- Applicant Status Reductions: Natural persons (individuals) from non-EAPO member states are entitled to a 50% discount on core procedural, examination, and grant fees.
All fees are listed in accordance with the official Statute on Fees of the Eurasian Patent Organization.
Emergency EAPO Filings & Priority Date Protection
The 31-month EAPO deadline is strict, but approaching it with incomplete documentation is manageable. If your deadline is close, you do not need to wait for every single document or translation to be fully finalized.
The most critical step is to contact Patentica immediately and provide us with your PCT application number to initiate the entry procedure.
Our team operates a rapid-response emergency workflow. We will guide you through the absolute minimum requirements needed to secure the filing date right away. Any missing formal documents or outstanding translations can be successfully submitted later by utilizing available statutory grace periods under EAPO regulations.
This strategic approach ensures your application is lodged safely without jeopardizing the priority date, while proactively avoiding unnecessary procedural surcharges and keeping your expenses optimized.
Why choose Patentica for PCT regional phase entry in Eurasia?
Patentica regularly represents international applicants before the Eurasian Patent Office and understands the practical expectations of foreign associates, in-house IP teams and applicants entering the EAPO regional phase for the first time:
∙ direct experience with Eurasian patent filings and EAPO prosecution;
∙ Eurasian patent attorneys and prosecution specialists working with foreign applicants and associates;
∙ clear communication in English and practical guidance on EAPO procedure;
∙ transparent quotes separating official fees, translation costs and professional fees;
∙ support from regional phase entry through examination, grant and maintenance;
∙ quality-controlled prosecution workflows and portfolio monitoring.
Global Recognition & Regional Leadership
Top-tier international IP rankings confirm Patentica as a trusted partner for regional patent prosecution in Eurasia and the CIS.
Rankings & Certification
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TOP-3 Patent Firm by EAPO Filings
Patentica holds a position of regional volume leadership by the total number of patent applications filed with the Eurasian Patent Office.
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IP STARS Recognition
View sourcePatentica is officially featured as a recommended firm in the prestigious IP STARS international guide to IP law firms.
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Leaders League Rankings
View sourcePatentica is highly recommended by the Leaders League directory among leading domestic law firms and IP agencies for regional patent prosecution.
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WIPR Patent Leaders
View sourcePatentica practitioners have been recognized as Patent Leaders and Trademark Leaders by World IP Review.
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Cross-Border IP Awards
View sourcePatentica was honored as an Outstanding International IP Service Team (2025) by China IP Today and named a Laureate of the regional IP Award 2025.
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ISO 9001:2015 Certification
Patentica maintains an ISO 9001:2015 certified quality management system, demonstrating its commitment to consistently high standards of quality and client service.
Frequently asked questions
Foreign applicants without a residence or principal place of business in a Contracting State must be represented by a registered Eurasian patent attorney.
After filing, the application undergoes formal examination followed by substantive examination before the Eurasian Patent Office. During this process, official communications may be issued and responses may be required before a patent can be granted.
Missing the 31-month EAPO deadline requires immediate emergency action. Entry into the regional phase is only possible if you successfully request a restoration of patent rights, which is subject to a strict time limit: the petition must be officially filed within 12 months from the expiry of the missed deadline.
To revive the application, the applicant must prove that the delay was unintentional and settle the prescribed official restoration fee. Once this 12-month window closes, reinstatement becomes legally impossible under any circumstances.
If your deadline has already passed, every day counts. We strongly urge you to contact our Eurasian patent attorneys immediately so we can evaluate your specific timeline and swiftly lodge the reinstatement petition before your rights are permanently forfeited.
An EAPO application can be officially deemed withdrawn due to several standard procedural omissions, including:
- Failure to submit the certified Russian translation within the initial 2-month window.
- Missing the deadline for paying mandatory official filing fees or the substantive examination fee.
- Failure to respond to an Examination Office Action within the strict 4-month limit.
If your application has been abandoned, immediate legal assessment is required. At Patentica, our Eurasian patent attorneys will thoroughly analyze the official EAPO notifications and the specific causes of the omission. Depending on the timeline, we will do our absolute best to restore the application by utilizing statutory reinstatement procedures, preparing robust petitions to prove unintentional delay, and filing compliant responses to get your case back on track.
Please contact us immediately with your application number so we can check the available options before the statutory restoration windows expire.
According to the EAPO annual report, the average time for a first action of substantive examination in 2025 stands at 2 months (compared to 6.5 in 2024), the average time for subsequent examination procedures is 2.65 months (down from 2.8 months in 2024).