Rule 19G of the Patents Rules, 2003
Period for making a demand
Rule 19G fixes the deadline for filing a demand for international preliminary examination with the Indian authority.
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
Chapter II of the Treaty is available only if the applicant asks for it in time. The request is called a demand, and Rule 19G sets the period for making it. The demand must be made before the expiry of three months from the date on which the international search report and the written opinion, or a declaration that no search report will be established, were transmitted to the applicant, or twenty-two months from the priority date, whichever of the two expires later. The Treaty Regulations contain the same rule, and they are the source you should check if anything turns on a single day.
The two limbs work together in a way that repays a moment's thought. An applicant who receives the search report early, say at nine months from priority, is not squeezed into a three month window: the twenty-two month limb keeps the door open much longer. An applicant whose report is transmitted late, close to or beyond twenty-two months, is not shut out either, because the three month limb runs from transmittal. Whichever gives the applicant more time is the one that applies.
The consequence of missing the period is blunt. A demand filed late is treated as if it had not been submitted, and the international phase then continues without Chapter II. Nothing is lost forever, because the application can still be taken into the national phase in each country and amended there under national law. What is lost is the chance to fix the international record once, centrally, before national examiners read it.
Timing also interacts with the fees. The preliminary examination fee for the authority and the handling fee for the International Bureau are payable in connection with the demand, and a demand accompanied by no fee or the wrong fee can end up being treated as not made. So the practical deadline for an applicant is not the last day of the period but a week or two earlier, allowing for bank transfers, currency conversion and the possibility of a query on the payment.
One planning point is easy to miss. Because Chapter II no longer extends the national phase deadline in most countries, the demand period and the national phase period run alongside each other rather than one after the other. An applicant who files a demand at twenty-two months and receives the preliminary report near twenty-eight months has only a short interval before national phase entries fall due. Budget for both, and diarise both.
Why this rule matters
Applicants who want amendments and arguments considered in the international phase, and the agents who diarise their PCT deadlines.
After the search report and written opinion are transmitted, and before the later of the two dates in the rule.
A firm deadline for demanding international preliminary examination, with the later of two computed dates applying.
The demand is treated as not submitted, Chapter II is lost, and every objection must be answered separately in each national phase.
How it works in practice
Two dates, and only one of them mattered
An IIT Kanpur spin-off received the search report and written opinion on its catalytic converter coating fourteen months after its priority date. The written opinion was negative on inventive step. The team's project manager assumed the deadline for a demand was three months away and put it in the calendar for the seventeenth month. The firm's paralegal recalculated: because twenty-two months from the priority date expired later than three months from transmittal, the later date governed, and the spin-off had a further eight months. That mattered, because the inventors needed time to run comparative experiments showing an unexpected improvement over the cited catalyst. They filed the demand in the twenty-first month with amended claims and the comparative data, and the resulting report accepted inventive step. Had they worked from the earlier date and rushed, the argument would have gone in without the data that actually won it.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- A demand must be filed within three months of transmittal of the search report and written opinion, or twenty-two months from the priority date, whichever expires later.
- Always calculate both dates; the later one is your deadline.
- A demand made after the period is treated as if it had never been submitted.
- The preliminary examination and handling fees must be dealt with in connection with the demand.
- Missing the demand period does not end the case; you can still amend during each national phase.
- The demand period runs alongside the national phase period, so plan for both at once.
Common mistakes and misunderstandings
- Working from only one limb of the rule and filing far earlier or far later than necessary.
- Leaving the demand to the last day and then discovering that the fee payment has not cleared.
- Believing that filing a demand postpones the national phase deadline. In general it does not.
Connected provisions
This page explains a rule of the Patents Rules, 2003. A rule does not stand on its own; it works out a duty or a power that the Patents Act, 1970 has already created. The parent sections are listed separately so you can read the source of that authority.
Forms, deadlines and fees
- A demand for international preliminary examination must be made before the expiry of three months from the date of transmittal of the international search report and written opinion, or twenty-two months from the priority date, whichever expires later.
Open the deadline calculator — and have every date confirmed against the current Rules before you rely on it.
We do not publish fee amounts. The First Schedule sets them, and they differ by category of applicant, such as a natural person, a startup, a small entity or another applicant, and by the mode of filing. Check the Schedule currently in force before you calculate anything. 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 Rule 19G
When is the deadline to file a PCT demand?
Calculate two dates and take the later one: three months from the day the international search report and written opinion were transmitted to you, and twenty-two months from your priority date. If your report arrived early, the twenty-two month date usually governs. If it arrived late, the three month date usually governs. The same rule appears in the Treaty Regulations, so check the current text if a single day matters, and file with a margin rather than on the final day.
What happens if I file the demand late?
It is treated as though it had not been submitted, and the international phase carries on without preliminary examination. You do not lose the application. You can still enter the national phase in each country within the applicable period, and amend and argue there under national law. What you lose is efficiency: the objections in the written opinion will now have to be answered office by office, in each country's language and format, instead of once at the international level.
Does filing a demand extend the time to enter the national phase?
For most countries, no. That was the position long ago, and it is why demands were once filed routinely. Today the longer national phase period generally applies whether or not a demand is filed, and India allows entry within thirty-one months from the priority date either way. So a demand should be filed for what it actually gives you, namely a chance to amend and argue centrally, rather than in the hope of buying time you already have.
Not sure when your PCT demand is due?
MYCrave Consultancy calculates both limbs of the deadline and files your Chapter II demand with time to spare.
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