Patent registration in India — secure the invention before someone else files it
Prior-art search, drafting of the specification, filing before the Patent Office, prosecution through examination, and defence against opposition — handled end to end by Patra’s Law Chambers from Kolkata and New Delhi.
A twenty-year monopoly, counted from the day you file
A patent is a statutory monopoly. For twenty years from the date of filing, section 53 of the Patents Act, 1970 lets the patentee stop everyone else from making, using, selling, offering for sale or importing the invention in India. It is not a reward for having the idea — it is a reward for disclosing it in a specification detailed enough that a skilled person could work it once the term runs out.
Two consequences follow, and both decide cases. First, India runs a first-to-file system: between two people who invented the same thing independently, the one who reached the Patent Office first wins, however unfair that feels. Second, the monopoly is only as wide as the claims that were drafted — a strong invention wrapped in narrow or careless claims produces a patent a competitor can design around in an afternoon.
Three statutory hurdles, then a list of exclusions
Before any question of forms and fees arises, the invention must clear section 2(1)(j): it must be novel, involve an inventive step, and be capable of industrial application. Clearing all three still is not enough. Section 3 then removes whole categories from patentability regardless of how clever they are, and section 4 removes inventions relating to atomic energy.
The exclusions that catch Indian applicants most often are section 3(d), which refuses a new form of a known substance unless it shows enhanced therapeutic efficacy; section 3(k), which refuses a mathematical or business method and a computer programme per se; section 3(i), which refuses methods of medical treatment; and section 3(p), which refuses traditional knowledge. A software product is not automatically barred by 3(k) — what matters is whether the claim discloses a technical effect beyond the running of the programme itself.
This is an orientation tool, not an opinion on your invention. A real patentability call needs a prior-art search and a reading of the claims as drafted.
Filing early to hold a date, or filing once to finish the job
Section 9 allows an application to begin with a provisional specification — a description of the invention as it stands, without claims — which fixes the priority date. The complete specification must then follow within twelve months, or the application is deemed abandoned. The choice between the two routes is usually the first real decision in the matter.
A description of the invention as far as it has been developed. No claims are required. Cheaper and faster to prepare, and it stops the clock while the invention is still being refined or funding is being raised.
The full disclosure with claims defining the monopoly, an abstract, and drawings where needed. This is the document the Patent Office examines and the document a court will later construe.
Twelve months to file the complete specification under section 9. Miss it and the application is deemed abandoned — and the disclosure may by then have destroyed the novelty of a fresh filing.
No such twelve-month trap. The next deadlines are publication and the request for examination, both of which run from the priority date rather than from any act of yours.
Priority is only secured for what the provisional actually describes. Matter added later in the complete specification gets the later date — which is precisely where a thin provisional loses its value in a dispute.
The invention is locked as filed. Claims can be narrowed during prosecution but not broadened, so a specification drafted too tightly cannot later be stretched to cover what a competitor is doing.
The sequence, and the deadline hiding inside each stage
Most applications are lost not on merits but on dates. Tap any stage below to see what actually has to be done and by when.
Before anything is filed, the invention is searched against Indian and foreign databases to see what already exists. The specification is then drafted around whatever space the prior art leaves — this is the stage that determines the width of the eventual monopoly, and the stage most applicants are tempted to rush or skip.
The application is filed at the patent office having jurisdiction over the applicant, with the specification, the declaration of inventorship, and the statement regarding corresponding foreign applications. The date stamped here is the date the whole case is measured from, and under a first-to-file system it is the only date that matters against a rival.
Forms 1, 2, 3, 5 · Form 26 if filed through an advocateUnder section 11A the application is published in the Official Journal eighteen months from the priority date, and the specification becomes public. Publication also switches on the right to pre-grant opposition, and gives the applicant provisional privileges that can be enforced only once the patent is actually granted. Early publication can be requested if the applicant wants the clock moved forward.
Form 9 for early publicationNothing is examined automatically. A request for examination must be filed within the period prescribed by the Patents Rules, and an application for which no request is filed in time is treated as withdrawn — a complete and irreversible loss of the invention, with no discretion to excuse it. Startups, small entities, female applicants and certain other categories can request expedited examination.
Form 18 · Form 18A for expedited examinationThe Controller issues a First Examination Report raising objections on novelty, inventive step, section 3 exclusions and form. The reply must place the application in order for grant within six months, extendable by three months on request. This is where most of the real lawyering happens: claims are amended, prior art is distinguished, and every concession made here narrows the patent permanently.
Form 4 for the three-month extensionAny person may oppose before grant under section 25(1) once the application has been published. After grant, only a person interested may oppose under section 25(2), and only within twelve months of the date of publication of grant. A rival watching the Journal will often use the pre-grant route precisely because it costs them very little and delays the applicant considerably.
The patent is granted and entered in the Register. Renewal fees fall due from the third year onwards and a lapse for non-payment can only be repaired by an application for restoration made within the prescribed period. A statement of working must also be filed periodically — an obligation that is quietly ignored by a great many patentees until it is raised against them.
Form 27 for the statement of workingWhich form does what
The Patents Rules prescribe a numbered form for almost every step. Tap a card to see what each one is for — and note that the ones people forget, rather than the ones they file, are what generate objections later. The forms themselves are published by the Office of the Controller General of Patents, Designs and Trade Marks at ipindia.gov.in.
The application itself — applicant and inventor particulars, the title, and the declarations that the applicant is entitled to apply. Everything else in the file hangs off this document.
The provisional or complete specification. In its complete form it carries the description, the claims that define the monopoly, the abstract and the drawings.
The statement and undertaking on corresponding applications filed abroad. The duty under section 8 is continuing, and failure to keep it updated is a ground of revocation — not a technicality.
Names the true and first inventors. Required with a complete specification, and the place where disputes between co-founders and employers usually surface for the first time.
Requests publication before the eighteen-month point. Useful where the applicant wants to start the examination sequence sooner, or wants the disclosure on record against a competitor.
Without this the application is never examined and is ultimately treated as withdrawn. Form 18A is its expedited counterpart for startups, small entities and other eligible categories.
Authorises the advocate or patent agent to act in the matter. Filed at the outset so that correspondence from the Controller reaches the person actually conducting the prosecution.
A periodic statement on whether the granted patent is being worked in India. Neglected almost universally, and awkward to explain when a compulsory licence application or an infringement defence puts it in issue.
Claims the reduced fee band. It must be supported by real evidence of status — and if status is lost midway, the difference in fees becomes payable.
Four patent offices, and only one of them is yours
Rule 4 of the Patents Rules allots territorial jurisdiction between the four patent offices by reference to the applicant’s place of residence, domicile or business — or, for a foreign applicant, the address for service in India. Filing in the wrong office is a correctable irregularity, but a needless one. Kolkata is the head office of the Patent Office, which is why so much of the eastern region’s patent work begins here.
Official fees move in bands, not in one figure
The First Schedule to the Patents Rules sets official fees in bands, so the same application costs a natural person a fraction of what it costs a company. Electronic filing is cheaper than physical filing, and the reduced band has to be claimed and supported, not assumed. Select a band below to see the three fees every application incurs.
These are official Patent Office fees for electronic filing under the First Schedule, and they are revised by amendment from time to time — treat them as an order of magnitude, not a quotation. They do not include professional fees, renewal fees from the third year, or the cost of responding to examination and opposition.
Five mistakes that cost people their patent
Disclosing the invention before filing. A demonstration at a trade fair, a paper, a pitch deck circulated without confidentiality, or a product quietly put on sale destroys novelty. The limited grace period under section 31 is narrower than most people assume and is not a substitute for filing first.
Letting the examination request lapse. No request means no examination, and an application treated as withdrawn on this ground cannot be revived by explaining that the deadline was overlooked.
Treating the section 8 obligation as a one-time filing. Corresponding foreign applications must be kept disclosed as they develop. Non-compliance is a pleaded ground of revocation, raised routinely by opponents precisely because it is so often true.
Filing a thin provisional to save money. Priority attaches only to what the provisional describes. A two-page provisional followed by a forty-page complete specification gives most of the invention the later date — and hands a rival twelve months of usable prior art.
Conceding claim scope to clear an objection quickly. Every amendment made to get past the examiner narrows the monopoly permanently. Objections are negotiated, not simply accepted, and the difference shows up years later in an infringement suit.
Patent work at Patra’s Law Chambers
The chamber handles patent matters end to end — prior-art searching, drafting of provisional and complete specifications, filing and prosecution before the Patent Office, replies to examination reports, pre-grant and post-grant opposition, and the litigation that follows infringement. Work is conducted from Kolkata, which houses the head office of the Patent Office, and from New Delhi.
Established by a distinguished alumnus of IIT Kharagpur, Patra’s Law Chambers stands as a beacon of legal expertise in Kolkata & Delhi. Know more →
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Frequently asked questions
There is no fixed period. Publication happens at eighteen months, examination begins only after the request is filed, and the time from examination report to grant depends on the objections raised and how they are answered. Expedited examination, where the applicant is eligible for it, is the one lever that reliably shortens the sequence.
A computer programme per se is excluded by section 3(k). What is not excluded is an invention where the programme produces a technical effect beyond the ordinary running of software on hardware. The outcome turns almost entirely on how the claims are drafted, which is why software applications succeed and fail on drafting rather than on the underlying idea.
Possibly, but not always. Section 31 preserves novelty in a narrow set of situations, and the answer depends on what exactly was disclosed, to whom, and when. This needs to be assessed immediately rather than after another few months of exposure.
No. A patent is territorial. Protection in other countries requires filings there, usually through the Paris Convention route within twelve months of the Indian priority date, or through a PCT application that preserves the option for a longer period before national phase entry.
The patent ceases. It can be restored on an application made within the period prescribed for restoration, supported by evidence that the failure was unintentional — but restoration is discretionary, and third parties who began using the invention while the patent was lapsed acquire protection.
The inventor is always named as inventor, but ownership follows the contract of employment and any assignment. Where the employment agreement is silent or badly drafted, the question becomes a live dispute — usually at the worst possible moment, when the application is already on file.
Yes. Once the application is published, any person may file a pre-grant opposition under section 25(1). After grant, a person interested may oppose under section 25(2) within twelve months of publication of the grant, and revocation proceedings remain available beyond that.
Nothing prevents an applicant from filing personally. What an applicant cannot easily do is draft claims that survive examination and remain wide enough to be worth enforcing — and a specification cannot be broadened once filed, so drafting mistakes are permanent.