Form 7 — Notice of Post-Grant Opposition
Form 7 begins a post-grant opposition against a patent that has already been granted.
What Form 7 is for
A granted Indian patent is not beyond challenge. Section 25(2) allows an interested person to oppose a patent after grant by giving notice to the Controller. Form 7 is that notice. Filing it does not decide anything by itself, but it starts a full contested proceeding in which evidence is filed on both sides and an Opposition Board examines the case before the Controller decides.
Post-grant opposition is a substantive attack, not a formality challenge. The grounds available include that the invention was wrongfully obtained, that it was published or claimed earlier, that it was publicly known or publicly used in India before the priority date, that it is obvious, that it is not an invention within the meaning of the Act, that the specification does not sufficiently describe the invention, that the information required about foreign applications was not given or was false, and other grounds the section lists. The opponent chooses the grounds and must prove them.
What the form achieves is a route to have a patent revoked or amended by the Patent Office itself, which is usually less expensive than a revocation action before a High Court. Rule 55A deals with the filing of the notice. Since the Rules and the forms are amended from time to time, download the current Form 7 from the Indian Patent Office and check the current procedural timetable before relying on it.
Who files it, and when
Only a person interested may file it. That expression covers a person engaged in, or promoting, research in the same field, and more broadly a person whose commercial interests are affected by the patent, such as a competitor manufacturing in the same space or a body representing that industry. A person with no connection to the field cannot use this route, which is one of the main differences between post-grant and pre-grant opposition.
The notice must be given within one year from the date of publication of grant of the patent. That period runs from the publication of the grant, not from the date the patent was applied for and not from the date the opponent learned of it. It is a hard window: once it closes, the post-grant route is gone, and a challenger who still wants to attack the patent has to use revocation before the High Court or raise invalidity as a counter-claim in an infringement suit. Before grant is published, the pre-grant representation route applies instead.
How it is filed
- Confirm that the patent has been granted and that the grant has been published, and calculate the one-year window from that publication.
- Establish that the opponent is a person interested, and be ready to state the basis of that interest.
- Select the grounds under Section 25(2) that the evidence can actually support, rather than pleading everything.
- Prepare the written statement setting out the nature of the interest, the facts relied on and the relief sought, with the evidence.
- File the current Form 7 with the statement and evidence, and pay the fee prescribed in the First Schedule.
- Serve a copy on the patentee as the Rules require, and be ready for the patentee's reply statement and evidence.
- Participate in the Opposition Board stage and at the hearing before the Controller.
What the form asks for
- The number of the granted patent and the name of the patentee.
- The identity of the opponent and a statement of the interest that makes them a person interested.
- The grounds of opposition relied on, drawn from those Section 25(2) provides.
- A written statement of the case and the evidence supporting it, filed with the notice as the Rules require.
- Copies of the prior art or other documents relied on, in the form the Rules accept.
- An address for service in India for the opponent.
Described in general terms. Form contents are prescribed in the Second Schedule and change — download the current version from the Patent Office rather than working from any summary, including this one.
Common mistakes with Form 7
- Filing after the one-year window has closed. The period runs from publication of grant and cannot be stretched by pleading late discovery of the patent.
- Failing to establish that the opponent is a person interested, which can dispose of the opposition without the merits ever being reached.
- Filing the notice without the statement and evidence the Rules require it to be accompanied by.
- Pleading every available ground with no supporting material, which weakens the strong grounds by association.
- Relying on prior art that post-dates the priority date of the patent, which cannot anticipate it.
What happens if it goes wrong
If no post-grant opposition is filed within the year, the patent stands as against that route, and any later challenge must go to the High Court by way of revocation or be raised as a defence and counter-claim in infringement litigation. If an opposition is filed but not properly supported, it can be dismissed and the patent maintained, which strengthens the patentee's position commercially. If it succeeds, the Controller may revoke the patent or require the specification to be amended, and the patentee's rights change accordingly from that point.
A Nashik pump maker challenges a granted patent
This is a simplified illustration. Godavari Pumps Pvt Ltd of Nashik manufactures submersible pump impellers. A patent is granted to a competitor covering an impeller vane profile that Godavari believes it has been selling for years. The grant is published in the official journal in August. Godavari's agent gathers dated catalogues, invoices and a trade fair brochure from four years earlier that show the same profile on sale in India. In March of the following year, comfortably inside the one-year window, Godavari files Form 7 with a written statement setting out its interest as a manufacturer in the same field and pleading prior public use and lack of inventive step, supported by that documentary evidence. The patentee files a reply statement and evidence. An Opposition Board considers the material and reports, and the Controller hears both sides before deciding whether the patent should be revoked, maintained or maintained in amended form.
Simplified illustration only. Actual outcomes depend on the facts.
Questions about Form 7
How is post-grant opposition different from pre-grant opposition?
Pre-grant opposition is a representation that any person may make after the application is published and before the patent is granted. It is lighter, and the opponent has no automatic right to a full contested proceeding. Post-grant opposition can only be filed by a person interested, only after grant and only within one year of the publication of grant, and it runs as a full proceeding with evidence on both sides and an Opposition Board. Post-grant opposition attacks a right that already exists, so the stakes are higher.
Who qualifies as a person interested?
The Act describes a person interested as including a person engaged in, or in promoting, research in the same field as the invention. In practice it also covers those whose commercial activity is affected by the patent, such as manufacturers, importers or sellers working in the same technical space, and industry associations acting for them. The opponent should state the basis of the interest in the written statement. A challenger with no connection to the field is better placed to use the pre-grant route, which is open to anyone.
Can a post-grant opposition be filed while an infringement suit is pending?
The two proceedings exist in different places, one before the Controller and one before a court, and the interaction between them depends on the facts and on how the court manages its own case. This page explains the opposition route in general terms only. Anyone facing or contemplating litigation should take advice on their own matter, because decisions about where to raise invalidity, and when, have consequences for both proceedings and are not the kind of thing a general guide can answer.
What outcomes can a post-grant opposition produce?
After considering the Opposition Board's recommendation and hearing the parties, the Controller may revoke the patent, maintain it as granted, or maintain it subject to amendment of the complete specification. Amendment often means narrowing the claims so that they avoid the prior art relied on. A patent maintained after opposition is not immune from later challenge, but the opposition record becomes part of the file and is usually taken into account by anyone assessing the patent afterwards.
Considering a post-grant opposition in India?
MYCrave Consultancy & Services helps interested parties assess grounds and evidence within the one-year window.