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Patent criticality
The provisional that covered nothing
Is a cheap provisional filing better than nothing?
A provisional specification buys a date for the subject matter it actually describes. A two-page document that states the idea without explaining how it works buys a date for almost nothing - while creating a strong and false sense that the invention is protected.
What a provisional has to contain to be worth filing
Enough technical detail that a skilled person could understand and perform the invention. It does not need claims. It does need the mechanism, the parameters, the alternatives and, where the invention depends on an effect, some indication of the evidence for that effect.
A provisional that says a system that uses machine learning to optimise routing gives you a date on a sentence. The competitor who publishes a working method in month four is prior art against everything you add later.
The twelve months are not a pause
A complete specification must follow within twelve months or the application is treated as abandoned. Anything added at that point takes the later date. So the twelve months are for generating data and embodiments that you will then have to describe - not for waiting.
Sections 9 and 11 of the Patents Act 1970.
Write the provisional as though it were the complete specification, minus the claims. If that feels like too much work to do now, the invention may not be ready to file.
Filing a provisional to claim the date, intending to write it properly later.
Provisionals under five pages for anything mechanical or chemical.
Read your provisional and underline everything a competent engineer could actually build from it. That underlined part is what you own.
Sources & further reading
- The Patents Act, 1970 (consolidated to 1 August 2024) — Official IP India text
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A provisional specification protects everything I later develop.
A provisional secures a date only for the subject matter it actually discloses. Anything added in the complete specification gets the later date.
Thinking about filing?
Before anything is drafted, the useful work is establishing what is already public, what is genuinely yours, and what you can honestly claim.
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.