Documents Required explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Chapter 3 of the Manual (03.04 to 03.04.02) lists the documents that make up a patent application and describes the Office's comprehensive e-filing system. The statutory basis is section 7 and the rules on forms; the Manual shows how the Office checks the package.
A complete filing normally contains the application in Form 1, the specification in Form 2, the foreign-application undertaking, inventorship declaration where required, proof of right, authorisation of the agent and, in some cases, a priority document. Every application is for one invention only. The Manual is the Patent Office's guidance and does not have the force of law; the Patents Act, 1970 and the Patents Rules, 2003 as now in force prevail, and Form 1 and Form 3 were substituted in 2024.
Check the current Manual on ipindia.gov.in, since the Office revises it. Anyone preparing a patent drafting and filing package should work from this list. Form numbers below are as the Manual prints them; verify each against the list of forms in the Second Schedule.
The basic filing (03.04)
The Manual says an application for a patent is for one invention only, filed in Form 1 at the appropriate office together with a provisional or complete specification in Form 2, with the prescribed fee. A provisional specification cannot be filed with a convention application or a PCT national phase application. The Manual refers to Chapter 5 for the specifications; our article on provisional specifications covers that.
On fees, the Manual describes the structure: a normal fee for an application of up to a stated number of pages and claims, additional fee beyond that, and an extra charge for physical filing. Amounts are not repeated here because the whole First Schedule was substituted in 2024; take them from the First Schedule post.
What the application should contain (03.04.01)
The Manual lists eleven items. TaxClue's table sets them against what the examiner checks.
| Document | What the Office expects | Points to watch |
|---|---|---|
| Form 1 | The application for grant, signed | Name, address and nationality of inventors |
| Proof of right | Endorsement in Form 1 or authenticated assignment, where the inventor is not the applicant | The Manual says within six months of the Indian filing date; see the rule 10 post |
| Specification (Form 2) | Provisional or complete | Signed on the last page of the claims; drawings signed at bottom right |
| Statement and undertaking on foreign applications (Form 3) | Information on corresponding foreign filings | The Manual describes filing it with the application or within a set period; Form 3 timing and the Controller's power to call for a fresh statement were changed in 2024, so read rule 12 |
| Declaration as to inventorship (Form 5) | With the complete specification after a provisional, and for convention and national phase applications | The Manual says the Controller may allow it later on a request in Form 4 |
| Form 28 | For a small entity or start-up, with evidence | Needed with every fee-bearing document, as the Manual says |
| Authorisation (Form 26) | Or a power of attorney | The Manual allows three months from filing; no action is taken on the file until it is cured. A general power already filed elsewhere can be supported by a self-attested copy |
| Priority document | For a convention application, and for a national phase application where the PCT regulation requirements are not met | The Manual says it is filed with the national phase application before the national phase period ends |
| Signatures | On every form, with name and date | Digital signature removes the need for a physical one |
| National Biodiversity Authority permission | Where Indian biological material is used | The Manual says it may be submitted any time before grant |
| Source and geographical origin | Disclosed in the specification where biological material is used | Part of the specification, not a separate form |
Two points deserve emphasis. First, the Manual's Form 3 period reflects 2019 practice; the 2024 amendment changed it, so follow rule 12 and the Second Schedule. Second, the Manual says the applicant must keep the Controller informed of later foreign applications for the same or substantially the same invention. A convention applicant with several filings abroad should keep a running log for this.
How the e-filing system works (03.04.02)
The Manual describes the Office's e-filing portal as a platform for submitting new applications and later forms in a secure, authenticated way. The features it lists are:
- authentication by a digital signature certificate of class II or III, obtained from an authorised vendor;
- online payment through a payment gateway, with the usual modes such as net banking, cards and UPI;
- availability at any hour, including holidays;
- drafting of forms, upload of PDF documents, saving drafts, signing and payment, and then an acknowledgement receipt.
After payment the submitted forms go to the respective section of the Office for processing. The Manual itself says the portal steps change and refers readers to the portal for updated information, so use the portal's current instructions rather than any printed sequence.
The patent filing professional's checklist for e-filing is simple: a valid digital signature certificate, PDFs in the format the portal accepts, the form signed before payment, and the receipt saved. Subsequent forms (for example Form 4 or Form 6) go through the same system, which is what the Manual means by saying subsequent filing is integrated.
Common objections at this stage
- Missing proof of right. Raised where an applicant company has no assignment from the inventors. Answer by filing the assignment or the Form 1 endorsement, or by a petition for extension if the period has gone.
- No authorisation for the agent. The Office will not process the file further until Form 26 is on record.
- Form 5 missing. Raised when a complete specification follows a provisional or in a convention or national phase case.
- Form 28 missing for a small entity or start-up. The fee scale cannot be applied without it.
- Biological material from India. The Office looks for the source and geographical origin and, before grant, the National Biodiversity Authority permission.
For the extension and condonation routes on Form 4, see rule 138, which now governs.
Worked example
Kaveri Instruments LLP, a registered small entity, files an ordinary application for a sensor. The LLP's agent files Form 1, Form 2 with a complete specification, Form 3, Form 28 with the registration evidence, Form 26 and the digitally signed forms, then pays through the gateway. The Office finds no inventor assignment on the file because the inventor is an employee. The agent files the assignment, and the objection closes.
Need help with the filing package?
If you want the forms, the specification and the proof of right reviewed before they go on the portal, our patent drafting and filing team can prepare and file them in order.
Key takeaways
- One application, one invention; Form 1 with Form 2 and the fee.
- Proof of right, Form 5, Form 26 and Form 28 are the items most often missing.
- Form 3 timing in the Manual is older than the 2024 amendment; rule 12 now prevails.
- Fees come from the First Schedule as now in force, not from the Manual.
- E-filing needs a class II or III digital signature certificate.
Read next
- Chapter 3: who may apply and the types of application
- Chapter 3: leaving and serving documents, language, sequence listing and fee heads
- Form 1: how to file the application for grant of a patent
- Rules 8 and 9: forms and filing of documents
Disclaimer: Based on the manuals and guidelines published by the Office of the Controller General of Patents, Designs and Trade Marks that are named in the article, as consulted on 4 October 2026. They are guidance and do not have the force of law; the Patents Act, 1970 and the Patents Rules, 2003 as amended (including the 2024 amendment rules) prevail, and the current versions on ipindia.gov.in should be checked. This article is general information, not legal advice; check the official text before acting.