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 application (or within six months of the foreign filing), 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 undertaking to keep the Patent Office updated about any same or substantially same corresponding application filed on their behalf. It is filed with the Indian application, or within six months of filing the corresponding foreign application. 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. In Chemtura v. Union of India, a court revoked a patent for the first time on Section 8 non-compliance.
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 can be fatal — it grounded a revocation in Chemtura.
- 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 corresponding foreign filing, and again within three months of the First Examination Report under the current Rules.
What happens if I don’t comply with Section 8? Non-compliance is a ground for opposition and revocation of the patent — a patent was revoked on this basis in Chemtura v. Union of India.
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