When a PCT international application designating India was not filed and not published in English, the applicant must file a verified English translation before the 31-month deadline under Rule 20(3)(b) of the Patents Rules 2003. Missing this deadline has one consequence: the application is deemed withdrawn under Rule 22, and Rule 137(2)(b) bars any extension.
Jurisdictional scope: This article covers Indian domestic obligations under the Patents Act 1970 and the Patents Rules 2003. WIPO-level PCT restoration mechanisms are not addressed here; a separate article addresses options where the 31-month deadline has already been missed.
Quick answer
- The translation obligation triggers only where the international application was not filed and not published in English. Both variables (filing language and publication language) should be checked before instructing a translation vendor.
- The verified English translation must reach the Indian Patent Office before the 31-month deadline measured from the PCT priority date, alongside payment of the prescribed national fee.
- The main translation deadline is hard. Rule 137(2)(b) removes it from the Controller’s general condonation power, and Rule 22 declares the application withdrawn on non-compliance.
- A separate three-month invitation window under Rule 21(3) applies only to the priority document and its translation. Missing that window costs the priority claim, not the application.
Which PCT applications must file an English translation in India
Rule 20(3)(b) of the Patents Rules 2003 attaches the translation obligation to a narrow trigger. An applicant entering the Indian national phase must file “a translation of the application in English, duly verified by the applicant or the person duly authorised by him that the contents thereof are correct and complete”, but only “where the international application was either not filed or has not been published in English”. The trigger therefore turns on two variables: the language of the international filing and the language of the international publication. Rule 20(3)(b) itself is textually terse on how the two variables interact, and the operative Registry position, set out in the Manual of Patent Office Practice and Procedure, is that a filing or publication in English (or Hindi) suffices to satisfy the obligation. A foreign applicant should not read the position from the filing language alone; both variables should be checked, and the operative reading should be confirmed with the Indian agent before the vendor scope is fixed.
The Manual of Patent Office Practice and Procedure, at section 07.03.02, restates the Registry’s operative position. It reads Rule 20(3)(b) as attaching the obligation where the application “has not been filed or published in one of the official languages (Hindi or English)”. The Manual’s addition of Hindi to the accepted-language list reflects Rule 19(1) of the Patents Rules 2003, under which an international application must be filed with the appropriate office in triplicate either in English or Hindi. In practice, this means an applicant with a Hindi-language filing does not need to submit an English translation for Indian national phase entry, although publication practice under PCT Rule 48 continues to determine what language the published international application appears in.
A foreign counsel handling an inbound national phase filing should confirm at the outset which of the ten publication languages the international application was published in. If the application was published in English (Arabic, Chinese, French, German, Japanese, Korean, Portuguese, Russian, and Spanish being the other nine), no translation is required for India, regardless of the original filing language. Our overview of the Patent Cooperation Treaty framework in India sets out how the international phase and national phase interlock.
What the verified translation must cover
Rule 20(5) prescribes the scope of the translation. It is not confined to the claims. It must cover:
- The description;
- The claims as filed;
- Any text matter of the drawings;
- The abstract;
- Where the applicant has not elected India and the claims have been amended under Article 19, the amended claims together with any statement filed under Article 19; and
- Where the applicant has elected India, any amendments to the description, the claims, and text matter of the drawings that are annexed to the International Preliminary Examination Report.
Items 5 and 6 are conditional. They apply only if the applicant made amendments during the international phase. Items 1 through 4 apply in every case.
The verification formality is the applicant’s own statement or that of a duly authorised person. The Rule does not require certification by a sworn translator or notarisation. This aligns with PCT Rule 51bis.1(d)(i), which permits designated Offices to require verification but not systematic certification. Certification is only requested where the Indian Patent Office reasonably doubts the accuracy of the translation.
A practical note on the translated title: the Manual, at section 07.03.02 item 4, records that where the IB’s title translation and the applicant’s verified translation of the title differ, the applicant’s verified version is taken on record. The applicant should ensure the translation vendor renders the title as it should appear on the Indian register, not merely as an equivalent of the IB rendering.
The 31-month deadline and why it cannot be extended under Indian law
Rule 20(4)(i) sets the deadline. The time limit for filing the application, paying the national fee, and furnishing any required translation is 31 months from the priority date, computed under Article 2(xi) of the PCT. Rule 22 then attaches the consequence for failure to comply with any Rule 20 requirement: the international application designating India “shall be deemed to be withdrawn if the applicant does not comply with the requirements of rule 20”.
The question every foreign counsel eventually asks is whether the Controller’s general extension or condonation powers can save a missed 31-month deadline. Under the Rules as they stand, the answer is no. Rule 137(2)(b) expressly removes “clause (i) of sub-rule (4) and sub-rule (6) of rule 20” from the Controller’s irregularity-correction power under Rule 137(1).
Rule 138, which permits extension of time by up to six months on Form 4, opens with “notwithstanding anything contained in these rules”. A textualist reader could argue this overrides Rule 137(2)(b)’s carve-out. The operative position adopted by the Patent Office, and reflected in the WIPO India National Chapter, is that Rule 20(4)(i), Rule 20(6), and Rule 21 are treated as excluded from both Rule 137’s irregularity-correction power and Rule 138’s extension power. This is why practitioners treat the 31-month PCT national phase deadline in India as an effectively hard deadline. There is no equivalent of the two-month late-entry surcharge window some other national laws offer.
| Callout: hard deadline. |
| The 31-month national phase deadline in India is not extendable under the Patents Rules 2003. Rule 137(2)(b) carves it out of the Controller’s general power, Rule 138’s six-month extension is treated in operative practice as not reaching it, and Rule 22 declares the application withdrawn on non-compliance. PCT-level restoration under Rule 49.6 is also unavailable: India has notified WIPO of the incompatibility of Rule 49.6 with its national law, and the WIPO India National Chapter confirms that reinstatement under Rule 49.6 does not apply. Any post-deadline strategy is therefore a case-specific matter, not a routine restoration option. Readers already in that position should refer to our article on options after a missed PCT national phase entry in India. |
An express request under Rule 20(4)(ii) allows the applicant to have the Patent Office start processing or examining the application before 31 months. That request is filed on Form 18 with the fee prescribed in Entry 28(ii) of the First Schedule. Rule 20(4)(ii) accelerates processing; it does not create any exception to the Rule 20(3) translation obligation or its underlying time limit. National phase applicants separately carry the Section 8 statement and undertaking obligation, which turns on the filing date and on any First Examination Report timing, and is unaffected by whether an early-processing request has been made.
Article 19 and Article 34 amendments: translation obligation at national phase entry
Where the applicant amended the claims under Article 19 during the international phase, or made Article 34 amendments annexed to the International Preliminary Examination Report, Rule 20(5) requires the applicant to include translations of those amendments in the verified translation filed at national phase entry.
Rule 20(6) sets a distinct consequence for failure on this front. If the applicant fails to file a translation of the amended claims and annexures referred to in sub-rule (5), “even after invitation from the appropriate office to do so, within a time limit as may be fixed by that office having regard to the time left for meeting the requirements”, the amended claims and annexures “shall be disregarded in the course of further processing the application”. The application itself is not withdrawn. What is lost is the benefit of the amendments; the application proceeds on the claims as originally filed.
This is a softer consequence than the Rule 22 withdrawal for the main translation, but it should not be read as a lower priority obligation. Article 19 and Article 34 amendments are frequently the reason applicants moved to Chapter II in the first place. Losing them at the Indian entry stage means the national examination begins on unamended claims, which typically means starting from the same claim set the ISA already commented on unfavourably. Our discussion of Article 19 and Article 34 amendments in the international phase and our note on amendments after national phase entry cover the strategic context for these amendments.
Priority document translation: a separate requirement with a three-month safety valve
The priority document obligation is governed by Rule 21, and it operates on a different consequence scheme from Rule 20. Rule 21(1) provides that where the applicant has not complied with paragraphs (a), (b), or (b-bis) of Rule 17.1 of the PCT Regulations during the international phase, the priority document must be filed with the Indian Patent Office before the expiration of the 31-month time limit under Rule 20(4).
Rule 21(2) then extends the translation formality to the priority document: where PCT Rule 51bis.1(e)(i) or (ii) applies, meaning the validity of the priority claim is relevant to the patentability determination and the priority document is not in English, “an English translation thereof duly verified by the applicant or the person duly authorised by him shall be filed within the time limit specified in sub-rule (4) of rule 20”.
Rule 21(3) supplies the invitation mechanism and the softer consequence. Where the applicant has not complied with Rule 21(1) or Rule 21(2), the Patent Office “shall invite the applicant to file the priority document or the translation thereof, as the case may be, within three months from the date of such invitation”, and if the applicant fails to comply, “the claim of the applicant for the priority shall be disregarded for the purposes of the Act”. The application is not deemed withdrawn. The priority claim falls away.
Two practical notes for foreign counsel. First, the Manual at section 07.03.02 item 9 confirms that where PCT/IB/304 (the IB’s notification of receipt of the priority document) is available on WIPO’s website, the Indian Patent Office does not require separate submission of the priority document. Where the priority document was submitted via the WIPO Digital Access Service, the applicant provides the DAS access code. This substantially reduces the volume of Rule 21 invitations issued in practice. Second, note that Rule 137(2)(c) also carves Rule 21 out of the Controller’s general irregularity-correction power, so the three-month invitation window under Rule 21(3) is itself the operative safety valve; there is no further extension mechanism.
| Callout: three parallel translation obligations. |
| A single Indian national phase filing can carry up to three distinct translation obligations, each with its own trigger, deadline, and consequence: the main application translation under Rule 20(3)(b) (hard 31-month deadline, application-withdrawal consequence); any Article 19 or Article 34 amendments under Rule 20(5)/(6) (invitation-based, amendments-disregarded consequence); and the priority document translation under Rule 21(2) (three-month invitation, priority-lost consequence). Treating them as one obligation misreads the consequence structure. |
Consequences of non-compliance: what fails, what survives
Foreign counsel weighing the risk profile at national phase entry benefit from seeing the three consequence tracks side by side:
| Obligation missed | Governing provision | Consequence | Application status |
| Main verified English translation of the application (description, claims, drawings text, abstract) | Rule 20(3)(b) read with Rule 22 | Application deemed withdrawn | Lost |
| Translation of Article 19 amended claims or Article 34 amendments after office invitation | Rule 20(5) read with Rule 20(6) | Amendments disregarded; national examination proceeds on original claims | Survives |
| Priority document or its verified English translation within three months of office invitation | Rule 21(1)/(2) read with Rule 21(3) | Priority claim disregarded for purposes of the Act | Survives, at the international filing date |
The third row deserves a practitioner note. “Application survives” reads reassuringly, but the loss of priority can be equivalent to loss of novelty protection where the intervening disclosures matter. The right question is not whether the application survives but whether the surviving application is worth prosecuting. Our note on national phase entry fees in India sets out the cost context for that judgment.
Translation compliance checklist before entering India’s national phase
Before instructing an Indian agent to file the national phase application, foreign counsel should confirm:
- Language of filing. Was the international application filed in English or Hindi? If yes, no Rule 20(3)(b) translation is required.
- Language of publication. If the application was filed in a non-English, non-Hindi language, was the international publication issued in English? If yes, no Rule 20(3)(b) translation is required.
- Scope of translation. If a translation is required, has the vendor covered the description, claims as filed, text matter of drawings, and abstract? Are Article 19 amended claims (with any Article 19 statement) or Article 34 amendments annexed to the IPER included where applicable?
- Verification formality. Is the translation accompanied by a signed verification by the applicant or a duly authorised person that the contents are correct and complete?
- Priority document. Is PCT/IB/304 available on WIPO’s website, or was the priority document submitted via WIPO DAS with an access code? If neither, is the priority document (and its verified English translation, where required) ready to file before the same deadline?
- Deadline calculation. Has the 31-month deadline from the PCT priority date been diarised, with no reliance on Rule 137 or Rule 138 to save a missed date?
The WIPO PCT Applicant’s Guide National Chapter for India restates these positions from the WIPO side and provides the office identifiers and current fee currency conversions used at national phase entry. Our note on PCT filing procedure and strategy from India covers the international-phase decisions that shape what an applicant later files at national phase. For inbound national phase work where any of these items is uncertain, our patent team supports foreign counsel in verifying the compliance position and executing the filing within the Rule 20(4)(i) window.
Frequently asked questions
Rule 20(3)(b) requires the translation to be “duly verified by the applicant or the person duly authorised by him that the contents thereof are correct and complete.” The Rule does not prescribe the translation method. The verifier assumes responsibility for correctness and completeness, so an AI-generated draft should be reviewed by a competent translator or technical reviewer before verification.
Not systematically. PCT Rule 51bis.1(d) and the Patents Rules 2003 require verification but not certification. The Indian Patent Office may request certification by a public authority or sworn translator only where it reasonably doubts the accuracy of a translation. For most inbound national phase filings, applicant verification is sufficient.
No. Unlike some national laws that offer a two-month late-entry surcharge window, Indian law provides no equivalent. Rule 137(2)(b) removes the 31-month deadline in Rule 20(4)(i) from the Controller’s general condonation power, and in operative practice Rule 138 is not treated as reaching the deadline either. A missed 31-month deadline results in the application being deemed withdrawn under Rule 22.
Rule 22 attaches withdrawal to non-compliance with Rule 20 as a whole. An incomplete translation (for example, missing the abstract or the text matter of drawings) fails Rule 20(5), and therefore fails Rule 20. Applicants typically receive an office communication flagging the deficiency, but the safest position is to file a complete verified translation on entry.
No. Rule 21(2) requires an English translation only where PCT Rule 51bis.1(e) is applicable, which turns on the priority document being in a language other than English and the validity of the priority claim being material to the patentability determination. If the priority document is in English, this translation obligation does not arise.
No. The Manual at section 07.03.02 item 9 confirms that where PCT/IB/304 is available on WIPO’s website, the Patent Office does not require the applicant to submit the priority document separately. Where the priority document is available through WIPO DAS, the applicant provides the DAS access code, and no separate document filing is required.
Disclaimer: This article summarises Indian statutory and Registry-practice positions on translation requirements for PCT national phase entry as at July 2026. It is written for foreign counsel and applicants and is not a substitute for advice from a registered Indian patent agent on a specific matter. PCT national phase requirements can change with amendments to the Patents Rules 2003 or updates to the Manual of Patent Office Practice and Procedure; readers should verify the current position, or engage Indian counsel to do so, before filing.