Before initiating patent registration in India, it is essential to determine whether an idea qualifies as a patentable invention. Under Indian law, an invention must satisfy three key criteria: novelty, meaning it has not been disclosed anywhere in the world; inventive step, indicating it is not obvious to a person skilled in the relevant field; and industrial applicability, meaning it can be made or used in an industry. Certain subject matters, such as abstract ideas, mathematical methods, and business methods, are excluded from patentability. Early evaluation helps startups avoid unnecessary costs and delays.