If you’re prosecuting the same invention abroad and in India, Section 8 makes you keep the Indian Patent Office informed — through Form 3. Miss it, and you hand an opponent a ground to oppose or even revoke your patent.
Note: The 2024 Patents Rules eased the Form 3 burden. Form 3 is now generally required twice — with the Indian application, or within six months of the Indian filing date, and again within three months of the First Examination Report. Controllers must also use accessible databases themselves, though they may still call for a fresh Form 3 in specific circumstances. This piece reflects the current position.
What Section 8 requires — and why
Section 8 of the Patents Act, 1970 obliges an applicant who is also prosecuting the same or substantially the same invention outside India to disclose details of the corresponding foreign applications from time to time. It was added on the Ayyangar Committee’s recommendation, so that Indian examiners stay aware of how the corresponding applications are faring elsewhere.
A common objection is that the Ayyangar Report is from the 1960s and everything is now on the internet anyway. The IPAB rejected that in 2013, memorably:
“For good reasons S.8 is there. The Controllers cannot ignore it and condone the breach… Tough for Inventors it may be, but S.8 must be complied with. When George Mallory was asked ‘Why do you want to climb Mount Everest?’, he is supposed to have replied, ‘Because it is there.’ To the question ‘Why should we comply with S.8?’ The Answer is ‘Because it is there.’”
What is Form 3?
Form 3 is the applicant’s statement and undertaking about the same or substantially the same corresponding applications filed outside India. The first one is filed with the Indian application, or within six months of the Indian filing date — for a national phase entry, six months from the date the application actually enters India. Under the old regime a foreign application filed after that triggered a fresh Form 3 within six months of that filing; since 2024 those updates are consolidated into one, due within three months of the first examination report. The Controller can also require details at any time between filing and grant or refusal.
What details go in
The point is to keep the Office informed of developments. The online filing system captures the status, publication and grant details of each corresponding application. Neither Section 8 nor Rule 12 expressly requires hard copies of foreign office actions, and the online system does not ask you to upload the documents themselves.
How often to file — the current position
- Section 8(1): Form 3 is now required essentially twice — with the Indian filing (or within six months), and then within three months of the FER.
- Section 8(2): Controllers must use accessible databases to check corresponding-application information; applicants may still be asked for a fresh Form 3 within two months in specific situations.
Consequences of non-compliance
Non-compliance with Section 8 is a ground for both opposition and revocation — covering both non-disclosure of foreign-application status and disclosure of information false to the person’s knowledge.
The case usually cited is Chemtura v. Union of India, where the Delhi High Court vacated an interim injunction the patentee had obtained, because it had not kept the Controller informed and had not furnished details when asked. The patent itself was not revoked and remained on the register — but the patentee lost the relief it had come to court for, which in practice is what the suit was about. Later decisions have held that revocation for a Section 8 lapse is discretionary rather than automatic; see our note on the High Court’s clarification.
Keeping Form 3 current can feel cumbersome — especially for corporates filing many corresponding applications across countries. But a procedural lapse should never sink a hard-won patent, so compliance is the safer course.
The takeaways
- Diarise both Form 3 deadlines — at filing/within six months, and within three months of the FER.
- Disclose status, publication and grant of every corresponding foreign application.
- Section 8 non-compliance has real consequences — it cost the patentee its injunction in Chemtura, and it remains a ground of revocation.
- The 2024 Rules lightened, not removed, the duty — treat it as a live obligation.
Frequently asked questions
What is Form 3 in Indian patent practice? It is the statement, under Section 8, disclosing corresponding foreign applications for the same or substantially the same invention to the Indian Patent Office.
When must Form 3 be filed? With the Indian application, or within six months of the Indian filing date, and again within three months of the first examination report under the current Rules. If the Controller asks for an updated Form 3, it is due within two months of that communication.
What happens if I don’t comply with Section 8? It is a ground for opposition and for revocation, and it can cost you interim relief: in Chemtura v. Union of India the Delhi High Court vacated the patentee’s injunction over a Section 8 lapse, though the patent itself was not revoked. Later decisions treat revocation on this ground as discretionary rather than automatic.
Do I have to upload foreign office actions? The provisions don’t expressly require it and the online system doesn’t demand the documents themselves — but the Controller can call for details at any time.
Useful official resources
- The Patents Act, 1970
- Indian Patent Office — patents