Filing a patent in India is more accessible than most inventors realise, but it is also more unforgiving of mistakes. A single error in the specification, a missed deadline or a public disclosure before filing can permanently destroy your ability to patent an otherwise groundbreaking invention. This guide walks you through every step of the Indian patent filing process, from assessing patentability to receiving your grant.
Before You File — Key Checks
Before spending time and money on a patent application, confirm that your invention meets the three basic requirements of the Patents Act, 1970:
- Novelty: The invention must be new — not disclosed anywhere in the world in any form (published papers, presentations, products, websites) before your filing date
- Inventive step: The invention must not be obvious to a person skilled in the relevant field — it must involve a creative leap beyond what was already known
- Industrial applicability: The invention must be capable of being made or used in some industry
Also confirm that your invention does not fall within the non-patentable categories under Section 3 of the Patents Act. See our detailed guide: What Cannot Be Patented in India →
⚠️ Critical rule: Do NOT publicly disclose your invention before filing. Any public disclosure — a conference presentation, a product launch, a social media post, a published paper — before your filing date destroys novelty and makes the invention permanently unpatentable in India. File first, disclose later.
Step 1 — Conduct a Prior Art Search
A prior art search identifies existing patents, published applications and technical literature that may affect the novelty or inventive step of your invention. Search the following databases:
- IP India Patent Search — all Indian patent applications and grants
- USPTO (United States Patent and Trademark Office) — global patent database
- EPO Espacenet — European Patent Office global patent database
- Google Patents — searchable across 100+ patent offices
A thorough prior art search before filing helps you understand the landscape, draft claims that are differentiated from existing art and assess whether your invention is worth the cost of filing.
Step 2 — Provisional vs Complete Specification
India gives you two options for your initial patent filing:
- Provisional Application: A simplified filing that establishes your priority date (your place in the queue) without requiring fully drafted claims. It buys you 12 months to complete and file the full specification. This is ideal when your invention is still being developed or when you want to secure a date quickly. Cost: ₹1,600 for individuals/startups; ₹8,000 for large entities.
- Complete Application: The full patent application with complete specification and claims, filed directly without a provisional. If you file directly with a complete specification, your 20-year term runs from this date. Cost: ₹1,600 (individual) to ₹8,000 (large entity) for the application fee.
If you file a provisional, you must file the complete specification within 12 months. Failure to do so results in the application being treated as abandoned — you lose your priority date entirely.
Step 3 — Draft the Complete Specification
The complete specification is the most technically and legally demanding document in the patent process. It must contain:
- Title: A clear, concise title that describes the invention
- Field of invention: The technical field to which the invention relates
- Background: The prior art and the problem the invention solves
- Summary of invention: A brief statement of the invention and its objects
- Brief description of drawings: If the application includes drawings (strongly recommended for mechanical and electronic inventions)
- Detailed description: A complete, enabling description of the invention — clear enough that a person skilled in the field could replicate it
- Claims: The legally binding definition of what you are claiming as your invention — the most critical part of any patent. Claims must be clear, concise and fully supported by the description.
- Abstract: A 150-word summary for publication
💡 Why professional help matters most here: The quality of your claims determines the commercial value of your patent. Poorly drafted claims can be easily designed around, giving competitors a free pass to use your invention with minor modifications. A patent attorney who understands both the technology and patent law drafts claims that maximise protection.
Step 4 — File the Application
Patent applications in India are filed with the Indian Patent Office using Form 1 (Application for Grant of Patent) accompanied by the specification (Form 2), statement and undertaking (Form 3) regarding corresponding foreign applications, and a declaration of inventorship (Form 5). Filing can be done online through the IP India portal or physically at one of the four Patent Offices in Chennai, Delhi, Mumbai or Kolkata.
Step 5 — Publication
After filing, every patent application is mandatorily published in the Official Patent Journal 18 months from the priority date (filing date of provisional or complete, whichever is earlier). You can request early publication by filing Form 9 (no fee for individuals/startups) — this can be important if you need the publication as proof of filing for commercialisation discussions.
Step 6 — Request for Examination
Publication alone does not trigger examination. You must separately file a Request for Examination (Form 18) within 31 months from the priority date. The Patent Office then assigns an Examiner who conducts a substantive examination of the application. An Expedited Examination option (Form 18A) is available for certain categories including startups, small entities and applicants whose inventions relate to specific technology areas.
The Examiner issues a First Examination Report (FER) citing any objections on novelty, inventive step, clarity of claims or other grounds. You have 12 months from the FER date to respond.
Step 7 — Grant
If all objections are resolved satisfactorily, the patent is granted and published in the Patent Journal. The grant gives you a 20-year exclusive right from the filing date of the complete specification, subject to payment of annual renewal fees.
Fee Summary
| Stage | Individual / Startup | Large Entity |
|---|---|---|
| Provisional application | ₹1,600 | ₹8,000 |
| Complete specification | ₹1,600 | ₹8,000 |
| Request for examination | ₹4,000 | ₹20,000 |
| Expedited examination | ₹8,000 | ₹60,000 |
| Annual renewal (years 3–20) | ₹800–₹4,800 | ₹4,000–₹24,000 |
Conclusion
Filing a patent in India is a multi-stage process that rewards preparation, precision and speed. The most important rules are: search first, file before you disclose, draft your claims carefully and respond to examination reports within deadlines. For most inventors, professional guidance on at least the specification and claims drafting is a worthwhile investment that determines the commercial value of the patent. Learn about our patent filing service → or read more on the IP Law Blog.
Have an invention you want to patent?
Adv. Nikhil Soni advises on patentability, conducts prior art searches and manages the entire patent filing process.