While this might sound daunting, the international patent system provides efficient mechanisms for managing the process. By using the Patent Cooperation Treaty (PCT) and strategic filing approaches, you can secure broad international protection in a staged and cost-effective manner.
How the PCT system works
The Patent Cooperation Treaty (PCT) is an international agreement that simplifies the process of seeking patent protection in multiple countries. Rather than filing separate applications in each country from the outset, the PCT allows you to file a single international application that preserves your rights in over 150 member countries.
The PCT application does not itself result in a granted patent. Instead, it serves as a centralised filing and examination mechanism that delays the need to commit to individual country filings until up to 30 or 31 months from your original priority date.
The PCT is not a patent — it is a filing mechanism that buys you time and provides centralised examination before you commit to country-by-country filings.
During the PCT phase, an international search authority conducts a prior art search and issues a written opinion on the novelty and inventive step of your claims. This feedback is valuable in assessing your prospects and refining your claims before entering the national phase.
National phase entry
At the end of the PCT period, you must "enter the national phase" in each country where you want patent protection. This involves filing a national application in each chosen jurisdiction, typically through a local patent attorney, and paying the associated fees. Each application then proceeds through examination independently under the laws of that country.
The deadline for national phase entry is generally 30 months from the priority date, though some jurisdictions allow 31 months. Missing this deadline typically means the application is treated as withdrawn in that country, so careful planning is essential.
Paris Convention priority
The Paris Convention for the Protection of Industrial Property provides another important mechanism for international filings. Under this convention, once you file a patent application in one member country, you have 12 months to file in other member countries while claiming priority from your original filing date.
This means that any publications or disclosures that occur after your original filing date cannot be used as prior art against your later filings in other countries. The Paris Convention priority right is what makes the staged approach possible — starting with a provisional application in Australia and then expanding internationally within the 12-month window.
Choosing countries strategically
Not every inventor needs patent protection in every country. The choice of jurisdictions should be driven by your commercial strategy. When selecting countries, consider the following categories:
- Consumer markets: Countries where your product will be sold to end users. The United States, Europe, Japan, and Australia are typically the most commercially significant consumer markets for many products.
- Producer markets: Countries where competitors are most likely to manufacture infringing products. China and India are common examples. Filing in producer markets can give you the ability to stop infringing goods at the source.
- Home market: Australia, where your business is based and where you are most likely to encounter direct competition. Protecting your home market is usually a priority regardless of your international strategy.
Choose patent jurisdictions based on where your product is sold, where it could be manufactured by competitors, and where your business operates.
The right combination of countries depends on your specific product, industry, and commercial plans. We work with clients to develop a filing strategy that balances the breadth of protection against the investment required.
Key jurisdictions
The following jurisdictions are among the most commonly pursued by Australian inventors seeking international patent protection:
United States: The world's largest consumer market and a critical jurisdiction for most commercially significant inventions. The US patent system is well-established with robust examination and enforcement mechanisms.
Europe: Patent protection across Europe can be obtained through the European Patent Office (EPO), which grants European patents that can be validated in individual member states. Since 2023, the European Unitary Patent system has provided an additional option — a single patent with effect across participating EU member states, currently covering 18 countries including Germany, France, Italy, the Netherlands, and others. The Unified Patent Court (UPC) provides a single court for enforcement and revocation proceedings across these states. Countries not covered by the Unitary Patent, such as Spain and the United Kingdom, require separate national validation.
China: As a major manufacturing hub, China is strategically important for preventing unauthorised production. The Chinese patent system has seen significant development in recent years, with improving examination quality and strengthened enforcement.
Australia: Your home market. IP Australia administers patent examination and grant, with expedited examination available where needed.
Japan: An important market in many technology sectors, with a thorough examination process and well-respected patent office.
Direct filing countries
While the PCT system covers the vast majority of commercially important jurisdictions, a small number of countries are not PCT members and require direct patent applications to be filed. The most notable examples are Argentina and Taiwan.
For these countries, a patent application must be filed directly within the 12-month Paris Convention priority period from your original filing date. If protection in these jurisdictions is commercially important, this timing needs to be factored into your overall filing strategy.
The staged approach to international protection
The international patent system is designed to allow a staged approach that manages both risk and investment:
- Months 0–12: File a provisional application in Australia, establishing your priority date and beginning commercialisation
- Month 12: File a PCT application to extend international protection and undergo centralised examination
- Months 30–31: Enter the national phase in your chosen countries, informed by commercial progress and PCT examination results
This structure means you do not need to commit to the full cost of international patent protection from the outset. Decisions about which countries to pursue are made at each stage based on evolving commercial information. For more detail on this timeline, see our guide to the patent application process.
Next steps
If you are considering international patent protection for your invention, contact Patentec for a complimentary consultation. We can assess your invention, discuss which jurisdictions are most relevant to your commercial strategy, and recommend a filing approach that makes sense for your situation.
To learn more about the PCT process, visit our page on PCT patent applications.