Section 81 of the Patents Act, 1970
Disposal by Controller of applications for extension of time
Governs how the Controller deals with requests for more time to do something under the Act or the Rules.
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.
The authority is the enacted text, not this page. Where our wording and the official provision, or an applicable Gazette notification, do not match, the official material prevails.
What this section says, in plain language
Patent work runs on deadlines, and people miss them. Section 81 is the provision that tells the Controller how to handle a request for more time. Its core message is simple: an extension is something you must ask for and the Controller must decide. It is not a right that follows automatically from filing a request and paying a fee.
The Controller decides on the material placed before him. Where the request is straightforward and the Controller is satisfied, it can be disposed of without an elaborate hearing, which is what keeps routine extensions quick. Where the Controller proposes to refuse, section 80 applies, so the applicant must be given an opportunity to be heard before the refusal is passed. A refusal is an order like any other and can be challenged on appeal.
The machinery for extensions lives mainly in the Rules. Rule 137 lets the Controller allow the amendment of documents and condone irregularities in procedure where that can be done without detriment to anyone. Rule 138, as amended in 2024, allows the Controller to extend the time prescribed by the Rules, or to condone a delay, by up to six months, on a request made in Form 4 with the prescribed fee, filed before that six month window closes. The extension is discretionary; the Rule uses the language of the Controller thinking it fit.
There is a boundary worth learning early. The Controller can extend periods that the Rules prescribe. Periods fixed by the Act itself are a different matter, and the Controller has no general power to enlarge them. That is why some deadlines - the request for examination timeline, renewal payment and its grace period, the periods governing restoration of a lapsed patent - are handled through their own specific provisions rather than by a general extension request. Before assuming a deadline can be extended, check whether it comes from the Act or from the Rules.
Why this section matters
Applicants and patentees who have missed or are about to miss a deadline, and the agents managing their docket.
The moment a deadline is at risk, and in any event before the extension window itself expires.
A structured route for seeking more time, a discretion in the Controller to grant or refuse it, and a duty to hear you before refusing.
An application can be treated as abandoned or a patent can lapse, and the remedy afterwards is far more expensive and far less certain.
How it works in practice
A monsoon flood and a missed reply date
A Sivakasi printing machinery firm receives a first examination report with a long list of objections. Its factory and its records are flooded in November and the technical staff who must supply comparative data are unavailable for weeks. The reply date approaches with the response half drafted. Instead of filing an inadequate response or letting the date pass in silence, the firm's agent files a request on Form 4 with the prescribed fee, explaining the flooding, attaching the district authority notice, and asking for the extension permitted under the Rules. The Controller allows the additional time. The firm files a complete response with the comparative data three months later and eventually secures a grant with amended claims. Had the agent instead assumed the office would be sympathetic without a formal request, the application would have been treated as abandoned, and no amount of explanation afterwards would have restored it as simply.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- Extensions must be requested; they are never automatic.
- The Controller decides on the material filed, and can dispose of routine requests quickly.
- Before refusing, the Controller must give an opportunity of being heard under section 80.
- Rule 138 allows extension or condonation of delay of up to six months, on a request in Form 4 with the prescribed fee.
- The request must be made before that six month window ends.
- Periods fixed by the Act itself, rather than by the Rules, generally cannot be extended this way.
Common mistakes and misunderstandings
- Filing the extension request after the extension window has closed. The request has to come in time, and lateness cannot be cured by a further request.
- Assuming every deadline is extendable. Some periods come from the Act and are handled only by their own provisions.
- Treating payment of the fee as the end of the matter. The Controller still exercises discretion and can refuse.
Connected provisions
You will find the related rules grouped below rather than inside the explanation. The separation is deliberate. The Act and the Rules are distinct legal instruments, and mixing them can lead a reader to attribute a procedural requirement to the statute itself.
Forms, deadlines and fees
Forms are not set out in the Act. They are prescribed in the Second Schedule to the Patents Rules and are revised from time to time, so obtain the current version from the official website before filing.
- Rule 138 permits an extension of time, or condonation of delay, of up to six months, and the request must be filed before that six month period expires.
- The original deadline stands unless and until the Controller allows the extension, so keep working to the original date.
- Where the deadline arises from the Act rather than the Rules, this route is generally not available - check the specific provision.
Open the deadline calculator — and have every date confirmed against the current Rules before you rely on it.
This site does not carry a fee table. The First Schedule to the Patents Rules is the source, the rates vary with the applicant's category and with the mode of filing, and a figure quoted second-hand goes out of date quietly. 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 Section 81
Can the request for examination deadline be extended?
The period for filing a request for examination is prescribed by the Rules, and Rule 24B as amended in 2024 fixes it at thirty one months from the priority date. Whether more time can be obtained is a question of what the current Rules allow and how the Controller exercises discretion, and the position has been litigated. Do not plan on an extension. Diarise the thirty one month date from the earliest priority and file well before it, because an application for which no request for examination is filed in time is treated as withdrawn.
What should an extension request actually say?
It should identify the deadline, state the period sought, and give a genuine reason supported by whatever proof exists - a medical record, a natural disaster notice, correspondence showing a change of agent, or a document awaited from a foreign office. A bare request with no explanation invites refusal. Keep it short and factual, and file it before the deadline you are trying to extend rather than afterwards where the Rules require that.
Is condonation of delay the same as extension of time?
They sit in the same rule but do different work. An extension moves a deadline that has not yet passed. Condonation excuses a delay in doing something that should already have been done. Both are discretionary, both are limited by the outer period the Rules fix, and both require a request in the prescribed form with the fee. The practical difference is that condonation usually requires a better explanation, because you are asking to be excused rather than accommodated.
Can I appeal if my extension request is refused?
A refusal is an order of the Controller and, before it is passed, section 80 entitles you to a hearing. Whether an appeal lies to the High Court depends on whether the order falls within the list of appealable orders in section 117A, so take advice quickly rather than assuming. In many cases the refusal also decides the fate of the underlying application, and it is that consequence which shapes the challenge.
About to miss a patent office deadline?
MYCrave Consultancy prepares extension and condonation requests and tells you honestly which deadlines can still be saved.
You will be speaking with MYCrave Consultancy & Services, the firm that operates this platform. General questions are answered free; matter‑specific work is quoted before anything is done.