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The divisional you could no longer file
When is the last moment to file a divisional in India?
A divisional application must be filed before the parent is granted. That is a moving target you do not control - and it is the single most common way that valuable subject matter is lost from a family.
The rule and the two 2023-2024 changes
Section 16 permits a further application at any time before the grant of the parent, in respect of an invention disclosed in the provisional or complete specification already filed. The divisional keeps the parent's date, and its complete specification must not include matter not in substance disclosed in the parent.
In October 2023 a Division Bench of the Delhi High Court held that the plurality of inventions justifying a divisional is judged on the disclosure, not the claims, and that there is no distinction between a divisional filed voluntarily and one filed to meet an objection. That overruled an earlier decision to the contrary.
In March 2024, rule 13(2A) expressly permitted a further application in respect of an invention disclosed in an earlier further application.
How the deadline is missed
An allowance arrives sooner than expected. Or the applicant defers the decision pending a commercial review that takes three months. Or nobody realises that the parent covers subject matter which was described but never claimed - and which is exactly what a competitor is now selling.
Section 16 of the Patents Act 1970; rule 13(2A) of the Patents Rules 2003, inserted 2024.
Syngenta Ltd v Controller of Patents and Designs, Delhi High Court (Division Bench), 13 October 2023.
Review divisional options at the time of the FER reply, not at allowance.
Believing that subject matter described but not claimed in the parent cannot support a divisional. On current Indian authority it can.
Any specification that describes more than it claims.
For each pending case, list what the specification discloses that the claims do not cover. That is your divisional inventory.
Sources & further reading
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Not sure whether this applies to your invention?
The honest answer usually needs someone to look at your actual disclosure, your timeline and the prior art. That is a conversation, not an article.
Educational guidance, not legal advice. This material is published by Ragulika IP for general education and information. It is not legal advice, it does not create a professional-client relationship, and it is not a substitute for advice on your own facts. Patentability, infringement, prosecution strategy and every other IP outcome turn on the specific facts and on the law and Patent Office practice as they stand at the time you act. Please take professional advice before making a decision, and read the underlying provision or judgment before relying on any point stated here.
Last reviewed by Ragulika IP on 2026-08-23. Indian patent law and Patent Office practice change; check the position before you rely on it.