Recent changes in the PCT are making it a more attractive option for applicants seeking international patent protection. A significant advantage is that applicants can extend the 12-month priority period by an additional 18 months by filing an international application. The PCT also offers various options for applicants to have their applications searched and undergo preliminary examination during the international phase, allowing for a clearer understanding of potential patent protection before entering the national/regional phase. Since January 1, 2009, supplementary international searches have been available, accommodating the growing diversity of languages in prior art documents. Compared to European applications, international applications under the PCT have notable benefits, including the absence of a claims fee, enabling applicants to include over 15 claims without additional costs. This is particularly beneficial for complex inventions, allowing for comprehensive claims without limiting the application’s scope. Additionally, in cases of non-unity of invention, applicants are invited to pay extra search fees, ensuring thorough searching and examination in the international phase. Despite these advantages, the complex structure of PCT rules can lead to challenges in addressing related questions, as contentious issues are determined by member states. This book aims to provide a practical overview of the PCT, addressing es
