Patent Strategy in India: What to File, When, and Where

Initially Published in 2016; Updated in August 2026

A patent strategy in India is a sequence of dated decisions, not a set of intentions. Almost every one of those dates is fixed by a provision of the Patents Act, 1970 or the Patents Rules, 2003. Some are hard cut-offs and some carry a narrow extension or condonation route, but the cheap ones are the dates you meet.

The dates below are Indian, with one flagged exception. They come from the Act as amended to 1 August 2024 and from the Patents Rules as they stand after the Patents (Amendment) Rules, 2024, which came into force on 15 March 2024 and moved four of them.

Quick answer: If you are resident in India, file here at least six weeks before you file abroad, or get the Controller’s written permit. File the complete specification within twelve months of a provisional. Request examination within thirty-one months. Put the application in order for grant within six months of the first examination report. Then review the portfolio at each renewal step-up.

What a patent strategy has to decide in India

Seven dates govern an Indian patent from filing to expiry, and one decision comes before all of them: whether to file at all. Each of the seven sits in a provision, and the relief available once one has passed is narrow. The timetable is the strategy.

That prior decision has no deadline attached and is the one skipped most often. Some inventions are better held as trade secrets or published defensively, and some subject matter is excluded from patentability altogether. For software and AI teams it decides everything downstream: a claim caught by the computer-programme exclusion does not reach the timetable.

Our guides on choosing between a patent, a trade secret and defensive publication, on what cannot be patented in India and on software patents and Section 3(k) cover that gate. Everything below assumes it has been passed.

A patent filing strategy is only as good as the diary behind it. Scope can be argued and claims can be amended; a date that has passed leaves you asking for a discretionary extension instead.

Provisional or complete: what the twelve-month window buys

A provisional specification buys twelve months, and nothing more. File one and the complete specification has to follow within twelve months of the application date, or the application is deemed abandoned. The clock starts on the day you file.

What the window does not buy is scope. A claim in the complete specification takes the earlier priority date, the date from which novelty is judged, only where it is “fairly based on the matter disclosed” in the provisional (Section 11(2)). Matter published in the meantime that the provisional did not describe becomes citable against that claim. Use in India, or publication anywhere, of matter the provisional did describe does not, by reason only of that use or publication, prevent grant or invalidate the patent.

So the question of when to file a patent in India is really a question about how settled the technical disclosure is. A provisional describing a working prototype and every candidate mechanism can support the earlier date for whichever one gets built; one describing only the goal puts that date at risk.

The same test applies to a software team, and bites harder: a provisional that describes an outcome rather than the technical means of achieving it gives away the priority date and the technical-effect argument in one move.

Filing is cheap relative to what follows. The application fee is Rs 1,600 for e-filing by a natural person, startup, small entity or educational institution, and Rs 8,000 for other applicants, with Rs 160 or Rs 800 for each sheet of specification beyond thirty and Rs 320 or Rs 1,600 for each claim beyond ten. Our guides on when a provisional specification is the right filing and on the right stage at which to file go into the drafting consequences.

Filing abroad: the six-week rule in Section 39

A person resident in India may not make, or cause to be made, any application for a patent outside India unless an application for the same invention was filed in India at least six weeks earlier and no secrecy direction is in force, or unless the Controller has granted a written permit.

Those three words, “cause to be made”, are what catch a founder with an overseas accelerator or a US-incorporated parent. Instructing foreign counsel to file is enough. Both conditions are cumulative, so waiting six weeks without an Indian filing achieves nothing.

The permit route runs on Form 25, and the Controller disposes of the request within twenty-one days, counted from receipt of Central Government consent where the invention relates to defence or atomic energy. The fee matches the filing fee: Rs 1,600 or Rs 8,000 for e-filing, by applicant category.

Taking the consequences for the application and the patent alone, the Indian application is deemed to have been abandoned and any patent granted on it is liable to be revoked, and non-compliance is a stated ground of revocation, so the exposure does not close at grant. Chapter XX deals separately with penalties and is outside the scope of this article.

One carve-out is widely misread. The section does not apply at all in relation to an invention for which protection was first sought outside India by a person resident outside India; what that means for an India-resident co-applicant is not settled by the words of the sub-section. A non-resident co-founder is outside the section in any event, because it binds only a person resident in India.

Residence, not nationality, is the test, and the Act does not define it, so our guide to the foreign filing licence and when you need one works through the practical indicators.

Choosing jurisdictions: the Convention route or the PCT

Every patent has effect throughout India, and the rights it confers are rights to prevent acts done in India. There is no world patent, so the question is which route defers the country decision, and at what price.

Two routes lead out of an Indian first filing, and Indian law fixes only one end of each. On the Paris route, a convention application must be filed in each destination country within twelve months of the Indian filing, on that country’s own law.

On the PCT route, an international application defers the national decision at each designated office to that office’s own time limit. Thirty months is the treaty baseline and the ordinary case, and India fixes thirty-one. A small number of offices still run shorter periods, so the target office decides, not the treaty.

The trade-off is easy to miss. Term for a patent granted on a PCT international application designating India runs twenty years from the international filing date, not from national phase entry (Section 53(1), Explanation). Delaying entry does not postpone expiry: the twenty years runs whether or not you have picked your countries.

Deferral is worth paying for when the market picture is genuinely unsettled. It is worth skipping when the target countries are already known, because direct filings can start national prosecution earlier and avoid the international phase fees. Our comparison of direct filing against the PCT sets out the cash profile of each.

Examination timing after the shift to thirty-one months

Nothing is examined until examination is requested, and the window shrank in 2024. A request for examination has to be filed on Form 18 within thirty-one months from the date of priority or the date of filing, whichever is earlier, replacing forty-eight months.

The carve-out matters as much as the change. For an application filed before the 2024 Rules commenced on 15 March 2024, the period is the one that applied before that date, so a 2023 filing still runs on forty-eight months.

Miss the applicable period and the application is treated as withdrawn by the applicant. Restoration does not reach it, because restoration is for lapsed patents. What remains is a discretionary condonation of delay of up to six months, priced accordingly.

Publication runs on its own clock at eighteen months from filing or priority, whichever is earlier. It can be pulled forward on Form 9 for Rs 2,500 or Rs 12,500 by applicant category.

From publication the applicant has the like privileges and rights as if the patent had been granted, although no infringement proceedings can be instituted until grant, and no suit lies for infringement committed before publication. Publishing early therefore starts the recoverable period earlier.

It also starts the pre-grant opposition window, and no patent can be granted for six months after publication.

Examination itself can be accelerated. A request for expedited examination is filed on Form 18A, by electronic transmission only and within the period prescribed for an ordinary request, on any of ten grounds, of which being a startup and being a small entity are two.

One precondition is easy to miss. Unless the application is already published or a publication request is already on file, the expedited request has to be accompanied by one, so the Rs 2,500 or Rs 12,500 above is part of the price.

The fee is Rs 8,000 for the concession category against Rs 60,000 for other applicants. Acceleration pulls the report forward, and with it the reply clock and the spend. Our guides to the request for examination and its deadlines and to expedited examination cover eligibility in detail.

What the response window and Section 8 actually cost

Once the first statement of objections issues, which is the examiner’s list of objections, the application has to be put in order for grant within six months. That period can be extended by a further three months on Form 4.

Until the 2024 Rules that request had to be made before the six months expired. The amendment replaced the cross-reference, so the rule now requires it before expiry of the period “specified herein”; practitioner commentary reads that as allowing a later request, but the safe course is to file inside the six months. Nine months remains the ceiling, and an application not put in order in time is deemed abandoned.

Running alongside is the obligation missed most often. An applicant prosecuting a corresponding application outside India files a statement and undertaking on Form 3 within six months of filing in India.

The applicant then keeps the Controller informed of those foreign filings within three months of the first statement of objections.

That obligation used to recur with every foreign filing. Since 15 March 2024 it is one three-month window running from the examination report, which is a relaxation rather than a tightening.

The statutory duty itself has not shrunk. Section 8(1)(b) requires an undertaking to keep the Controller informed in writing, from time to time, up to the date of grant of the patent in India.

The Controller may also direct a fresh statement within two months, and a delay in filing can be condoned for up to three months. Neither is a reason to treat the post-report filing as the end of the obligation.

Section 8 failures are not administrative. Failure to disclose the information it requires is a stated ground on which a granted patent may be revoked, and it is available as a ground of opposition both before and after grant. Here is what the sequence costs in official fees, for e-filing.

Figures from the First Schedule, Table I, as substituted by the Patents (Amendment) Rules, 2024, and verified as of August 2026 against the Patent Office’s forms and official fees page. A further ten per cent is payable on physical filing where physical filing is allowed, and a small entity, startup or educational institution files Form 28 with every fee-bearing document.

Taken in time, the extension on an examination report costs a tenth of what the general provision costs the concession category, and 8 per cent of what it costs everyone else. A patent strategy for startups turns on cash timing more than scope: the concession category pays a fifth at most fee-bearing steps, so which entity files has to be settled before the first application goes in.

The choice is stickier than it looks. Transfer the application to an entity outside the concession category, an offshore parent for instance, and the difference in fees for all previous proceedings falls due with the request for transfer; simply outgrowing startup or small entity status does not trigger that payment. Our breakdown of what a patent costs in India and our guide to the Form 3 statement and undertaking go further on both.

Renewals: deciding what to keep

Renewal is where a portfolio gets pruned, and the fee schedule tells you when to look. Fees start with the third year and are payable at the expiration of the second year from the date of the patent, which is the filing date and not the grant date.

The schedule steps up three times, at the seventh, eleventh and sixteenth years, and those step-ups are the natural review points.

That anchor catches people out. Patents are rarely granted within two years of filing, so several years of renewal fees have usually accrued by grant; where the patent is granted more than two years after filing, the years that fell due in the meantime may be paid within three months of the patent being recorded in the register, or up to nine months on the prescribed extension (Section 142(4)). Budget for a lump sum at grant, not for a fresh two-year runway.

For e-filing by a natural person, startup, small entity or educational institution, the annual fee is Rs 800 through the sixth year, Rs 2,400 from the seventh to the tenth, Rs 4,800 from the eleventh to the fifteenth, and Rs 8,000 from the sixteenth to the twentieth. For other applicants each figure is five times higher.

Letting one go is a decision, not an accident. If the fee is not paid within the prescribed period the patent ceases to have effect, and on cessation the subject matter is entitled to no protection.

The renewal period can itself be extended by up to six months on Form 4, which covers an ordinary administrative slip.

Restoration is narrow. A ceased patent can be restored on an application by the patentee or a legal representative, made within eighteen months of cessation and supported by a verified statement of the circumstances. It is granted only if the Controller is prima facie satisfied that the failure to pay was unintentional and that there has been no undue delay, so a lapse that was a deliberate decision cannot be undone.

One 2024 addition belongs in the budget. Where renewal fees are paid in advance through electronic mode for a period of at least four years, a ten per cent reduction applies. For a patent committed to term, paying forward is cheaper. Our guide to patent renewal in India sets out the mechanics.

Where the sequence usually breaks

Three failures account for most of the damage in an Indian patent timeline, and each is a date rather than a judgement call. Two are covered above; the third catches people before they have filed anything.

Disclosing before filing is the first. An invention published anywhere before the priority date of the relevant claim is not new, and that is a ground of pre-grant opposition, post-grant opposition and revocation.

The savings in the Act are narrower than they sound. The exhibition limbs need the exhibition to have been notified in the Official Gazette; the learned-society limb does not, but it reaches only a paper read by the true and first inventor before such a society or published in its transactions, and the application must follow within twelve months.

Since March 2024 the benefit is claimed on Form 31. An ordinary demo day is not covered merely because it is a demo day: the exhibition limb reaches only an exhibition notified for these purposes. A live product page or a launch post sits outside them.

Applying abroad inside the six-week window is the second, and treating a provisional as a placeholder is the third. Both are cheap to avoid and expensive to fix.

The action worth taking this quarter is the smallest one. Pull the filing date and priority date of every pending application onto one sheet, and mark which were filed on or after 15 March 2024 and so run on thirty-one months for examination rather than forty-eight. It finds the deadlines that have moved. Our patent deadline tracker sets out the statutory periods and their extension routes in one searchable table if you want the full set beside you.

The provisions behind this guide

Every date, fee and consequence above comes from the Patents Act, 1970 or the Patents Rules, 2003 as amended in 2024. The pinpoints are collected here rather than scattered through the text, so you can look one up without having to read around it.

Two sources sit outside the Act and the Rules: the PCT, Article 22, for national phase time limits, and the Paris Convention, Article 4C(1), for the twelve-month priority period. Every fee figure comes from the First Schedule, Table I, as substituted by G.S.R. 211(E) of 15 March 2024.

Frequently Asked Questions

Do I need a patent before I pitch to investors?

Not necessarily, but you should have filed before you disclose. An invention published before the priority date of the claim is not new, and a pitch without a confidentiality agreement can amount to publication. A provisional specification filed first preserves the date at low cost, which is why it should precede the fundraise.

Can I file in the United States first if I am based in India?

Only after an Indian application for the same invention has been on file for at least six weeks, or after obtaining a written permit. The section catches you for causing an application to be made, so instructing US counsel counts. Filing abroad first without either leaves the Indian application deemed abandoned.

What happens if I miss the thirty-one month examination deadline?

The application is treated as withdrawn by the applicant. Restoration is for lapsed patents and does not reach it. What remains is a discretionary condonation of up to six months, at Rs 10,000 or Rs 50,000 a month. Applications filed before 15 March 2024 still run on the earlier forty-eight month period.

Is a provisional specification enough to say “patent pending”?

An application is on file, so the description is accurate. What a provisional does not give you is an enforceable right or guaranteed priority for every claim you later draft, because priority attaches only to claims fairly based on what the provisional actually disclosed (Section 11(2)). Enforcement waits for grant.

What does the government charge a startup to file a patent in India?

Rs 1,600 for e-filing the application, Rs 4,000 for the request for examination and Rs 8,000 if you want expedited examination, plus excess sheet and claim fees. Reimbursement and facilitator schemes are separate: see our guide to patent reimbursement schemes for startups.

Should I use the PCT or file directly in each country?

Thirty months is the treaty baseline and India allows thirty-one, but Luxembourg and Tanzania still run shorter periods under Chapter I, so check each target office. Deferral is worth paying for when the markets are unsettled; if you already know the countries that matter, direct filings are often cheaper.

Can I get my Indian patent examined faster?

Yes, on Form 18A, where the applicant is a startup or a small entity or falls within one of the other listed grounds, filed electronically and within the ordinary examination window. Expect the report sooner, which also brings forward the reply window and the associated cost.

Does my Indian patent protect me in other countries?

No. A patent has effect throughout India, and the rights it gives are rights to stop acts done in India. Protection anywhere else needs a separate application in that country, filed either on the Paris route within twelve months of your Indian filing or through the PCT.

When can I stop paying to keep a patent alive?

Whenever the patent stops earning its fee, subject to one consequence: on cessation the subject matter is entitled to no protection. Restoration within eighteen months requires the failure to pay to have been unintentional, so a deliberate lapse is final. The fee steps up at the seventh, eleventh and sixteenth years.

This article explains the law on patent filing strategy and sequencing in India as at August 2026 and is for general information only. It is not legal advice. Government fees, forms, and procedures change; confirm current figures with the Indian Patent Office before you file. For advice on your specific invention, consult a registered patent agent.