Rule 19F of the Patents Rules, 2003
Indian International Preliminary Examining Authority
Rule 19F allows the Indian Patent Office to act as an International Preliminary Examining Authority under Chapter II of the Treaty.
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.
This explanation is written for clarity, not for citation. The official statutory text and any Gazette notification in force on your date govern, and they prevail over anything said here.
What this rule requires, step by step
International preliminary examination is the optional second look at an international application. Where the search report and written opinion are prepared without hearing from the applicant, preliminary examination is a dialogue: the applicant demands it, may amend the description, claims and drawings, may put arguments, and receives a fuller report at the end. Rule 19F is the provision under which the Indian Patent Office performs that role, once it has been appointed under the Treaty and the necessary agreement with the International Bureau is in force. India has acted as both searching and preliminary examining authority since October 2013.
Competence follows the search. In broad terms the Indian office is available as a preliminary examining authority for applications connected to it, typically those filed with an Indian receiving office and those it has searched as International Searching Authority. The applicant asks for the examination by filing a document called a demand, which is dealt with in Rules 19G to 19I, and pays the preliminary examination fee together with the handling fee for the International Bureau.
Whether to use Chapter II at all is a genuine strategic question. Before 2004 a demand was often filed simply to extend the national phase deadline. That reason has gone: for most countries the thirty or thirty-one month period now applies whether or not a demand is made, and India allows thirty-one months from the priority date regardless. So the modern reasons for demanding examination are substantive. You may want to put amended claims and reasoned arguments on the international record before national offices see the file. You may want to convert a hostile written opinion into a favourable report. You may be dealing with several countries and prefer to fight one battle centrally rather than five separately.
The reasons against are equally real. It costs more, it takes examiner and agent time, and the resulting report binds nobody. In India, national phase examination proceeds under Sections 12 and 13 with the timelines in Rule 24B whatever the international report says. If your claims are already in good shape, or if you intend to enter only one or two countries, the money may be better spent on drafting a strong national phase response.
One point of language often confuses newcomers. The authority carrying out the international preliminary examination is not deciding whether you get a patent. It is giving a considered, published opinion on novelty, inventive step and industrial application. Grant remains entirely a matter for each national office.
Why this rule matters
Applicants in the international phase deciding whether to use Chapter II, particularly those who received an unfavourable written opinion.
After the international search report and written opinion arrive, within the period for making a demand.
The legal basis for the Indian Patent Office to conduct international preliminary examination and to charge the prescribed fee for it.
Applicants either pay for a Chapter II examination that adds nothing, or skip it in a case where a corrected international record would have smoothed the way in several countries.
How it works in practice
When Chapter II was worth the money
Prayag Polymers Pvt Ltd of Kanpur received a written opinion saying its three independent claims lacked an inventive step over a combination of two documents, and that the application covered two inventions rather than one. The company intended to enter the national phase in five countries. Its agent calculated that answering the same objections separately in five offices would cost far more than one Chapter II examination. Prayag filed a demand in time, restricted the claims to the single crosslinking method described in its examples, deleted the second invention, and filed a reasoned submission explaining why the combination of the two cited documents was not obvious. The preliminary examination report that followed found the amended claims novel and inventive. No office was bound by that finding, but three of the five national examiners raised no inventive step objection at all, and the Indian Controller's report was confined to formal matters. The demand paid for itself several times over.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- Rule 19F lets the Indian Patent Office act as an International Preliminary Examining Authority.
- Preliminary examination is optional and begins only when the applicant files a demand.
- It allows amendments to the description, claims and drawings and lets the applicant put arguments.
- A demand no longer buys extra time, because the national phase period generally applies either way.
- The resulting report is persuasive but binds no national office, including the Indian Controller.
- It is most useful where the written opinion was hostile and several national phase entries are planned.
Common mistakes and misunderstandings
- Filing a demand to extend the national phase deadline. That reason disappeared when the longer period became generally available.
- Believing a favourable preliminary examination report guarantees grant. Each national office examines independently under its own law.
- Demanding examination for a single-country strategy, where the same money is usually better spent on the national phase response.
Connected provisions
Every rule traces back to a section. The linked sections are shown apart from the rule because the two are separate instruments, and because a rule that goes beyond its parent section can be challenged. Knowing the parent provision is part of reading the rule properly.
Forms, deadlines and fees
- A demand for international preliminary examination must be filed within the period set by Rule 19G, which runs from transmittal of the search report and written opinion or 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.
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
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 19F
What is international preliminary examination under the PCT?
It is an optional examination in the international phase, carried out by an appointed authority after the applicant files a demand. Unlike the search stage, it is interactive: the applicant may amend the description, claims and drawings and file arguments, and the examiner may issue a written opinion inviting a response. It ends with a reasoned report on whether each claim appears novel, inventive and industrially applicable. It does not grant anything; every country still examines the application under its own law.
Is it worth demanding preliminary examination in India?
It depends on your position. It is usually worth it where the written opinion was unfavourable, where the claims need reshaping, or where you intend to enter several national phases and would otherwise argue the same points separately in each. It is usually not worth it where the opinion was clean, where you plan to enter only one or two countries, or where your budget is better spent on strong national phase responses. It no longer buys extra time before the national phase deadline.
Does a favourable preliminary examination report bind the Indian Controller?
No. When the application enters the Indian national phase it is examined afresh under Sections 12 and 13, within the timelines in Rule 24B, and the Controller can raise objections the international authority never considered, including objections under Section 3 on what does not count as an invention in India. A favourable report often narrows the argument and shortens prosecution, which is a practical benefit, but it creates no entitlement to grant.
Should you demand international preliminary examination?
MYCrave Consultancy weighs the cost against your country list and runs the Chapter II process end to end.
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