Patent Application 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.
Once an application reaches the Office, paragraphs 03.05.01 to 03.05.06 of the Manual describe what happens before an examiner reads the invention: the date and number are given, the file is digitised and classified, the formalities are checked, and the application is screened for defence and atomic energy relevance.
The Office gives each application a date and a serial number that encodes the year, the office, the type of application and a running number. A formal scrutiny then checks jurisdiction, address for service, proof of right, format, signatures and authorisation. Applications that touch defence or atomic energy are referred to the Central Government, and a secrecy direction stops publication and grant while it lasts. 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.
Check the current version of the Manual on ipindia.gov.in. For the filing package that this stage assumes, see Chapter 3 on fee heads and format.
Initial processing (03.05.01)
On receipt the Office accords a filing date and a serial number; a request for examination gets its own separate serial number. Paper filings are digitised, verified, screened, classified and uploaded, and the application and documents are arranged in an electronic wrapper. The screening looks at four things: the International Patent Classification, the technical field (so that the file goes to an examiner in that field), relevance to defence or atomic energy, and the correctness and completeness of the abstract. The Manual adds that if the abstract is not appropriate the Office amends it to give better information to third parties, taking care that the amendment does not change the nature of the invention.
Practical effect, and a reason why patent drafting and filing should be done with the screen in mind: write the abstract and the title so that the Office has nothing to correct, and file in the right technical field so the file reaches the right examiner. A wrongly described field can lengthen the wait for the first examination report.
How the numbers are built (03.05.02 and 03.05.03)
The application number follows a fixed format: four digits for the year of filing, one digit for the office, one digit for the type of application and a six-digit running serial number common to all offices. The office digit identifies Delhi, Mumbai, Kolkata or Chennai. The type digit distinguishes ordinary, convention and PCT national phase applications and, within each, divisional applications and patents of addition. The Manual's two examples show how a Delhi ordinary application and a Mumbai convention application are numbered.
Request numbers use a similar format, with a prefix letter for a request for examination under rule 24B(1)(i) and another for a request for expedited examination under rule 24C. Knowing the format lets you read the status of a file at a glance: the digits tell you which office and what type, which helps when a divisional or a national phase file is searched on the register.
Scrutiny (03.05.04)
The Manual lists what the Office checks.
| Check | What the Office looks for | What to do if there is a defect |
|---|---|---|
| Jurisdiction | Filed at the appropriate office | The Office may allocate the file |
| Address for service | Complete, including e-mail address and PIN code | The Manual says an incomplete address leads to the application being returned |
| Proof of right | On file with the application or within the period the Manual states | Otherwise a petition under rule 137 or 138 is needed |
| Prescribed format | Forms, requests, petitions, deeds, translations in order | Correct and re-file the document |
| Paper, font and spacing | As the format rules require | Re-file in format |
| Signatures | Applicant or authorised agent has signed | Sign and re-file |
| Abstract and drawings | Filed in proper format | Re-file |
| Claims | A complete specification contains meaningful claims | Amend within the Act and Rules |
| Authorisation | Form 26 or a power of attorney within the period the Manual states | No action until supplied |
| Form 5 | Filed where required | File it, with Form 4 if time is sought |
| Assignment | If the invention was assigned, Form 6 with the deed | Where the right passes from an individual to a legal entity, the entity pays the balance fees |
For the extension routes the Manual refers to as rules 137 and 138, the position as now in force is in the rule 138 post; it prevails over the Manual's description, which dates from before the 2024 amendment.
Secrecy directions (03.05.05)
The Manual restates sections 35 to 38 in the following practical terms. If the Controller thinks the invention is relevant to defence, whether because it falls in a subject notified by the Central Government or otherwise, the Controller issues directions prohibiting publication and tells the applicant, then refers the matter to the Central Government to consider whether publication would prejudice the defence of India.
The Central Government reviews the directions at intervals the Manual gives, and also on the applicant's request if the Controller finds it reasonable. If it concludes publication would no longer prejudice defence, it notifies the Controller, who revokes the direction and tells the applicant. For a foreign applicant whose application has been published abroad, the Central Government can give notice to revoke. The Manual says the result of every reconsideration is communicated to the applicant within the period it states from the Controller's receipt of the notice. The Government may also, at any time before grant, notify the Controller of an invention that was not initially treated as defence-relevant, and the Controller then invokes section 35.
While a direction is in force:
- the Controller does not decide on grant or refusal;
- the application may proceed to the stage of being in order for grant, but is not published and no patent is granted;
- no appeal lies from the Controller's orders in this respect;
- if the application is found in order during the direction, Government use is governed by sections 100, 101 and 103 as if a patent had been granted, and the Central Government may pay an amount by way of solatium for hardship; and
- if a patent is later granted, no renewal fee is payable for the period the direction was in force.
Our posts on sections 35 and 36, sections 37 and 38 and rules 71 and 72 give the statutory detail.
Atomic energy (03.05.06)
Section 4 bars a patent for an invention relating to atomic energy within section 20(1) of the Atomic Energy Act, 1962. The Manual explains that atomic energy there means energy released from atomic nuclei by any process, including fission and fusion, and refers to the list of prescribed substances notified by the Central Government (it cites a notification of 28 April 2016; check for later notifications). On screening, an application that falls within that Act is referred to the Central Government, whose direction is final and is communicated to the applicant, and its opinion is not open to appeal. See section 4 and atomic energy.
Worked example
Vajra Dynamics, a Hyderabad start-up, files an application for a propulsion component. The classification screen shows possible defence relevance, so the Controller issues a direction and refers the file to the Central Government. The application proceeds to examination but is not published at 18 months. The applicant later asks for reconsideration; the Controller finds the request reasonable and asks the Central Government to review it.
Need help with a new filing?
If your invention may touch defence or atomic energy, or you want the formalities checked before the Office scrutinises them, our patent drafting and filing team can plan the filing, including the foreign filing permission question.
Key takeaways
- The application number encodes year, office, type and a running serial number.
- Scrutiny checks jurisdiction, address for service, proof of right, format, signature and authorisation.
- A secrecy direction stops publication and grant while it lasts; no appeal lies from the Controller's orders in that respect.
- Atomic energy inventions are referred to the Central Government, whose view is final.
- The Act and Rules as now in force prevail over the Manual.
Read next
- Chapter 3: leaving and serving documents, language, sequence listing and fee heads
- Chapters 3 and 4: withdrawal, publication and early publication
- Sections 35 and 36: secrecy directions for defence inventions
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.