Rule 29A of the Patents Rules, 2003
Grace period
Gives the form and route for claiming the twelve month grace period where the invention was disclosed in one of the situations the Act protects.
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.
Treat this page as a guide. The provision as officially published, along with the Gazette notifications that apply to it, remains the governing text and overrides any simplification here.
What this rule requires, step by step
Indian law is strict about novelty. If an invention is disclosed to the public before the application is filed, it is normally no longer new and cannot be patented. The Act carves out a small number of exceptions, and for those the applicant gets twelve months of protection: a disclosure falling within an exception does not defeat an application filed within twelve months of it. Rule 29A supplies the procedure. The claim to that benefit is made on Form 31 with the prescribed fee.
The exceptions are narrow and specific. They cover display of the invention at an industrial or other exhibition notified by the central government, and use of the invention at the place of that exhibition for its purposes. They cover a description of the invention published as a result of that display or use. They cover use of the invention, after the display, with the consent of the true and first inventor. And they cover a paper describing the invention read by the true and first inventor before a learned society, or published with the inventor's consent in the transactions of such a society.
What is not covered matters more to most inventors. A product launch is not covered. A demonstration to customers is not covered. A crowdfunding page, a YouTube video, a trade fair that has not been notified, a journal article submitted by a co-author, a poster at an ordinary conference and a pitch made without a confidentiality agreement are all outside the exceptions. India has no general grace period of the kind that exists in some other countries, and inventors who rely on stories about a one year window from any disclosure lose their rights.
The procedural rule was introduced by the Patents (Amendment) Rules, 2024, and it removes an old uncertainty. Previously the benefit was claimed in correspondence with no dedicated form. Now there is a form and a fee, which means the claim goes on the file as a distinct request and the examiner can consider it properly. It is sensible to file the claim early rather than waiting for the examiner to cite the disclosure.
The claim also has to be supported. Keep the notification of the exhibition, the dated programme or catalogue, the proof of the reading before the society, or the consent that was given. A grace period claim without evidence is easy to raise and hard to sustain.
Why this rule matters
Inventors, universities and startups whose invention was displayed at a notified exhibition or described in a paper read before a learned society.
Within twelve months of the protected disclosure, and formally at or during prosecution of the application.
A route to have a specified earlier disclosure disregarded when novelty is assessed.
The disclosure counts as prior art, the applicant's own exhibition or paper destroys the application, and nothing can be done to reverse it.
How it works in practice
A notified exhibition, a paper, and one careless post
A team at a Coimbatore engineering college develops a low-cost husk gasifier. In January they display it at an industrial exhibition notified by the central government, and in March the lead researcher reads a paper on it before a recognised learned society. In April a student posts a detailed video of the working prototype on a public channel, explaining the internal baffle design. The college files a patent application in September. When the examiner cites the exhibition and the paper, the college claims the grace period on Form 31 with the prescribed fee, filing the notification of the exhibition, the catalogue entry and the society's programme. Those disclosures are disregarded, because the application was filed within twelve months of them. The student's video is a different matter. It falls within none of the exceptions, and it becomes prior art against the baffle design. The claims have to be narrowed to features the video never showed.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- The benefit is claimed on Form 31 with the prescribed fee.
- The application must be filed within twelve months of the protected disclosure.
- Only specified disclosures qualify, such as a notified exhibition or a paper read before a learned society.
- Ordinary product launches, videos, unnotified trade fairs and casual disclosures are not protected.
- Supporting evidence of the disclosure and its date should be kept and filed.
- Other countries have different rules, so an Indian grace period claim does not save foreign filings.
Common mistakes and misunderstandings
- Believing India gives a general one year grace period after any public disclosure. It does not.
- Assuming an exhibition qualifies without checking whether it was notified by the central government.
- Treating a talk at an ordinary industry conference as a paper read before a learned society.
- Claiming the grace period but keeping no dated evidence of the exhibition, catalogue or society programme.
- Forgetting that a disclosure protected in India may still destroy novelty in other countries.
Connected provisions
Because this page covers a rule rather than a section, the related Act provisions are shown in their own list. The section tells you what the law requires. The rule, explained above, tells you how the Patent Office expects that requirement to be met.
Forms, deadlines and fees
- Form 31 (check the current Second Schedule)
Any form mentioned here is prescribed by the Second Schedule. Amendments to the Rules often bring new versions of forms with them, so use the version currently published by the Patent Office, not a template from a book or an old file.
- The application must be filed within twelve months of the protected disclosure for the grace period to apply.
Open the deadline calculator — and have every date confirmed against the current Rules before you rely on it.
Fees are prescribed in the First Schedule to the Patents Rules. Because the Schedule is revised from time to time, and charges different amounts to different categories of applicant and for physical as against electronic filing, this page describes the fee without stating a figure. How Indian patent fees work.
Amendment history
What changed in this provision, newest first. Read the footnotes in the official consolidated text for the full record.
- 2024The Patents (Amendment) Rules, 2024The rule was inserted. A formal route was created for claiming the benefit of the grace period under section 31, by a request in the prescribed form with the fee.
Compiled from official consolidated texts and Gazette notifications. See the site-wide change log.
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 29A
Does India have a one year grace period like the United States?
No. The Indian exceptions are narrow and situation-specific: a government-notified exhibition, use at that exhibition, publication resulting from it, use with the true and first inventor's consent after the display, and a paper read before a learned society or published in its transactions. Everything else, including product launches, sales, videos and ordinary conference talks, counts as prior art. The safe rule for an Indian inventor is to file before disclosing anything publicly.
What counts as a learned society?
The expression covers established scientific, technical or professional bodies that hold meetings at which papers are read and that publish transactions of those meetings. A commercial trade show organiser or an informal industry meetup is not what the provision has in mind. Because the point can be argued, keep the society's programme, the dated proceedings and any correspondence showing that the paper was read by the inventor, and file that material with the claim.
When should I file Form 31?
File it as soon as you know a protected disclosure exists, ideally with or shortly after the application, rather than waiting for an examiner to cite your own exhibition against you. Filing early puts the claim and the supporting evidence on record while documents are easy to obtain and memories are fresh. It also lets the examiner take the exception into account from the outset instead of raising an objection that then has to be answered within a compressed reply period.
Will my grace period claim protect my foreign applications?
No. Each country applies its own rules. Some jurisdictions have broad grace periods, some have narrow exceptions like India, and some have almost none. A disclosure that is excused in India may be fatal elsewhere. If foreign protection matters, plan the filing strategy before any disclosure, and where a disclosure has already happened, get advice quickly on which countries remain open to you.
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