Rule 28 of the Patents Rules, 2003
Procedure in case of anticipation by prior publication
Sets out the steps the Controller follows when the search shows that the invention was already published before the applicant's priority date.
Official legal text
The verbatim statutory text of this provision is reproduced from the official source and checked by our legal reviewer before it is published here. Until that check is complete for this page, read the exact wording directly from the official source linked below — it is the only version that governs.
Nothing here replaces the statute. The official wording of the provision, together with any Gazette notification that applies to it, governs. This page only explains that material in ordinary language.
What this rule requires, step by step
During examination the examiner searches for earlier documents that describe the same invention. If such a document exists and was published before the applicant's priority date, the invention is not new. The Act gives the Controller specific powers in that situation, and Rule 28 supplies the procedure for using them fairly.
The first step is disclosure to the applicant. The Controller communicates the substance of the objection, identifying the document relied on, so that the applicant knows exactly what has to be answered. An objection cannot be sprung on an applicant at the end.
The applicant then has a choice of responses, and often uses more than one. The claims can be amended to exclude what the earlier document discloses, so that what remains is new. The applicant can argue that the citation does not anticipate at all, for example because it does not disclose every feature of the claim, because it does not enable a skilled person to work the invention, or because it belongs to a different technical context. Or the applicant can show that the priority date of the claim is not later than the date on which the earlier document was published, which takes the document out of consideration.
If the matter is not resolved on paper, the applicant is entitled to be heard before the Controller decides against the application. The rule provides for a hearing, with advance notice of the date, and for written submissions to be filed after the hearing within the short period the Rules allow. Hearings are now commonly held by video conference. The exact notice and submission periods are fixed by the Rules and should be checked in their current form.
The outcome depends on what the applicant does. If an amendment removes the objection, the application proceeds. If the Controller is not satisfied, the application can be refused, and that refusal is a decision that can be appealed. Everything in this process has to fit inside the period allowed for putting the application in order for grant, which is why an applicant who leaves the reply to the last weeks may lose the chance of a hearing altogether.
Why this rule matters
Applicants whose examination report cites an earlier publication against novelty, and their drafting agents.
During examination, after the search reveals a prior publication with an earlier date.
A right to be told the objection, to answer it by amendment or argument, and to be heard before an adverse decision.
The objection stands unanswered, the application is refused or lapses, and the applicant loses the chance to save narrower claims that were genuinely new.
How it works in practice
Narrowing a claim to survive a cited publication
Ananya Rao, an independent inventor in Kochi, applies for a patent on a floating water quality sensor. The examiner cites a research paper published three years before her priority date describing a floating sensor with the same body shape and the same solar cell. The paper does not describe her anchoring skirt, which stops the sensor drifting in tidal water and is the reason her device works in estuaries. The Controller communicates the objection with the paper attached. Ananya, advised by an agent, files a reply that amends claim 1 to include the anchoring skirt with its specific taper, and explains why the paper's tethered arrangement is different in structure and result. She also files field data from a trial in the Vembanad backwaters. The Controller is not fully persuaded on the record and fixes a hearing, after which written submissions are filed. The amended claim is allowed. The broad claim she originally filed was never going to survive.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- The Controller must tell the applicant the substance of the anticipation objection and identify the document.
- The applicant may amend the claims, argue that the document does not anticipate, or show that the claim's priority date is earlier.
- A hearing must be offered before the application is refused on this ground.
- Written submissions follow the hearing within the short period allowed by the Rules.
- Everything must be completed inside the period for putting the application in order for grant.
Common mistakes and misunderstandings
- Arguing only that the cited document is old or from a different country. What matters is what it discloses and when it was published.
- Amending claims so heavily that nothing commercially useful is left, when a narrower but meaningful amendment would have sufficed.
- Skipping the hearing request. Once the deadline passes, the opportunity to explain the technical difference in person is gone.
- Overlooking the possibility that the priority date of the claim defeats the citation entirely.
Connected provisions
The Patents Rules supply procedure and the Patents Act supplies power. This page covers the procedure, and the sections that give the Controller or the applicant the underlying right or duty are grouped separately so you can move between the two.
Forms, deadlines and fees
Where a fee is payable under this provision, the figure comes from the First Schedule. Categories of applicant are charged at different rates, and electronic filing is treated differently from paper filing, so an accurate number can only come from the Schedule in force on the day you file. How Indian patent fees work.
Related judgments
Case summaries are published only after a qualified reviewer has checked the judgment, the citation and the way the holding is described. Nothing has cleared that review for this provision yet, so nothing is listed here. We would rather show no case note than one that misstates what a court decided. How case notes are prepared.
Questions people ask about Rule 28
What makes a document anticipate my invention?
A single earlier document must disclose everything in the claim, clearly enough that a skilled person could work the invention from it, and it must have been available to the public before your priority date. If the document discloses only some features, or if features have to be combined from two documents, that is an inventive step question rather than anticipation. This distinction matters, because the answer to an anticipation objection is often a narrow amendment, while an inventive step objection usually needs technical reasoning and data.
Can my own earlier publication be cited against me?
Yes. Indian law does not give a general grace period for an inventor's own disclosure. A paper, conference presentation, product launch or website post made before the priority date can defeat the application, even if it was the inventor's own work. Narrow exceptions exist for specified situations such as display at a notified exhibition or a paper read before a learned society, and those must be claimed properly using the prescribed route. The safe practice is to file before disclosing.
Should I amend the claims immediately or argue first?
That is a strategic decision. Amending narrows your protection permanently, so it is worth first checking whether the citation genuinely discloses every feature. If it plainly does, arguing wastes part of a short reply period. Many well-run responses do both: they argue the primary position and offer an amended claim set as an alternative, so the Controller has a route to allowance without the applicant conceding more than necessary.
What if I disagree with the Controller's final decision?
A decision refusing an application is appealable to the High Court under the appeal provisions of the Act, following the transfer of this jurisdiction from the former Appellate Board. Appeals have their own time limits and procedural requirements, and they are argued on the record made before the Controller. That is another reason to build a complete record during examination, with clear technical explanations and any supporting data, rather than relying on brief assertions.
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