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The case that reopened divisional applications
Delhi High Court (Division Bench) · 2023 · 2023:DHC:7473, decided 13 October 2023
What happened
A Single Judge hearing an appeal about a divisional application doubted an earlier Delhi High Court decision and referred the question to a larger bench. A Division Bench answered it.
What the fight was about
Whether a divisional application under section 16 requires the plurality of inventions to appear in the claims of the parent, or whether it is enough that it appears in the disclosure.
What the court decided
The earlier decision was overruled. A divisional is maintainable provided the plurality of inventions is disclosed in the provisional or complete specification - it need not appear in the parent's claims. Section 16 draws no distinction between a divisional filed voluntarily and one filed to meet a Controller's objection; in both cases plurality is tested on the disclosure. A key reason: a provisional specification need not contain claims at all, so a claims-only test would make divisionals from provisionals impossible. The maxim that what is not claimed is disclaimed does not govern section 16.
Why an inventor should care
Everything your specification describes but does not claim is potentially still protectable - but only until the parent is granted. After that it is simply published, and free for anyone to use.
What a patent professional should take from it
Review divisional options at the examination report stage, not at allowance. Keep an inventory of what each specification discloses but does not claim - that is the divisional pipeline. Note separately that rule 13(2A), inserted in 2024, expressly permits a further application based on an earlier further application.
Disclosure, not claims, decides what a divisional can cover - and grant of the parent closes the door.
Find this judgment in our case law database ›
The Division Bench decided the disclosure-versus-claims question. It did not decide whether a divisional can be filed from a divisional - that came separately from rule 13(2A) in the 2024 Rules. Do not attribute the second point to this judgment.
This is an editorial case note prepared by Ragulika IP - a summary of a decision, not the text of the judgment, and not authority. Read the judgment itself before relying on any point.
Sources & further reading
Related
Divisional application
A further application under section 16, filed in respect of an invention disclosed in the provisional or complete specification already filed, which may be filed at …
The divisional you could no longer file
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 …
The divisional that came too late
Can a divisional still be filed?
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.