Strategic Consideration for Choosing National Phase Countries under the PCT System

Introduction : With the increase in technology and the advent of innovation driven economy, businesses are increasingly seeking patent protection beyond the domestic markets to safeguard their commercial interests. The investors and businesses utilize the Patent Cooperation Treaty (PCT) system, which provides for a single international application, deferring the need to file separate applications in different jurisdictions. Filing a Patent Cooperation Treaty (PCT) application is only the beginning of an international patent journey, not its conclusion. While a PCT application buys time and preserves the option to seek protection across 158 contracting states, the enforceable rights that matter commercially are created only when an applicant successfully enters the national phase in each chosen jurisdiction. The selection of national phase countries is the most important and consequential decision in IP Management involving substantial expenditures, i.e., filing fees, local attorney charges, maintenance expenses and examination fees. Therefore, an evaluation of certain factors is required before choosing national phase countries, as a well-reasoned national phase strategy can anchor a company’s market exclusivity for up to 20 years; a poorly conceived one results in wasted filing costs and unprotected exposure in commercially critical territories.

The present blog examines the key strategic considerations involved in choosing national phase countries under the PCT System and provides a comprehensive framework to guide applicants through this critical decision of choosing national phase countries.

Conceptual Understanding of National Phase Entry under PCT System

The World Intellectual Property Organization (WIPO) administers the Patent Cooperation Treaty (PCT), an international treaty that has more than 150 contracting nations, including Australia. It allows inventors and businesses to file a single “international” patent application to seek protection in multiple countries. While the PCT does not award patents, it does simplify the initial patent application procedure in several jurisdictions.

By filing a PCT application, applicants can postpone the requirement to file individual patent applications in various countries for up to 30 or 31 months after the priority date. This extended period allows inventors to assess the commercial viability of their invention, secure funding, and decide in which countries they want patent protection. However, the PCT does not grant foreign patents. According to Article 11(3) of the PCT, an international application has the same effect as a regular national filing in each designated state; nevertheless, this filing effect must be perfected by national phase entry before it can mature into an enforceable patent.

Entry into the national phase is not a mere procedural formality but a jurisdiction-specific process that requires applicants to satisfy a range of legal and administrative requirements. It depends upon the country or regional patent office involved; it generally includes: -

• Filing
• Payment of the fees (examination, search etc. wherever applicable)
• Submissions of the translations
• Appointment of the local attorney
• Filing of the national forms (Form 18 for Request for Examination in India; Form PCT/RO/101 as the initial request form at the international stage)

Key Factors For Choosing National Phase Countries

Selecting the right PCT countries is a crucial step in maximizing the effectiveness of your patent strategy. Here are some key factors to consider when making your choices:

Market Size and Revenue Potential : The most fundamental question is: where will the patented technology generate commercial value? Protection in a jurisdiction makes commercial sense when the patented product or process is likely to be sold, licensed, or exploited there in meaningful volumes. Applicants should assess current market opportunities as well as projected growth potential before deciding where to pursue patent protection. The five largest patent-filing jurisdictions globally i.e., the United States, China, Europe (via the EPO), Japan, and South Korea correspond to the world’s largest technology markets and should form the default foundation for most applicants pursuing high-value innovations. However, the optimal country list varies significantly by technology sector and the businesses should decide accordingly.

Business Goals : One of the most important factors in choosing national phase countries is the applicant’s overall business strategy and commercial objectives. Patent protection should be sought in the jurisdictions that support the applicant’s current operations, as well as its long-term growth plans. Hence, the selection of countries should be based on the target markets, anticipated expansion plans, licensing goals, strategic alliances, investment opportunities, and revenue generation potential. For example, a company seeking to establish a good position in the market in a particular country might want to secure patent protection in the country, even if the short-term commercial returns are limited. Similarly, countries with strong commercial ecosystems and intellectual property protection will be attractive to companies seeking investors or licensees for their technology. Applicants can make sure that their patent portfolio is a strategic asset underpinning commercialisation, competitive positioning and sustainable growth by aligning national phase decisions with broader business goals.

Manufacturing Locations : Patent protection at the place of manufacture is often overlooked but is strategically critical for two reasons i.e., firstly it prevents infringement upstream stopping a competitor from manufacturing a product within a jurisdiction, even if the product is exported elsewhere and secondly, it enables customs enforcement against infringing goods at the point of production before they enter international supply chains. Where a product requires different components to be manufactured in multiple countries, the businesses and applicants should choose protection in each of the manufacturing hub. For example- China is the global manufacturing hub accounting for at least 28% of the global manufacturing output ( 2024), making it a near-universal consideration for product patents regardless of primary sales markets.

Costs and Expenses : While market potential, enforcement quality, and competitive dynamics shape the ideal filing geography in theory, financial constraints ultimately determine what is achievable in practice. A detailed evaluation of the cost structure of national phase entry including government official fees, local attorney charges, filing fee, examination fee, etc. all needs to be kept in mind while selecting the national phase country as it is a core component of the responsible patent strategy. The costs could be categorised into the following distinct categories: -

• Official Government Fees
• Translation Costs
• Local attorney/patent agent charges
• Annuity and the maintenance fee

For example, in India for the foreign businesses, total initial entry costs including official fees, examination request, and local attorney charges typically range between USD 1,500 and USD 3,500, placing it among one of the most economical nations. A practical and sound approach is to prepare a list of country-by-country cost projections covering the full 20-year patent lifecycle and not just national phase entry costs.

Jurisdictional Differences : It is critical to select countries with solid legal and economic frameworks. Patents are long-term investments, so understanding the legal framework of the country you are choosing becomes important. Every country has a different legal framework and rules for PCT Applications and national phase countries. For example, what constitutes an inventive step in one country may not be considered innovative in another.

Analysis of Competitor Filings : Patent Strategy involves studying where the competitors have filed patents. For example, if a key competitor has filed in a particular jurisdiction, let's say, Brazil, Germany etc., repeatedly, then those jurisdictions represent a commercially significant market worth protecting. But where no competitor has filed in a country, it signals either weak enforcement or limited market potential.

Recent Regulatory Developments : The applicants need to be vigilant regarding the emerging regulatory developments which can significantly affect their patent application. For example, the Unified Patent Court (UPC) (2023) has been operational, creating a centralized litigation forum for European patents in participating EU member states and it allows for patent protection across numerous EU countries with a single application, potentially lowering costs and administrative difficulties.

Procedural Considerations And Common Mistakes

Missing Important Deadlines : The missing of the national phase deadline is considered fatal to the patent application. In cases where the national phase deadlines were “unintentional” or occurred despite “due care”, reinstatement of rights is possible as per PCT Rule 49.6 but it varies country to country. One needs to check the official rules and procedure of every individual country one is applying to.

Patent Prosecution Highway (PPH) : The Patent Prosecution Highway (PPH) programme allows applicants to fast-track national phase examination in a PPH-participating office if the ISA or IPEA has found claims to be patentable. PPH is accessible between significant offices, such as the USPTO, AU, EPO, NZ, JPO, CNIPA.

Regional Phase Entry : Businesses and applicants targeting multiple countries in a region should consider regional phase offices instead of specifically applying in every single country within the specified region. Examples of Regional Offices include EPO, GCC Patent Office, ARIPO (Africa), EAPO (Eurasian), etc.

Claim Priority Date : Priority may be claimed from an earlier national or international application under the 12-month rule through the PCT system. However, numerous applicants neglect to submit the appropriate priority data or fail to meet the deadline altogether.

Conclusion

Selecting national phase countries is one of the most consequential decisions in the lifecycle of an international patent application, and yet it remains one of the most underestimated. By the time a PCT application approaches its national phase deadline, the applicant has already invested considerably in developing and protecting the underlying invention. That investment deserves a country selection process that is deliberate, well-reasoned, and grounded in commercial reality, not one driven by instinct or a blanket approach of filing in as many jurisdictions as possible.

It must be appreciated that every country added to a national phase list represents a financial obligation that does not end at entry. Official fees, local counsel charges, translation requirements, and annual renewal fees continue to accrue over the life of the patent, which can extend up to twenty years. When these costs are aggregated across multiple jurisdictions without sufficient commercial justification, the result is an expensive portfolio that looks substantial on paper but delivers limited practical value. Responsible patent strategy demands that each jurisdiction earn its place on the list.

The foundation of a sound national phase strategy lies in asking the right questions at the right time and considering every single relevant factor affecting the commercial interest i.e., market size, revenue return, manufacturing location, legal framework of the country. It is also worth recognising that the international phase of a PCT application offers tools and intelligence that are frequently underutilised at the national phase stage. Regional patent offices, where applicable, offer a practical and cost-efficient alternative to filing in individual countries across a region.

These mechanisms exist to assist applicants in managing the process more effectively, and a well-advised applicant will make full use of them. It could be said that the national phase country selection is not a procedural formality to be completed under deadline pressure, it is a strategic exercise that warrants careful analysis, informed counsel, and clear alignment with the applicant’s broader commercial objectives. The strength of an international patent portfolio is not measured by the number of countries it covers, but by the precision and foresight with which those countries were chosen.

Author :- Tamanna, in case of any query, contact us at Global Patent Filing or write back us via email at support@globalpatentfiling.com.

Endnotes

1. Patent Cooperation Treaty art. 22, June 19, 1970, 1160 U.N.T.S. 231 (as amended).
2. World Intellectual Property Organization, PCT Applicant's Guide (Introduction to the National Phase).
3. World Intellectual Property Organization, Enter the National Phase.
4. Agreement on Trade-Related Aspects of Intellectual Property Rights arts. 27–34, Apr. 15, 1994, 1869 U.N.T.S. 299.
5. Paris Convention for the Protection of Industrial Property arts. 4 & 4bis, Mar. 20, 1883, as revised at Stockholm on July 14, 1967, 828 U.N.T.S. 305.
6. World Intellectual Property Organization, PCT Applicant's Guide: Introduction to the International Phase (2026 ed.)