Section 17 of the Patents Act, 1970
Power of Controller to make orders respecting dating of application
Lets the Controller move a patent application's date forward, on request, by up to six months from the date it was actually filed.
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.
Read this as a plain-language summary. If it and the official text, or a relevant Gazette notification, say different things, the official text and the notification are what count.
What this section says, in plain language
Every patent application carries a date. That date decides what counts as earlier public knowledge against it, when later deadlines begin to run, and how the application ranks against a rival filing for the same idea. Section 17 gives the Controller of Patents a narrow power to change that date. The power runs in one direction only: forward. Moving a date forward is called post-dating.
An applicant who wants the application post-dated must ask the Controller for it. The Controller may allow the request, but the new date cannot be more than six months after the date on which the application was actually filed. Nothing in this section lets an application be back-dated to a day before the papers reached the Patent Office. That is the single most common misreading of the provision.
The section also deals with a second situation, where the date moves without anyone asking. If a document is filed but the Office requires it to be corrected or completed before it can stand, the Controller may direct that the application be dated as of the day the applicant actually meets that requirement. A careless filing can therefore lose weeks or months of seniority.
Post-dating is a trade-off, not a free extension. Pushing the date forward buys time, which matters most when a provisional specification has been filed and the complete specification is not ready. But everything that became public between the old date and the new date now counts as prior art against the application. Where a date is fixed by an earlier foreign filing under the convention or PCT route, that earlier priority is governed by those rules and is not shifted by a post-dating order under this section.
Why this section matters
Applicants who filed a provisional specification and need more time, and anyone whose filing reached the Patent Office incomplete.
Between filing and grant, most often while a provisional specification is still alive or when the Office raises a formality objection.
A discretionary power in the Controller to fix a later date for an application, capped at six months after the actual filing date.
The applicant may find the date has already moved, or may post-date straight into new prior art that destroys the novelty of the claims.
How it works in practice
Six months bought, one journal article lost
Kestrel Robotics Pvt Ltd, Pune, filed a provisional specification in March for a warehouse picking arm with a soft gripper. The complete specification had to follow within twelve months. By January the design had changed twice and the drafting was nowhere near done, so the company asked the Controller to post-date the application by four months. The Controller allowed it, and the application now carried a July date instead of a March one. That gave the team until the following July to file the complete specification. The cost appeared later. In May, between the old date and the new one, a research group had published a conference paper describing a very similar soft gripper. Because the application's date had moved to July, that paper now sat before the application's date and was cited against the gripper claims during examination. Kestrel kept the broader arm claims but had to surrender the gripper claim it had wanted most.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- Post-dating moves an application's date forward only. There is no power to back-date a filing.
- The outer limit is six months from the date the application was actually filed.
- The applicant has to ask; the Controller decides, and the decision is discretionary.
- A filing that has to be corrected can be dated from the day the defect is cured, with no request from anyone.
- Where a provisional specification is post-dated, the twelve-month period for filing the complete specification runs from the new date.
- Everything published between the original date and the new date becomes usable prior art.
Common mistakes and misunderstandings
- Believing an application can be dated back to the day the idea was conceived or the day a draft was signed. Only the day the papers reach the Office, or a later date, is available.
- Treating post-dating as a cost-free extension. Six extra months also means six extra months of the world's publications counting against the claims.
- Assuming a priority date claimed from an earlier foreign filing can be shifted this way. That date comes from the earlier application abroad and is governed by the convention and PCT provisions.
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
The Second Schedule to the Patents Rules contains the prescribed forms. A form that has been amended will not match an older saved copy, so take a fresh download from the official site before you fill anything in.
- An application cannot be post-dated to a date more than six months after the date it was actually filed.
- Where a provisional specification is post-dated, the twelve-month period for filing the complete specification runs from the new, later date.
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
Court decisions shape how this provision is applied, but a summary is useful only if it is right. Every case note on this site is read by a legal reviewer before it goes live, and none has been completed for this provision so far. This section will fill in as those reviews finish. How case notes are prepared.
Questions people ask about Section 17
Can a patent application be back-dated in India?
No. Section 17 lets the Controller give an application a later date, never an earlier one. The earliest date an ordinary application can carry is the day the papers were filed at the Patent Office. If an earlier date is needed, it has to come from a genuine earlier filing, such as a provisional specification or a convention application filed abroad, and it has to be claimed properly at the time of filing.
How far forward can an application be post-dated?
Up to six months from the date the application was actually filed. The Controller can allow less. Because the section fixes an outer limit rather than a right, an applicant should not assume a request will be granted, and should give the Controller a clear reason for asking. The request is made to the Controller in the manner set by the Rules, with the fee prescribed in the First Schedule.
Does post-dating a provisional specification give me more time for the complete specification?
In practice, yes, because the twelve-month period for filing a complete specification runs from the application's date, and post-dating changes that date. This is the most common reason applicants ask for it. The price is that any publication, public use or rival filing occurring in the added months moves ahead of your application and can be cited against your claims.
Can my application be post-dated without my asking?
It can effectively happen where a filing is not in order. If the Office requires a document to be corrected or completed before it can be treated as filed, the Controller may direct that the application be dated from the day the requirement is actually met. This is why filing a clean, complete set of papers matters: an avoidable defect can quietly move your date and your seniority.
Should you post-date your patent application?
MYCrave Consultancy weighs the extra time against the prior art risk before you ask the Controller to move your date.
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.