Filing a patent in India is a sequence of legal steps with fixed deadlines. Most avoidable losses happen before the first form is filed, when an invention is disclosed too early or described too thinly.
This guide follows an Indian patent application from the first invention discussion to grant and the years after grant. It reflects the Patents Act, 1970 and the Patents Rules, 2003 as amended by the Patents (Amendment) Rules, 2024, which took effect on 15 March 2024. Forms and official fees change from time to time, so each step should be checked against the current IP India material at the time of filing.
Before filing. Is the invention patentable?
An invention must be new, involve an inventive step and be capable of industrial application. These requirements come from section 2(1)(j) of the Act. Section 3 then lists subject matter that is not an invention at all. It includes a mathematical or business method, a computer programme per se and an algorithm under section 3(k), a mere new form of a known substance without enhanced efficacy under section 3(d), and methods of medical treatment under section 3(i).
Software and AI inventions are not excluded as a class. The question is whether the claims define a technical solution to a technical problem rather than a program or method in the abstract. The way the specification explains the technical effect often decides the outcome.
Keep the invention confidential until an application is on file. Section 31 gives only a narrow grace period for specified disclosures, such as display at an exhibition notified by the Government or a paper read before a learned society. A product launch, investor pitch or conference talk outside those categories can destroy novelty in India and in many other countries.
Step 1. Search the prior art
A patentability search tests the invention against earlier patents and publications before money is spent on drafting. It also shows which features are genuinely new, which helps the drafter place the claims correctly. A search cannot find unpublished applications, so it reduces risk rather than removing it.
Step 2. Choose the filing route
The route depends on how ready the invention is and where protection is needed.
- Provisional application. A provisional specification secures a filing date for an invention that is still developing. The complete specification must follow within 12 months under section 9(1). If it does not, the application is treated as abandoned.
- Complete application. A complete specification with claims can be filed directly when the invention is fully worked out.
- Convention application. An applicant who first filed in a convention country can file in India within 12 months of that first filing and claim its priority under section 135.
- PCT route. An international application under the Patent Cooperation Treaty keeps options open in many countries. Entry into the Indian national phase is due within 31 months from the priority date.
Step 3. Draft the specification
The specification is filed in Form 2. A complete specification must describe the invention fully, disclose the best method of performing it known to the applicant and end with claims that define the scope of protection. These requirements appear in section 10. The claims must be clear and must be fairly based on what the description discloses.
Good drafting anticipates examination. The description should support fallback positions, explain the technical advantage and use consistent terminology across the claims, description and drawings. It is very hard to add support later. Amendments under section 59 cannot introduce matter that was not in the application as filed.
Step 4. File the application
Applications are filed online through the IP India portal at the appropriate patent office. The office is chosen by the applicant's residence or place of business, or by the place where the invention originated. Applicants with no place of business in India use their address for service in India. The Chennai office covers Karnataka, Kerala, Tamil Nadu, Andhra Pradesh, Telangana, Puducherry and Lakshadweep. Delhi and Mumbai cover the northern and western states, and Kolkata covers the rest.
- Form 1, the application itself, with applicant and inventor details.
- Form 2, the provisional or complete specification with drawings and abstract.
- Form 3, the statement and undertaking about corresponding foreign applications under section 8.
- Form 5, the declaration as to inventorship, filed with the complete specification or within the permitted time after it.
- Form 26, the power of attorney, where a patent agent files on the applicant's behalf.
- Proof of right to apply, where the applicant is not the inventor, such as an assignment.
- A certified copy of the priority document for a convention application, where required.
Official fees depend on the applicant. Natural persons, startups, small entities and educational institutions pay reduced fees. Other applicants pay the standard rate. The current schedule is published by IP India.
Foreign filing permission for inventions made in India
Section 39 restricts residents of India from applying for a patent outside India without written permission from the Patent Office. Permission is not needed where an application for the same invention was filed in India at least six weeks before the foreign filing and no secrecy direction was issued. Permission can be requested in Form 25. Breaching section 39 can lead to the Indian application being treated as abandoned and to penalties, so the first foreign filing should never be made without checking this point.
Step 5. Publication
An application is ordinarily published in the Patent Office Journal after 18 months from the filing date or the priority date, whichever is earlier. An applicant can request early publication in Form 9. The application is then usually published within one month of the request.
From the date of publication, the applicant has the same privileges and rights as if a patent had been granted on that date. Proceedings for infringement can only begin after grant. This is the effect of section 11A(7), and it is one reason applicants choose early publication.
Step 6. Request examination
An application is not examined unless the applicant files a request for examination in Form 18. For applications filed on or after 15 March 2024, the request is due within 31 months from the priority date or the filing date, whichever is earlier. The earlier limit was 48 months. An application without a timely request is treated as withdrawn under section 11B.
Expedited examination is available through Form 18A for eligible applicants. The categories include startups, small entities, applicants who chose India as the International Searching Authority or International Preliminary Examining Authority, certain government entities, and applications where at least one natural person applicant is female. Expedited examination moves quickly and leaves little time to prepare responses, so the claims should be ready before it is requested.
Step 7. Respond to the First Examination Report
The examiner's objections are sent to the applicant in the First Examination Report, usually called the FER. The applicant has six months from the date of the FER to put the application in order for grant. That period can be extended by up to three months on a request in Form 4. If the application is not put in order in time, it is deemed abandoned under section 21.
The 2024 amendments also require an updated Form 3 within three months of the FER, covering foreign applications filed after the Indian application. A careful response addresses every objection, explains the technical distinctions from the cited art and proposes amendments that have clear support in the specification.
Step 8. Hearing
If objections remain after the written response, the Controller will generally offer a hearing under section 14 before refusing the application. Hearings can be attended by video conference. Written submissions must usually be filed within fifteen days after the hearing. The Controller then decides whether to grant or refuse the application.
Step 9. Pre grant opposition
Any person may file a representation opposing the grant under section 25(1) after publication and before grant. The grounds include lack of novelty, obviousness, non patentable subject matter and failure to disclose foreign application details. The Rules also bar grant before six months from publication, which gives third parties time to oppose.
Step 10. Grant and life after grant
Once the Controller is satisfied, the patent is granted and the grant is published in the Journal. The term is 20 years from the date of filing of the application under section 53. For a PCT national phase application, that date is the international filing date.
- Post grant opposition. An interested person may oppose within one year from the date of publication of the grant under section 25(2).
- Renewal fees. Annual renewal fees keep the patent in force. Arrears that fall due before grant must be paid within the time the Rules allow after grant. Paying at least four years in advance electronically attracts a ten per cent reduction.
- Statement of working. The patentee must file Form 27 once for every period of three financial years, starting with the financial year after grant. It is due within six months after the end of each period.
- Records. Assignments must be in writing under section 68. They and licences should be registered with the Patent Office under section 69, because an unregistered document may not be admitted as evidence of title.
How long does it take?
There is no fixed timetable. Publication follows at 18 months unless it is brought forward. Examination starts only after a request and depends on the backlog in the relevant technology group. Expedited examination can produce a decision far faster than the regular route. The single most controllable factor is the quality of the specification and the response, because every avoidable objection adds a round of correspondence.
Frequently asked questions
Can I file a patent application in India myself?
Yes. An applicant can file and prosecute an application in its own name. Only a registered patent agent may practise as an agent before the Patent Office, although advocates may appear at hearings. Most applicants use an agent because drafting and prosecution decisions affect the value of the patent for its whole life.
Is a provisional application worth filing?
It is useful when the invention needs a date before it is complete or before a disclosure that cannot be delayed. It is not a shortcut. Features that are not described in the provisional specification do not receive its date.
Does an Indian patent protect the invention in other countries?
No. Patents are territorial. Protection abroad needs separate filings, usually through the Paris Convention within 12 months or through the PCT. Check section 39 first if the invention was made in India.
What is the difference between patent filing and patent registration?
People often use the words interchangeably. Filing starts the process. A patent is granted only after examination, and the Patent Office then records it in the register of patents.