PCT National Phase Entry into India: Procedure, Deadlines and Strategy

The Patent Cooperation Treaty (PCT) is the dominant route for international patent filings. A single international application filed under the PCT preserves filing rights in 150+ contracting states, including India. Applicants then have a deadline — 31 months from the priority date in India — to enter the Indian national phase by filing the appropriate forms with the Indian Patent Office. The window, the requirements, and the divergences from foreign practice make Indian national-phase entry one of the most procedurally distinctive parts of cross-border patent practice.

This guide covers the timing, the forms, the documents, the language requirements, the priority-document handling, and the strategic considerations for applicants entering India through the PCT.

The 31-month deadline

Rule 20 of the Patents Rules, 2003 fixes the national-phase entry deadline at 31 months from the priority date. The deadline is computed from the earliest claimed priority date, not from the international filing date. Most PCT contracting states have a 30-month deadline; India's 31-month window provides a single additional month of flexibility, but applicants should not rely on it routinely — the additional month is sometimes the difference between a successful filing and a lost right.

There is no extension of the 31-month deadline. Restoration of rights under Section 21 read with Rule 17B of the Patents Rules is available for missed deadlines in narrow circumstances — typically requiring evidence that the delay was unintentional or that all due care was exercised — but the test is strict and restoration is not granted as a matter of course. Applicants should treat the 31-month deadline as final.

Thirty-one months. Not a goal; a hard deadline.

The forms and fees

National-phase entry requires the following filings:

• Form 1 — Application for Grant of Patent. Identifies the applicant, the inventor, the title, the priority claim, the PCT international application number
• Form 2 — Provisional or Complete Specification. The PCT specification (description, claims, drawings, abstract) is normally adopted as the Indian specification, with any amendments made under Article 19 or Article 34 of the PCT
• Form 3 — Declaration of information about foreign filings under Section 8 of the Patents Act. This is one of the most under-attended forms; missing or inaccurate Form 3 filings have grounded successful revocation petitions later
• Form 5 — Declaration of inventorship
• Form 26 — Power of attorney if the applicant is represented by an Indian patent agent

Government fees as of 2026 (verify the current Patents Rules schedule): for an individual or startup applicant, the official filing fee is roughly ₹1,750 plus ₹350 per claim above 10 and ₹350 per page above 30. For a 'natural person/MSME/startup' filer the multipliers are reduced; for large applicants they are higher.

Language and translation requirements

The Indian application must be filed in English or Hindi. PCT applications filed in other languages — German, French, Japanese, Chinese, Korean — require a certified English translation of the specification, claims, drawings and abstract at national-phase entry. Translation accuracy is critical: claim-language disputes in later prosecution have turned on translation choices made at this stage.

The translation does not need to be done by the Indian patent agent. It can be done abroad and certified. But Indian patent agents typically review the translation against the original to flag claim-language risks before filing.

Section 8 disclosures — the under-attended form

Section 8 of the Patents Act requires the applicant to disclose, at filing and continuously thereafter, the status of corresponding applications in other jurisdictions. Form 3 is the vehicle. The disclosure must include:

• Country, application number and filing date of each foreign filing
• Status — pending, granted, refused, withdrawn, abandoned
• Updates as foreign status changes — Section 8(2) imposes a continuing duty

Failure to file or update Form 3 is one of the grounds for revocation under Section 64(1)(h). Multiple Indian patents have been revoked on Section 8 non-compliance alone, even where the substantive merits were strong. The duty continues until grant; some practitioners maintain a Section 8 file post-grant as a precaution.

Request for examination

Filing the national-phase application does not start examination. A separate Request for Examination in Form 18 must be filed within 31 months from the priority date — typically alongside the national-phase entry — to put the application into the examination queue. Without Form 18, the application sits dormant and is eventually deemed withdrawn.

Examination then takes 12-30 months on average, depending on the technology area and the office's caseload. The applicant receives a First Examination Report (FER) and has six months (extendable to nine) to respond. The PCT International Search Report and Written Opinion are typically considered by the Indian examiner but do not bind the Indian outcome.

Common pitfalls

Frequent issues that surface in national-phase practice:

• Late entry — missing the 31-month deadline. Restoration is hard and not guaranteed
• Translation discrepancies — claim-language differences between PCT publication and Indian translation that produce examination objections or, worse, narrower granted claims
• Section 3(d) and 3(k) exclusions — pharma and software applications that survived the EPO or USPTO examination but draw substantive objections in India
• Incomplete Form 3 — missing foreign filings, particularly continuations and divisional applications filed after the original priority date
• Request for Examination not filed — application sits indefinitely

Strategic considerations

Several strategic choices at national-phase entry shape the prosecution outcome:

• Claim amendment at entry. Article 19 and 34 amendments made during the PCT international phase carry into Indian prosecution. Significant claim restructuring is more flexible at entry than later
• Divisional filings. Foreign-origin applications with broad claim sets can be split into divisionals at entry to manage individual examination tracks and 3(d)/3(k) exposures separately
• Expedited examination. Under the Patent Prosecution Highway (PPH) arrangement with several offices and the expedited-examination provisions for startups and MSMEs, faster grant is available where the PCT outcome was favourable

The takeaway

Indian national-phase entry through the PCT is procedurally well-defined but unforgiving on timing. The 31-month deadline, the Section 8 continuing duty, and the Form 18 examination request together account for most of the failures of foreign-origin Indian patent applications. Applicants who manage these correctly — and who plan for the substantive divergences from EPO/USPTO practice on Sections 3(d), 3(k), and 3(j) — generally see Indian prosecution outcomes consistent with their international portfolios. IPForte's PCT and national-phase practice handles entry, Form 8 protocols, examination response and any necessary divisional filings.