The procedure for obtaining a patent in India involves filing an application with the Patent Office, examination for patentability, publication, pre-grant opposition (optional), grant, and post-grant opposition. International filing is possible through the PCT route. The process is governed by S.6-46 of the Patents Act, 1970 and the Patent Rules, 2003.
Why: The examination procedure ensures that only genuine inventions (novel, non-obvious, industrially applicable, not excluded) receive patent protection. The opposition system allows third parties to challenge weak patents before and after grant, balancing the patentee's rights against public interest.
Legal Framework
| Stage | Sections |
|---|---|
| Who can apply | S.6 |
| Form of application | S.7 |
| Information about foreign applications | S.8 |
| Provisional and complete specifications | S.9-10 |
| Publication | S.11A |
| Request for examination | S.11B |
| Examination | S.12-15 |
| Pre-grant opposition | S.25(1) |
| Grant | S.43-46 |
| Post-grant opposition | S.25(2) |
Patent Filing Procedure in India
%%{init: {'theme': 'base', 'themeVariables': {
'primaryColor': '#fef9c3',
'primaryBorderColor': '#1a1a1a',
'primaryTextColor': '#1a1a1a',
'secondaryColor': '#fde047',
'secondaryBorderColor': '#1a1a1a',
'lineColor': '#1a1a1a',
'textColor': '#1a1a1a',
'fontSize': '14px',
'fontFamily': 'Space Grotesk, DM Sans, system-ui, sans-serif',
'nodeBorder': '2px',
'mainBkg': '#fef9c3',
'edgeLabelBackground': '#FFFDF7'
}}}%%
flowchart TD
A(["fa:fa-file-text File Application (S.6-7)"]):::start
A --> B["fa:fa-clock-o Provisional Spec or Complete Spec (S.9-10)"]:::process
B --> C["fa:fa-globe Publication after 18 months (S.11A)"]:::document
C --> D["fa:fa-search Request for Examination within 48 months (S.11B)"]:::process
D --> E["fa:fa-gavel Examination by Controller (S.12-15)"]:::process
E --> F{"fa:fa-question Objections?"}:::decision
F -->|Yes| G["fa:fa-exclamation-triangle First Examination Report (FER)"]:::warning
G --> H["fa:fa-users Applicant responds within 6 months"]:::process
H --> F
F -->|No/Overcome| I{"fa:fa-question Pre-grant opposition? (S.25(1))"}:::decision
I -->|Filed| J["fa:fa-gavel Opposition hearing"]:::process
J -->|Decided in favour| K
J -->|Decided against| L(("fa:fa-times Application refused")):::failure
I -->|None| K["fa:fa-check Grant of Patent (S.43)"]:::success
K --> M["fa:fa-shield Publication of grant in Gazette"]:::document
M --> N{"fa:fa-question Post-grant opposition within 12 months? (S.25(2))"}:::decision
N -->|Filed| O["fa:fa-gavel Opposition Board hearing"]:::process
N -->|None| P(("fa:fa-check Patent subsists for 20 years")):::success
classDef start fill:#d1fae5,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
classDef process fill:#fef9c3,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
classDef decision fill:#fde047,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
classDef success fill:#86efac,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
classDef failure fill:#fecaca,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
classDef document fill:#dbeafe,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
classDef warning fill:#fed7aa,stroke:#1a1a1a,stroke-width:2px,color:#1a1a1a
Step-by-Step Procedure
1. Filing (S.6-7)
| Aspect | Rule |
|---|---|
| Who can file | True and first inventor; assignee; legal representative (S.6) |
| Where to file | Appropriate Patent Office (based on applicant's residence/place of business): Delhi, Mumbai, Chennai, Kolkata |
| Forms | Form 1 (application); Form 2 (complete specification); Form 3 (statement/undertaking re foreign applications) |
| Types | Ordinary, Convention (claiming priority), PCT national phase, Patent of addition |
2. Specification (S.9-10)
| Type | Detail |
|---|---|
| Provisional specification | Describes nature of invention broadly; secures priority date; complete spec must follow within 12 months |
| Complete specification | Fully discloses invention; includes claims (defining scope of monopoly); must enable person skilled in art to work the invention (S.10(4)) |
| Claims | Define the legal scope of protection; must be clear, succinct, fairly based on matter disclosed |
| Abstract | Brief technical summary for search purposes |
3. Publication (S.11A)
Application published in Patent Office Journal after 18 months from priority date (or date of filing if no priority). Early publication available on request (S.11A(2)).
4. Request for Examination (S.11B)
Applicant (or any interested person) must request examination within 48 months from priority/filing date. Without request, application is deemed withdrawn.
5. Examination (S.12-15)
| Step | Action |
|---|---|
| Reference to examiner | Controller refers to examiner for report (S.12) |
| Examiner's report | Examines novelty, inventive step, industrial application, S.3/S.4 exclusions, sufficiency of disclosure |
| First Examination Report (FER) | Issued to applicant with objections (if any) |
| Response time | 6 months from FER to overcome objections (extendable by 3 months) |
| Hearing | If objections not resolved, hearing before Controller |
6. Pre-grant Opposition (S.25(1))
Any person may oppose after publication but before grant on grounds including:
- Prior publication/anticipation
- Prior claiming in another specification
- Prior public knowledge or use in India
- Obviousness (lack of inventive step)
- Non-patentable under S.3 or S.4
- Insufficiency of description
- Non-disclosure of information under S.8
- Convention application not filed within 12 months
- Obtained wrongfully
7. Grant (S.43-46)
If no pre-grant opposition succeeds and all objections are met, Controller grants patent and enters it in Register. Certificate of Patent issued.
8. Post-grant Opposition (S.25(2))
Any interested person may file within 12 months of publication of grant. Same grounds as pre-grant opposition. Heard by Opposition Board; Controller decides.
PCT Procedure (International Route)
| Phase | Detail |
|---|---|
| International phase | File PCT application (as described in IPL-2.4) |
| National phase entry in India | Within 31 months from priority date (Rule 20.4) |
| Filing requirements | Form 1, complete specification in English, priority document, ISR/IPER (if available) |
| Examination | Follows same process as ordinary Indian application |
| Advantage | Defers Indian filing costs by 31 months; ISR provides preliminary patentability assessment |
Illustrations
-
Publication at 18 months (why this matters strategically): BioStartup files patent on 1 January 2026. It gets published on 1 July 2027 (18 months). From that date, the ENTIRE specification is publicly available — competitors can read exactly how the invention works. This is the "disclosure" side of the bargain. BUT: BioStartup gets 20 years of exclusivity in exchange for teaching the world its invention.
Strategic implication: A company might file a patent NOT to get a grant, but to get published — thereby creating prior art that blocks competitors from patenting the same thing. Defensive patenting.
-
Pre-grant vs post-grant opposition (when to strike): GenericCo sees PharmaCo's patent application published in the Patent Journal. GenericCo has two choices:
- Pre-grant (S.25(1)): File opposition immediately. Advantage: prevents the patent from ever being born. Cheaper. GenericCo is "any person" (no need to show personal interest). Disadvantage: limited hearing; less formal.
- Post-grant (S.25(2)): Wait for grant, then oppose within 12 months. Advantage: more formal hearing before Opposition Board; stronger procedural rights. Disadvantage: patent is already in force; GenericCo must be "interested person" (must show they'd be affected).
Best strategy for generics: File pre-grant (cheap, blocks grant). If that fails, file post-grant (second bite with stronger procedure).
-
48-month examination request (the ticking clock): Company files patent on 1 March 2024. It forgets to request examination. On 1 March 2028 (48 months): application automatically deemed withdrawn. The invention becomes public (it was published at 18 months) but nobody has a patent on it. The company gave away its secret for FREE — worst possible outcome. This is why patent attorneys calendar the 48-month deadline religiously.
Recall Check
- What is the time limit for requesting examination under S.11B, and what happens if no request is filed?
- Who can file a pre-grant opposition (S.25(1)) versus a post-grant opposition (S.25(2))?
- What must a complete specification contain to satisfy S.10(4) sufficiency requirement?
Key Cases
No landmark judicial cases on pure procedure; but administrative practice is important:
Controller's Practice (2024 Guidelines on Computer-Related Inventions): Applications claiming software must demonstrate technical contribution beyond the computer programme "per se"; the examination focuses on whether claims as a whole produce a "technical effect." This illustrates how examination procedure applies S.3(k).
Roche v. Controller of Patents (IPAB, 2009): Pre-grant opposition under S.25(1) succeeded against a pharmaceutical patent on grounds of anticipation and S.3(d). Demonstrates the pre-grant opposition mechanism in action.
Distinctions
| Parameter | Pre-grant Opposition (S.25(1)) | Post-grant Opposition (S.25(2)) |
|---|---|---|
| Who can file | Any person | Any interested person (must show interest) |
| When | After publication, before grant | Within 12 months of publication of grant |
| Timing advantage | Prevents grant of weak patent | Challenges after grant (patent already in force) |
| Hearing body | Controller | Opposition Board recommends; Controller decides |
| Grounds | 11 grounds (same as post-grant) | 11 grounds (same as pre-grant) |
| Patent status during | Not yet granted | Patent in force; can be revoked |
| Appeal | To High Court | To High Court (S.117A abolished IPAB; jurisdiction transferred) |
Flashcards
Q: When is a patent application published under S.11A? A: 18 months from priority date (or filing date if no priority); early publication available on request.
Q: What is the deadline for requesting examination under S.11B? A: 48 months from priority/filing date. Failure to request examination leads to deemed withdrawal.
Q: Who can file a pre-grant opposition? A: "Any person" (no need to show specific interest; even public interest groups can oppose).
Q: What must the complete specification disclose under S.10(4)? A: The invention must be described fully and particularly, with the best method of performing it, so that a person skilled in the art can work the invention.
Q: What is the national phase entry deadline for PCT applications in India? A: 31 months from the international filing date or priority date.
Q: What is the difference between provisional and complete specification? A: Provisional spec describes the nature of invention broadly (secures priority date); complete spec fully discloses the invention with claims (defines scope of monopoly). Complete spec must be filed within 12 months of provisional.
Q: How many grounds of opposition are available under S.25? A: 11 grounds (applicable to both pre-grant and post-grant opposition), including prior art, S.3 exclusions, insufficiency, and wrongful obtaining.
Exam Scenario
BioTech Ltd. files a provisional specification on 1 March 2026 for a novel enzyme-based detergent. It files the complete specification on 15 February 2027.
(a) Is the complete specification filed within time? What is the consequence if it is not? (b) When will the application be published under S.11A? (c) By when must BioTech request examination under S.11B? (d) If a competitor believes the invention lacks novelty (published in a Japanese journal in 2025), at what stage can the competitor oppose, and on what ground? (e) If the patent is granted, what is the deadline for post-grant opposition?