You have invented something new. Something that works, solves a problem, and does something no existing product or process does quite the same way. Now you want to protect it before you show it to anyone — a manufacturer, an investor, or the market.
Filing a patent in India is the right instinct. But the patent filing procedure is one of the most technically demanding processes in Indian IP law. The specification alone — the document that defines exactly what your invention is and what protection you are claiming — can take weeks to draft correctly, and an error at that stage cannot always be corrected later.
This guide explains the full procedure step by step — who can file, which forms to use, what the fees are, every critical deadline, and what happens from filing to grant. By the end you will know exactly what is involved and where professional help is non-negotiable.
Who Can File a Patent Application in India?
Under Section 6 of the Patents Act, 1970, a patent application can be filed by:
- The true and first inventor of the invention
- An assignee of the inventor — a company or individual to whom the inventor has assigned the rights
- The legal representative of a deceased inventor or assignee
Applications can be filed individually or jointly by multiple applicants. A company can file a patent application if the inventor has assigned the rights to it — which is standard practice for employee inventions under employment agreements.
Foreign applicants can also file for patent protection in India — either directly under the Patents Act or through the international Patent Cooperation Treaty (PCT) route. A registered patent agent in India is required for foreign applicants.
What Can Be Patented in India?
Before spending time and money on a patent application, confirm that your invention is actually patentable under Indian law.
Under Section 2(1)(j) of the Patents Act, 1970, an invention must satisfy three conditions:
Novelty — the invention must be new. It must not have been disclosed anywhere in the world — in any publication, patent, product, or public use — before the filing date. This is why confidentiality before filing is critical. Even a conference presentation, a social media post, or a conversation with a supplier without an NDA can destroy novelty.
Inventive step — the invention must not be obvious. It must involve a technical advancement or economic significance that would not be obvious to a person skilled in the relevant field. Something that is a routine or predictable modification of existing knowledge does not qualify.
Industrial applicability — the invention must be capable of being made or used in some kind of industry. It must have a practical application — not be purely theoretical.
What Cannot Be Patented in India
Section 3 of the Patents Act, 1970 lists inventions that are not patentable in India regardless of how novel they are. The most commonly relevant exclusions are:
- Pure software and computer programs as such — Section 3(k). Code and algorithms alone are not patentable. However, a software-hardware combination that produces a specific technical effect may qualify.
- Business methods and mathematical methods — Section 3(k). Business models, financial processes, and mathematical formulas are excluded.
- Discoveries — Section 3(d) and 3(e). Discovering a new property of a known substance, or a new form of a known substance without enhanced efficacy, is not patentable. This is particularly important in pharmaceuticals.
- Mere new use of a known substance — Section 3(d). Finding a new use for an existing drug compound without proving enhanced therapeutic efficacy does not qualify.
- Plants and animals — Section 3(j). Biological organisms in their natural state are excluded, except microorganisms.
- Medical treatment methods — Section 3(i). Methods of treating humans or animals are not patentable, though medical devices and diagnostic instruments can be.
- Atomic energy inventions — Section 4 in conjunction with the Atomic Energy Act, 1962.
Step 1 — Conduct a Prior Art Search
Before drafting or filing anything, conduct a thorough prior art search to determine whether your invention is genuinely novel.
Prior art is any publicly available information — published patents, academic papers, products, public demonstrations, or prior uses anywhere in the world — that existed before your filing date. If your invention is already disclosed in any prior art, it lacks novelty and cannot be patented.
Where to search:
- Indian Patent Office database at ipindia.gov.in — searchable by keyword, inventor name, and classification
- Google Patents — comprehensive global patent database
- Espacenet — the European Patent Office’s global patent search database
- US Patent and Trademark Office (USPTO) database at patents.google.com
- WIPO PATENTSCOPE — for international PCT applications
A prior art search is not a luxury — it is the foundation of everything that follows. A professional prior art search and patentability opinion from a registered patent agent before filing can save significant time and expense.
Step 2 — Decide Between Provisional and Complete Application
This is one of the most important strategic decisions in the patent filing process.
Provisional Application
A provisional application under Section 9 of the Patents Act, 1970 allows you to secure a priority date — your legal filing date — before your invention is fully developed.
Benefits:
- Secures your priority date immediately, before anyone else can file a similar invention
- Gives you 12 months to develop and refine the invention before filing the complete specification
- Allows you to use the phrase “patent pending” in your disclosures and investor discussions
- Lower government fee than a complete application
What it must contain:
- Title of the invention
- Description of the invention — enough to enable a person skilled in the field to understand what you have invented
- Best method of working the invention, to the extent known at the time of filing
- Drawings (not mandatory but strongly recommended where applicable)
Critical rule: A complete specification must be filed within 12 months of the provisional application. If not filed within 12 months, the application is deemed abandoned under Section 9(1) of the Act. There is no extension.
Complete Application
A complete application under Section 10 of the Patents Act, 1970 is the full patent application containing all required elements. You can file a complete application directly — without a provisional — if your invention is fully developed.
A complete specification must contain:
- Title of the invention
- Field of the invention
- Background — a description of the prior art and the problem your invention solves
- Summary of the invention
- Detailed description — a full, enabling disclosure sufficient for a person skilled in the field to reproduce the invention
- Claims — the legally operative part of the patent. Claims define the exact scope of protection you are seeking. Drafting claims is the most technically and legally complex part of the entire application.
- Abstract — a brief summary of the invention
- Drawings — where applicable
- Sequence listing — for biological inventions
The claims are the heart of every patent. Everything else in the specification supports the claims. Poorly drafted claims either fail to cover what you actually invented, or are drafted so broadly that they fail the novelty or inventive step test and are rejected by the examiner. Claims drafting is a specialist skill — it is the single most important reason to work with a registered patent agent or attorney.
Step 3 — Determine the Correct Patent Office
India has four patent office locations. Your application must be filed with the office having jurisdiction over your residence, domicile, or principal place of business:
| Location | Jurisdiction |
|---|---|
| Mumbai | Maharashtra, Gujarat, Madhya Pradesh, Goa, and Union Territories of Daman & Diu and Dadra & Nagar Haveli |
| Delhi | Delhi, Haryana, Himachal Pradesh, Jammu & Kashmir, Punjab, Rajasthan, Uttar Pradesh, Uttarakhand, and Chandigarh |
| Chennai | Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, Telangana, and Union Territories of Puducherry and Lakshadweep |
| Kolkata | All other states and Union Territories including Bihar, Jharkhand, Odisha, West Bengal, Northeast states |
Applications can be filed online through the IP India e-filing portal at ipindiaonline.gov.in or physically at the appropriate office.
Step 4 — Prepare and File the Application (Forms and Fees)
Required Forms
Form 1 — Application for Grant of Patent. This is the primary application form containing applicant details, inventor details, title of the invention, and the type of application (provisional or complete).
Form 2 — The Provisional or Complete Specification. This is the technical document — the actual disclosure of your invention. It is filed separately from Form 1 but submitted together.
Form 3 — Statement and Undertaking regarding foreign applications. If you have filed or intend to file a corresponding patent application in any other country, you must disclose this and undertake to keep the Indian Patent Office informed. Must be filed within six months of the Indian application date.
Form 5 — Declaration as to Inventorship. Filed with every complete specification to identify the true and first inventors.
Form 26 — Power of Authority. Required if the application is filed through a registered patent agent. Authorises the agent to act on behalf of the applicant.
Government Fees (e-filing, 2026)
| Applicant Type | Provisional Application | Complete Application |
|---|---|---|
| Natural person / startup / small entity | ₹1,600 | ₹1,600 |
| Others (companies, large entities) | ₹4,000 | ₹4,000 |
Additional fees apply for excess claims (beyond 10 claims), excess pages of specification (beyond 30 pages), and for each additional sheet of drawings.
Important: Startups recognised by DPIIT may be eligible for fee concessions under the SIPP (Startup Intellectual Property Protection) scheme, under which the Central Government bears the professional fees of an empanelled IP facilitator. The startup pays only the government fees.
Step 5 — Publication of the Application
After filing, the patent application is automatically published in the Official Patent Journal 18 months from the filing date or priority date — whichever is earlier.
If you need the application published earlier — for example, to use it as evidence of priority in a commercial transaction or licensing negotiation — you can file a Request for Early Publication using Form 9 along with the prescribed fee. Early publication typically occurs within one month of the request.
After publication, the invention is in the public domain. Third parties can view your application. They cannot oppose it at this stage — opposition happens later if granted.
Step 6 — File a Request for Examination (Form 18)
Publication alone does not trigger examination. You must separately request examination by filing Form 18 — Request for Examination.
Deadline for filing Form 18:
For applications filed on or after 15 March 2024 (under the amended Patents Rules), the Request for Examination must be filed within 31 months from the filing date or priority date.
For applications filed before 15 March 2024, the deadline was 48 months.
If Form 18 is not filed within the deadline, the application is deemed abandoned. This is one of the most common reasons patent applications lapse in India — the applicant files the application, publishes it, and then misses the examination request deadline.
For urgent matters, an Expedited Examination request can be filed using Form 18A — available to startups, small entities, and applicants where India is the international searching or preliminary examining authority for PCT applications. Expedited examination significantly reduces the wait time before an examination report is issued.
Step 7 — Examination and First Examination Report (FER)
Once the Request for Examination is filed, a patent examiner at the Indian Patent Office reviews the application. The examiner assesses:
- Whether the invention meets the patentability criteria — novelty, inventive step, industrial applicability
- Whether the specification discloses the invention fully and clearly
- Whether the claims are clear, supported by the specification, and fairly based on the disclosure
- Whether any Section 3 or Section 4 exclusions apply
- Whether unity of invention is satisfied — all claims must relate to a single inventive concept
The examiner then issues a First Examination Report (FER) — a formal document setting out any objections to the application.
The FER is the patent equivalent of a trademark examination report. It must be responded to within the prescribed time with legal arguments, amendments to claims, and any supporting evidence.
Response deadline: Under the Patents Rules, 2003 (as amended), the applicant has 12 months from the date of the FER to put the application in order for grant. All objections must be overcome within this period.
Step 8 — Response to the First Examination Report
Responding to the FER requires:
- Addressing every objection raised — novelty, inventive step, clarity of claims, sufficiency of disclosure, or Section 3 exclusions
- Amending claims where necessary — narrowing or restructuring claims to overcome prior art objections while preserving meaningful scope of protection
- Providing arguments supported by case law, technical literature, or expert evidence where applicable
- Filing amended drawings or descriptions if required
A hearing may be requested if the examiner is not satisfied with the written response. At the hearing, oral arguments are presented before the Controller.
Step 9 — Grant of Patent
If all objections are overcome, the Controller orders the grant of the patent. The patent is then published in the Patent Journal.
A Patent Grant Certificate is issued within seven days of the grant order.
From the grant date, the patent owner has the exclusive right to make, use, sell, import, or license the invention in India for the remaining term of the patent.
Patent Term
A patent in India is valid for 20 years from the date of filing the application — not from the date of grant. Annual renewal fees must be paid from the end of the second year to keep the patent in force.
If renewal fees are not paid, the patent lapses and the invention enters the public domain.
Step 10 — Renewal Fees
A granted patent must be maintained by paying annual renewal fees (called “maintenance fees” in some jurisdictions). In India, renewal fees are payable at the expiration of the second year from the date of the patent and each subsequent year.
Renewal fee schedules are available on the IP India website. The fees increase progressively over the 20-year patent term.
If renewal fees are not paid on time, there is a six-month grace period during which the patent can be restored on payment of the arrears plus a surcharge. After the grace period, the patent lapses permanently.
How Long Does It Take?
The Indian Patent Office has significantly improved processing times, but filing to grant still typically takes several years:
| Stage | Approximate Timeline |
|---|---|
| Filing to publication | 18 months (automatic) |
| Publication to examination (if Form 18 filed promptly) | 6 months to 2 years depending on technology area |
| FER issued to grant | 1 to 3 years depending on complexity of objections |
| Total: filing to grant | 3 to 6 years in most cases |
Expedited examination under Form 18A can compress this timeline significantly for eligible applicants.
Do You Need a Patent Agent?
Technically no — an inventor can file and prosecute a patent application in India themselves. But practically, for anyone who wants meaningful, enforceable patent protection, professional assistance is not optional — it is essential.
The reason is the specification and claims. A poorly drafted specification that fails to disclose the invention fully and clearly cannot be corrected after filing in many cases. A set of claims that are too narrow protects nothing — a competitor can simply design around them. Claims that are too broad will be rejected or invalidated. Drafting claims that are precisely scoped to cover the commercial embodiment of the invention while surviving examination is a specialist skill.
Professional fees for drafting and filing a complete patent specification in India range from approximately ₹25,000 to over ₹1,00,000 depending on the complexity of the invention. This is an investment — not a cost. A patent that is not properly drafted is not worth the paper it is written on.
Frequently Asked Questions
Q: What is the difference between a provisional and complete patent application in India?
A: A provisional patent application under Section 9 of the Patents Act, 1970 secures a priority date before the invention is fully developed. It does not contain formal claims and cannot itself result in a granted patent. A complete specification containing claims must be filed within 12 months of the provisional or the application is abandoned. A complete application filed directly contains the full specification and claims and is the application that proceeds through examination to grant.
Q: How much does it cost to file a patent in India?
A: Government fees for e-filing are ₹1,600 per application for natural persons, startups, and small entities, and ₹4,000 for companies and other large entities. These are base fees — additional charges apply for excess claims and pages. Professional fees for drafting and filing the complete specification typically range from ₹25,000 to over ₹1,00,000 depending on complexity. Startups registered with DPIIT may be eligible for the SIPP scheme under which the government covers professional fees.
Q: How long does a patent last in India?
A: A patent in India is valid for 20 years from the date of filing the application, not from the date of grant, under Section 53 of the Patents Act, 1970. Annual renewal fees must be paid from the end of the second year. If renewal fees lapse, the patent can be restored within six months on payment of arrears and a surcharge — after which it lapses permanently.
Q: Can software be patented in India?
A: Pure software — computer programs as such — is excluded from patentability under Section 3(k) of the Patents Act, 1970. However, a software-implemented invention that produces a specific technical effect, particularly when integrated with hardware, may qualify. This is a nuanced area and requires advice from a specialist patent attorney before filing.
Q: What happens if I publicly disclose my invention before filing?
A: Public disclosure before filing destroys novelty and generally prevents patentability, since the invention is no longer new. India does not have a grace period for inventor disclosure in most cases. The exception is that disclosure at a recognised international exhibition under Section 31 of the Patents Act or during a learned society paper with prior notification to the Controller may not destroy novelty — but these are narrow exceptions. The safest approach is always to file before any public disclosure.
Q: What is Form 18 and why is it critical?
A: Form 18 is the Request for Examination under the Patents Act, 1970. After a patent application is filed and published, examination does not begin automatically — the applicant must file Form 18 to request it. For applications filed on or after 15 March 2024, Form 18 must be filed within 31 months of the filing or priority date. Missing this deadline results in the application being deemed abandoned — one of the most common reasons patent applications lapse in India.
Q: What is the PCT route for patent filing in India?
A: The Patent Cooperation Treaty (PCT) is an international treaty administered by WIPO that allows an inventor to file a single international patent application covering multiple countries simultaneously. An Indian patent application can be the basis for a PCT application designating other countries. Conversely, a PCT application designating India enters the national phase before the Indian Patent Office within 31 months of the priority date. The PCT route is advisable for inventors seeking protection in multiple countries simultaneously.
A Note from Practice
Filing a patent is the beginning of a process, not the end of one. The priority date you secure on filing day is your most valuable asset — everything else can be developed, amended, and argued over the years that follow.
The most common mistake is waiting too long to file. Inventors polish their invention for months, show it to potential investors under vague verbal confidentiality, present at a conference, or post about it online — and only then think about the patent. By that time, the novelty may already be compromised.
File the provisional application first. Secure the date. Then develop the complete specification properly with professional help.
If you are unsure whether your invention is patentable, or whether you need a patent, trademark, or copyright — or all three — start with a consultation.
Book a Free Consultation → Consultation – TMZON
For a primer on how patents compare to trademarks and copyright for your specific business:
Patent vs Trademark vs Copyright in India — Which Do You Need? → Patent vs Trademark vs Copyright
This article is written for general informational purposes and does not constitute legal advice. For advice specific to your patent application, please consult a qualified patent attorney or registered patent agent.
Written by Arya Sharma, Advocate, Bombay High Court | Trademark Attorney
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