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What is a Patent?
A patent is an exclusive right granted by the government to an inventor for a new invention, product or process under the Patents Act, 1970. It gives the patent holder the right to prevent others from making, using, selling or importing the patented invention in India for 20 years from the date of filing.
Section 3 of the Patents Act, 1970 governs what can — and what cannot — be patented in India. Understanding these provisions is essential before investing time and resources in a patent application.
File before you disclose: Any public disclosure of your invention before the filing date permanently destroys novelty and makes the invention unpatentable. Always file a provisional or complete application before any public presentation, publication or commercial launch.
Three Criteria for Patentability
To be eligible for a patent in India, an invention must satisfy all three of the following criteria:
The invention must not have been previously published in any form, anywhere in the world. It must not have been publicly used or on sale in India for more than one year before the patent application date.
The invention must not be obvious to a person skilled in the relevant field. It must not be a mere variation of an existing invention — it must possess some level of inventiveness and technical advance.
The invention must be capable of being made or used in some kind of industry. It must have a practical application — purely theoretical concepts or mental processes are not patentable.
The invention must not fall under any of the excluded categories listed in Section 3 of the Patents Act, 1970 — which includes mathematical methods, business methods, computer programs per se and aesthetic creations.
Inventions That Cannot Be Patented
Section 3 of the Patents Act, 1970 lists several categories of inventions that are not eligible for patent protection in India:
- Inventions that are frivolous or contrary to public order, morality or health
- Mere discoveries of a scientific principle or the formulation of an abstract theory
- Mere discoveries of a new form, property or use of a known substance — unless it results in enhanced known efficacy
- Substances obtained by mere admixture without producing new properties or products
- Mere arrangement, rearrangement or duplication of known devices
- Methods of agriculture or horticulture
- Methods of treatment of human beings or animals — diagnostic, therapeutic or surgical
- Plants and animals in whole or any part thereof (other than microorganisms)
- Mathematical or business methods or computer programs per se or algorithms — Section 3(k)
- Aesthetic creations including literary, dramatic, musical or artistic works
- Presentation of information — merely presenting data in a new format
- Topography of integrated circuits
- Traditional knowledge or aggregation or duplication of known properties of traditionally known components
Software and Business Methods
Section 3(k) of the Patents Act, 1970 specifically provides that mathematical or business methods or a computer program per se or algorithms are not patentable in India. This is one of the most frequently misunderstood provisions.
However, computer-implemented inventions that have a technical character — software that controls a machine, improves hardware performance, or solves a technical problem with a technical effect — may be patentable. The key distinction is whether the software has a technical effect beyond the normal physical interactions of running software on hardware.
The Patent Application Process
- Prior Art SearchComprehensive search of existing patents and publications to assess novelty and inventive step before filing
- Provisional ApplicationFiled to secure priority date — 12 months to file complete specification. Ideal when the invention is still being developed
- Complete SpecificationFull patent specification with formal claims, detailed description, drawings and abstract filed within 12 months of provisional
- PublicationApplication published 18 months from priority date — becomes publicly available
- Request for ExaminationFiled within 48 months from priority date — triggers substantive examination by the Patent Office
- Examination & GrantPatent Office examines and may raise objections. Replies filed. Patent granted if examination is successful
Why Professional Advice Matters
Given the above requirements and exclusions under Section 3, it is essential for inventors to seek professional advice before filing a patent application. A prior art search, assessment of patentability, and proper claim drafting are critical to the success of a patent application.
A poorly drafted patent specification — particularly one with claims that are too narrow or fail to adequately capture the inventive concept — can result in a patent that offers little practical protection even if granted.
Frequently Asked Questions
What are the three requirements for patenting an invention in India?
An invention must satisfy three criteria under the Patents Act, 1970: first, novelty — it must not have been previously published or publicly used anywhere in the world before the filing date. Second, inventive step — it must not be obvious to a person skilled in the relevant field. Third, industrial applicability — it must be capable of being made or used in some kind of industry. All three criteria must be met simultaneously.
Can software be patented in India?
Software per se is not patentable under Section 3(k) of the Patents Act, 1970. However, computer-implemented inventions that have a technical character and produce a technical effect — such as software that controls industrial machinery, improves hardware performance, or solves a technical problem — may be patentable. The key is that the invention must go beyond the normal physical interactions of running software.
What inventions cannot be patented in India?
Section 3 of the Patents Act, 1970 excludes from patentability: frivolous inventions, mere scientific discoveries, new forms of known substances without enhanced efficacy, methods of treatment of humans or animals, plants and animals, mathematical or business methods, computer programs per se, algorithms, aesthetic creations, traditional knowledge, and inventions contrary to public order or morality.
How long does a patent last in India?
A patent in India is valid for 20 years from the date of filing the patent application — not from the date of grant. Annual renewal fees must be paid to keep the patent in force throughout the 20-year term. Failure to pay renewal fees results in the patent lapsing, after which the invention enters the public domain.
What is the difference between a provisional and complete patent application?
A provisional application is a preliminary filing that immediately secures the priority date without requiring formal patent claims — giving the inventor 12 months to develop the invention and file a complete specification. A complete application includes the full specification with formal claims, detailed description, drawings and abstract, and is required for the patent to proceed through examination and grant.
Official Resource: For authoritative information, visit Indian Patent Office, IP India.