Patent registration in India is the legal process of obtaining a 20-year exclusive right over a new invention by filing an application with the Indian Patent Office under the Patents Act, 1970. To be granted, the invention must be new (novel), involve an inventive step, and be capable of industrial application. The process runs from filing a specification, through publication and examination, to grant — and typically takes a few years rather than a few months.
If you are an inventor, founder, researcher or business weighing whether and how to protect a technology, this guide walks through patentability, the end-to-end patent registration process, and the important early choice between a provisional and a complete specification. It is general legal information, not advice on your specific invention.
What is a patent, and what law governs patent registration in India?
A patent is a statutory monopoly: in exchange for publicly disclosing how an invention works, the inventor receives the exclusive right to make, use, sell or import that invention for a limited term. In India this is governed primarily by the Patents Act, 1970 and the Patents Rules, 2003 (as amended, including the Patents (Amendment) Rules, 2024). The granting authority is the Office of the Controller General of Patents, Designs and Trade Marks (CGPDTM), with patent offices in Kolkata, Delhi, Mumbai and Chennai.
A note on changing law: patent law has not been re-codified the way criminal law was in 2023–24 (where the IPC became the BNS and the CrPC became the BNSS). The Patents Act, 1970 is still the governing statute. However, the Patents Rules and official fees are revised frequently (the 2024 amendments changed several timelines and the request-for-examination window). Always verify the current rule numbers, fees and deadlines on the official portal before relying on them.
Patentability: what can and cannot be patented in India
Before spending money on a filing, the threshold question is patentability. Section 2(1)(j) of the Patents Act defines an “invention” as a new product or process involving an inventive step and capable of industrial application. Broken down, an invention must satisfy three core tests:
| Patentability test | What it means | Statutory anchor |
|---|---|---|
| Novelty | The invention is new — not already disclosed anywhere in the world before the filing/priority date (“anticipation”). | S. 2(1)(j), S. 13 (search), S. 29–34 |
| Inventive step | A technical advance and/or economic significance that is not obvious to a person skilled in the art. | S. 2(1)(ja) |
| Industrial application | The invention can be made or used in some kind of industry. | S. 2(1)(ac) |
Even if those three are met, certain subject matter is expressly excluded from patentability under Sections 3 and 4. Common exclusions inventors run into:
- Mere discoveries, scientific principles or abstract theories (S. 3(a)–(c)).
- A new form of a known substance that does not enhance its known efficacy — the well-known “evergreening” bar in S. 3(d) (central to the Novartis litigation).
- Mere admixtures or mere arrangements of known devices (S. 3(e)–(f)).
- Methods of agriculture/horticulture, and methods of medical treatment of humans or animals (S. 3(h), S. 3(i)).
- Plants and animals in whole or any part thereof, other than micro-organisms (S. 3(j)).
- Mathematical or business methods, computer programs per se, and algorithms (S. 3(k)) — software patentability in India is narrow and fact-specific.
- Literary, dramatic, musical or artistic works (protected by copyright, not patents) (S. 3(l)).
- Inventions relating to atomic energy (S. 4).
This is why a professional patentability search before filing is worth it: it tells you whether your idea is genuinely novel and whether it sits inside an excluded category.
The patent registration process in India, step by step
Here is the typical patent registration process. The sequence is fixed by statute and the Patents Rules; the timelines below are indicative and should be confirmed against the current rules.
- Invention disclosure and patentability search. Document the invention fully and run a prior-art search to assess novelty and inventive step.
- Choose the route and file the application. File on Form 1 with a specification (provisional or complete — see below). Indian applicants who want to file abroad first generally need a foreign filing licence or to file in India first (S. 39).
- Provisional to complete (if applicable). If you filed a provisional specification, you must file the complete specification within 12 months (S. 9), or the application is treated as abandoned.
- Publication. The application is ordinarily published in the official journal after 18 months from filing/priority (S. 11A). Early publication can be requested on Form 9.
- Request for Examination (RFE). Examination is not automatic — you must file an RFE on Form 18 within the prescribed period. The 2024 Rules reduced this window (historically 48 months from priority; verify the current period, as it was shortened). No RFE in time = deemed withdrawal.
- Examination and First Examination Report (FER). A Controller examines the application and issues an FER listing objections (novelty, inventive step, S. 3 exclusions, clarity, etc.). The applicant must put the application in order for grant within the prescribed period from the FER.
- Response, hearing and (possibly) pre-grant opposition. The applicant responds to objections; a hearing may be held. Any person may file a pre-grant opposition under S. 25(1).
- Grant. If objections are met, the patent is granted and published. The term is 20 years from the date of filing (S. 53), subject to payment of annual renewal fees.
- Post-grant opposition / revocation. Within 12 months of grant, an interested person may file post-grant opposition (S. 25(2)); revocation can also be sought before the High Court (S. 64).
Expedited examination
A startup, small entity, woman applicant, or applicant choosing India as the International Searching Authority (among other categories) may request expedited examination under the Rules, which can compress the timeline considerably. Confirm current eligibility and fees.
Provisional vs complete specification: which should you file?
One of the earliest strategic decisions is whether to file a provisional or a complete specification. This is the “provisional vs complete” question inventors ask most often.
A provisional specification describes the invention but need not include claims; it secures an early priority date and buys you up to 12 months to refine the invention before filing the complete specification. A complete specification fully discloses the invention and must end with claims defining the scope of protection (S. 10).
| Factor | Provisional specification | Complete specification |
|---|---|---|
| Purpose | Lock in an early priority date while the invention is still developing | Fully disclose the invention and define the legal scope of the monopoly |
| Claims required? | No | Yes — claims are mandatory |
| Deadline trigger | Complete spec must follow within 12 months (S. 9) or application is abandoned | Examination proceeds on this document |
| Best when | Invention still evolving; you want an early date fast and cheaply | Invention is finalised; you are ready to define and defend the claims |
| Risk | If the final invention drifts beyond what was disclosed, the early date may not cover the new matter | Higher upfront cost and drafting effort |
In short: file a provisional when you need to plant your flag quickly on a still-developing invention, and a complete when the invention is settled and you want to move straight toward examination. The priority date is often decisive in a dispute, so the drafting of even a provisional should be taken seriously.
How long does patent registration take, and what does it cost?
Realistically, grant in India often takes 2 to 4+ years from filing, depending on the technology field, the examination backlog, the objections raised, and whether expedited examination is used. Official fees are tiered — natural persons, startups and small entities pay substantially less than large entities — and are set out in the First Schedule to the Patents Rules. Professional (attorney/agent) fees are separate. Because fees were revised in the 2024 amendments, check the current schedule on the official portal rather than older figures.
After grant: maintaining and enforcing the patent
A granted patent is not “set and forget.” Two things matter:
- Renewal. Annual renewal (maintenance) fees must be paid from the third year onward to keep the patent in force for the full 20 years; non-payment leads to lapse.
- Enforcement. A patentee can sue for infringement (S. 104 onward), seeking injunctions and damages or an account of profits. Patent infringement suits are typically filed in the District Court or, where invalidity is counter-claimed, the High Court. For founders, coordinating patent strategy with the rest of your IP and commercial paperwork early is far cheaper than litigating later — see our guide on IP protection for startups.
How this connects to your broader legal protection
Patents are one pillar of an IP portfolio that usually also includes trademarks, copyright and designs. Our intellectual property law practice advises inventors and businesses across that full spectrum. For the authoritative text of the statute, see the Patents Act, 1970 on India Code.
Frequently Asked Questions
What are the requirements for patentability in India?
The invention must be novel (new anywhere in the world), involve an inventive step (non-obvious to a skilled person), and be capable of industrial application — and it must not fall within the exclusions in Sections 3 and 4 of the Patents Act, 1970.
What is the difference between a provisional and a complete specification?
A provisional specification secures an early priority date and does not need claims, but a complete specification must follow within 12 months and must contain claims defining the scope of protection. A complete specification is the document on which the patent is examined and granted.
How long does the patent registration process take in India?
It commonly takes around 2 to 4 years or more from filing to grant, depending on the field, the examination backlog and any objections. Eligible applicants (such as startups, small entities and women applicants) can use expedited examination to shorten this.
How long is a patent valid in India?
A patent is valid for 20 years from the date of filing under Section 53 of the Patents Act, 1970, provided annual renewal fees are paid to keep it in force.
Is examination of a patent application automatic in India?
No. You must file a Request for Examination (Form 18) within the period prescribed by the Patents Rules. If you do not, the application is treated as withdrawn. The exact window was revised by the 2024 Rules, so confirm the current period.
Can software or a business method be patented in India?
Generally no. Section 3(k) excludes mathematical methods, business methods, algorithms and computer programs “per se.” Software-related inventions may be patentable only in narrow, fact-specific situations involving a genuine technical effect — specialist advice is essential.
What cannot be patented in India?
Among other things: mere discoveries and scientific principles, new forms of known substances without enhanced efficacy (Section 3(d)), methods of medical treatment, plants and animals (other than micro-organisms), software per se, and inventions relating to atomic energy (Section 4).
Can a patent be challenged after it is granted?
Yes. Any person can file a pre-grant opposition under Section 25(1), an interested person can file a post-grant opposition under Section 25(2) within 12 months of grant, and revocation can be sought before the High Court under Section 64.
This article is for general informational purposes only and does not constitute legal advice. Laws change and every situation is different; please consult a qualified advocate about your specific matter.
