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Novelty, inventive step, and industrial applicability — the three tests every application has to clear, and what each one actually means in practice.
Before you spend on drafting and filing, it helps to know what the patent office is actually looking for. In India, as in most jurisdictions, an invention has to clear three tests to be granted a patent. None of them is about how clever the idea feels — they are about how it compares to everything that came before it.
Novelty
An invention is novel if it has not been disclosed anywhere in the world before your filing date — not in an earlier patent, not in a journal, not in a product on sale, and not in your own conference talk. Public disclosure by the inventor counts against the application in India, so the sequence matters: file first, publish second.
Inventive step
Novelty alone is not enough. The invention also has to be non-obvious to a person skilled in the field — someone who knows the existing technology but has no inventive imagination of their own. A change that any competent engineer would have made when faced with the same problem does not clear this bar.
Most applications that fail do so on inventive step, not novelty. The prior art rarely describes your exact invention — it describes something close enough that reaching yours was an obvious next move.
Industrial applicability
Finally, the invention has to be capable of being made or used in some kind of industry. This is a low bar for most technologies, but it rules out purely theoretical results and things that cannot actually be built.
What is excluded outright
Section 3 of the Patents Act lists subject matter that is not patentable regardless of how novel or inventive it is. The categories that come up most often:
- Mere discoveries of a scientific principle or a naturally occurring substance
- A new form of a known substance that does not improve its known efficacy
- Methods of agriculture or horticulture
- Methods of medical treatment of humans or animals
- A mathematical or business method, or a computer program as such
- Presentation of information
A patentability search early in the process tells you where your idea sits against these tests before you commit to the full cost of an application. It is the cheapest point at which to change direction.