What Can Be Patented in India? Eligibility, Exclusions and Examples

Applicants tend to focus on whether their invention is new. In India, novelty is only the first hurdle, and Section 3 exclusions defeat more applications than novelty does.

Quick answer

To be patentable in India an invention must be novel, involve an inventive step, and be capable of industrial application — and must not fall within the exclusions in Sections 3 and 4 of the Patents Act.

The three tests

Novelty. The invention must not have been disclosed anywhere in the world before your priority date — in patents, papers, product launches, conference talks or online. Indian novelty is absolute; there is no general grace period comparable to some other jurisdictions.

Inventive step. Under Indian law this means a feature involving technical advance compared to existing knowledge, or having economic significance, or both — and not obvious to a person skilled in the art. The bar is higher than novelty: something can be new and still obvious.

Industrial application. The invention must be capable of being made or used in an industry. Purely theoretical constructs fail here.

The exclusions that catch people out

Section 3 lists matter that is not an invention at all. The ones that most often surprise applicants:

• 3(a) — inventions contrary to natural laws. Perpetual-motion machines, in practice.
• 3(b) — inventions contrary to public order, morality, or seriously prejudicial to human, animal, plant life or the environment.
• 3(c) — mere discovery of a scientific principle, or discovery of a living thing or non-living substance occurring in nature. Finding something is not inventing it.
• 3(d) — mere discovery of a new form of a known substance without enhancement of known efficacy. This is the provision that shapes Indian pharmaceutical patenting.
• 3(f) — mere arrangement or rearrangement of known devices each functioning independently. Bolting two known things together is not enough.
• 3(k) — mathematical or business methods, computer programmes per se, and algorithms.
• 3(i) — methods of medical, surgical, curative or diagnostic treatment of humans or animals.
• 3(j) — plants and animals in whole or part, other than micro-organisms, and essentially biological processes.
• 3(p) — traditional knowledge, or aggregation of known properties of traditionally known components.

Worked examples

• A new mechanical linkage in a textile machine that reduces thread breakage. Likely patentable — technical, industrially applicable, no exclusion engaged.
• An app that helps users split restaurant bills. Likely excluded under 3(k) as a business method implemented in software, unless there is a genuine technical contribution.
• A newly isolated compound found in a plant, with no modification. Likely excluded under 3(c) as a discovery of a naturally occurring substance.
• A known drug in a new salt form with no improved efficacy. Likely excluded under 3(d).
• A machine-learning method that reduces sensor power consumption in hardware. Arguably patentable — the technical effect is on the device, not merely in the computation.
• A surgical technique. Excluded under 3(i), though an instrument used to perform it may be patentable.

A quick self-check before you file

• Has anything about this been published, presented, sold or demonstrated anywhere?
• Would someone skilled in this field consider the key feature an obvious next step?
• Does the invention produce a technical effect, or is the contribution purely commercial or presentational?
• If software is involved, what does it change technically — beyond running faster on a normal computer?
• If it is a new form of a known substance, is there demonstrable improved efficacy?

How MYCrave can help

The patentability search and written opinion exists precisely to answer this question before you spend on filing. Where an invention is genuinely excluded we say so — and often there is another route, whether design registration, copyright or trade-secret protection.

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