If you have invented something new, the patent registration process in India is the way to turn it into a legally protected asset. A patent gives you the exclusive right to make, use, offer for sale, sell or import your invention in India for 20 years from the date of filing, in return for disclosing how it works to the public.
This guide explains how to file a patent in India from start to finish: what can be patented, which forms are needed, what happens at each stage, how long it takes, and the mistakes that most often weaken an application. Patents are granted under the Patents Act, 1970 and the Patents Rules, 2003, and administered by the Indian Patent Office.
The patent filing procedure in India at a glance
- Check patentability. Confirm your invention is new, inventive and capable of industrial application, and is not excluded by the Act.
- Search existing patents. Look for prior art before you spend money on drafting.
- Choose provisional or complete filing. A provisional specification helps secure an early date; a complete specification starts the path to grant.
- Draft the specification: description, claims, abstract and drawings.
- File the application. Online, at the Patent Office with territorial jurisdiction.
- Publication. Usually 18 months from the earliest priority date.
- Request examination. File Form 18, or Form 18A for expedited examination if eligible.
- Respond to the First Examination Report (FER). Resolve objections, attend a hearing if called.
- Grant and renewal. The patent is granted, published in the Patent Journal, and kept alive by annual renewal fees.
What is a patent, and who can apply?
A patent is a territorial right. A patent granted in India protects your invention only in India. In exchange for that exclusive right, the invention is published so others can learn from it.
Under Section 6 of the Patents Act, an application can be made by the true and first inventor, by a person to whom the inventor has assigned the right, or by the legal representative of a deceased inventor. Individuals, companies, startups, universities and research institutions can all apply, alone or jointly.
Step 1: Check whether your invention is patentable
In India, an invention must meet three tests:
- Novelty. It must not have been published, used or disclosed anywhere in the world before the filing date.
- Inventive step. It must involve a technical advance or have economic significance, or both, and must not be obvious to a person skilled in the field.
- Industrial applicability. It must be capable of being made or used in an industry.
Even if it passes all three tests, it must also avoid Sections 3 and 4 of the Act, which list things that are not patentable in India. Common exclusions include:
- Discoveries of scientific principles or of natural substances (Section 3(c))
- A new form of a known substance without a significant improvement in known efficacy (Section 3(d))
- A mere arrangement, rearrangement or duplication of known devices (Section 3(f))
- Methods of agriculture or horticulture (Section 3(h))
- Methods of medical treatment of humans or animals (Section 3(i))
- Mathematical or business methods, computer programs per se, and algorithms (Section 3(k))
- Inventions relating to atomic energy (Section 4)
Section 3(k) is where many software and app founders run into trouble. A computer program on its own is not patentable, but an invention that shows a technical effect or technical contribution, often in combination with hardware, can still qualify. Each case is judged on its own facts, so this is worth discussing with a patent professional before you assume software is out.
Step 2: Run a patent search
A patent search is not compulsory, but it is one of the most cost-effective steps in the filing process. It shows whether something similar already exists, helps you shape your claims, and saves you the cost of filing an application that is unlikely to succeed.
Useful free resources include the Indian Patent Advanced Search System (InPASS), Google Patents and the WIPO PATENTSCOPE database. A search by keywords and classification codes works better than searching by the product name alone, since earlier inventors may describe the same idea very differently.
Step 3: Decide between a provisional and a complete specification
If your invention is still under development, a provisional specification can be filed. This fixes your filing date, which is important because novelty is judged against that date. You then have 12 months to file the complete specification.
| Provisional specification | Complete specification | |
|---|---|---|
| Purpose | Secures an early filing date while the invention is still being developed | Fully describes the invention and defines its legal scope through claims |
| Claims required | No | Yes |
| Next step | Complete specification must be filed within 12 months | Moves to publication and examination |
| Can lead to grant | No, it is not examined on its own | Yes |
Step 4: Draft the specification
The specification is the core of your application. A complete specification usually includes:
- A title that describes the invention accurately
- Field and background explaining the problem and the existing solutions
- Summary of the invention
- Detailed description with enough information for a skilled person to carry out the invention, supported by drawings where needed
- Claims, which define exactly what you want protected
- Abstract, a short technical summary
Your claims are the deciding factor in how much protection you actually get. A narrow claim has a better chance of acceptance but is easier for competitors to design around, while a broad claim is more likely to be rejected. Most weak patents are weak because of the drafting, not because the invention lacks merit. This is why the drafting should be done by a registered patent agent or an advocate with technical experience.
One thing to keep in mind: do not disclose your invention before you file it. A conference talk or a social media launch can destroy novelty, and India's grace period covers only a few narrow kinds of disclosure. The best approach is to file first and disclose afterwards.
Step 5: File the application, forms and documents
Applications are filed online through the Indian Patent Office portal, with the Patent Office that has territorial jurisdiction, determined by the applicant's address or principal place of business. India has four patent offices: Mumbai, Delhi, Chennai and Kolkata. Applicants from Gujarat, for example, fall under the Mumbai office.
The forms you will commonly use:
| Form | Purpose |
|---|---|
| Form 1 | Application for grant of patent |
| Form 2 | Provisional or complete specification |
| Form 3 | Statement and undertaking about corresponding foreign applications (Section 8) |
| Form 5 | Declaration as to inventorship |
| Form 26 | Authorisation, if you file through a patent agent |
| Form 28 | Declaration of startup or small entity status, for reduced fees |
| Form 9 | Request for early publication (optional) |
| Form 18 | Request for examination |
| Form 18A | Request for expedited examination (eligible applicants) |
If you are claiming priority from an earlier application filed abroad, a priority document is also needed, along with the details in Form 3.
Step 6: Publication of the application
The Patent Office publishes the application in the Patent Journal 18 months after the earliest priority date. Early publication can be requested using Form 9 if you want the application to move more quickly.
Publication matters for two reasons. First, from that point the contents of your application are public. Second, it opens the door to pre-grant opposition by third parties, which we cover below.
Step 7: Request examination
An application is not examined automatically in India. A request for examination must be filed, using Form 18, within 31 months from the priority date (reduced from 48 months by the 2024 amendment). If that deadline is missed, the application is treated as withdrawn.
Certain applicants may request expedited examination using Form 18A. Eligible categories under the Rules include startups, small entities and certain other applicants, such as women applicants and government departments, as well as applicants who chose India as the International Searching Authority in a PCT filing. Expedited examination can shorten the wait considerably.
Step 8: The First Examination Report and prosecution
Once examination is requested, the application is assigned to an examiner, who prepares the First Examination Report (FER). The FER lists the objections, such as lack of novelty or inventive step, unclear claims, or exclusions under Section 3.
You must respond within six months of the FER, extendable by up to three months on request, and the application must be put in order for grant within the statutory period. A good FER reply does more than answer each objection: it may amend the claims, argue the inventive step with technical reasoning, and file supporting evidence where needed. If objections remain, the Controller may call you for a hearing before making a decision.
Missing a deadline at this stage can result in the application being treated as abandoned, so keep a close watch on every date.
Step 9: Pre-grant and post-grant opposition
Other parties can challenge your patent at two stages:
- Pre-grant opposition (Section 25(1)): after publication and before the patent is granted.
- Post-grant opposition (Section 25(2)): within one year from the date the grant is published.
A granted patent can also be challenged through revocation proceedings. If your application is opposed, you will need to file a reply and evidence, and the Controller will decide after a hearing.
Step 10: Grant, renewal and working statement
If all objections are resolved and no opposition succeeds, the Controller grants the patent, and the grant is published in the Patent Journal. The patent term is 20 years from the date of filing, not from the date of grant.
To keep the patent alive, you must pay renewal fees every year, starting from the third year. A patentee must also file a statement of working (Form 27), once every three financial years, to show how the patented invention is being worked in India. Missing a renewal fee causes the patent to lapse; failing to file Form 27 can attract a penalty.
How long does the patent registration process take?
The honest answer is that it varies. The main stages are:
- Filing to publication: about 18 months from the earliest priority date, unless early publication is requested.
- Examination: begins only after you request it. Expedited examination moves this stage faster.
- FER to grant: depends on how many objections are raised, how complex they are, and whether a hearing or opposition follows.
In practice, a standard application typically takes several years from filing to grant, while expedited examination can reduce that considerably. The time also depends on the technology field and the Patent Office's workload.
How much does it cost?
The total cost has two parts: official government fees, which differ for individuals, startups and small entities on the one hand and large entities on the other; and professional fees for searching, drafting and prosecution. Costs also build up over time, because examination, renewals, and any hearings or oppositions each carry fees.
Filing abroad: PCT and Section 39
Because a patent is territorial, protection in other countries needs separate filings. Under the Paris Convention, you have 12 months from your first filing to claim priority in other member countries, and the Patent Cooperation Treaty (PCT) lets you file one international application that can later enter the national phase in many countries.
Indian residents must keep Section 39 in mind. Before filing a patent application outside India for an invention made in India, you need written permission from the Controller, unless you first filed in India and six weeks have passed without a secrecy direction. Filing abroad without following this rule can be an offence and can affect the validity of the application.
Common mistakes to avoid
- Disclosing the invention before filing. This can destroy novelty.
- Skipping the prior art search. It is a small cost compared with the cost of a rejected application.
- Filing a thin provisional specification. The complete specification can only claim what the provisional supports.
- Poorly drafted claims. Too narrow gives weak protection; too broad invites rejection.
- Missing deadlines. Examination requests, FER replies and renewals all have strict deadlines.
- Ignoring Section 8 requirements. Applicants must keep the Patent Office updated about corresponding foreign applications.
Need help with patent registration?
Soni And Soni helps you check whether your invention is patentable, draft the provisional or complete specification, file and prosecute the application before the Indian Patent Office, and plan PCT or foreign filings. You can visit our patent registration page for more information.
