Patent Opposition (Pre-grant & Post-grant)
Challenge a competitor's patent application before grant, or a granted patent within a year of grant.
Quick answer
Patent Opposition with CorpBridge costs ₹24,999 as a professional fee (plus government fee for post-grant opposition, and 18% GST) and typically takes pre-grant: after publication; post-grant: within 1 year of grant. You will mainly need patent or application number, any prior art you already know of, your product details. A qualified CA, CS or attorney prepares and files everything online, so you don't visit any office.
| Professional fee | ₹24,999 + 18% GST |
|---|---|
| Government charges | Government fee for post-grant opposition |
| Time taken | Pre-grant: after publication; post-grant: within 1 year of grant |
| Form / portal | Form 7A / 7 |
| Documents | 3 items (listed below) |
| Done | 100% online |
What is Patent Opposition?
Anyone can file a pre-grant opposition after a patent application is published and before it is granted. An interested person can file a post-grant opposition within one year of the grant being published.
We search for prior art, build the grounds and draft the opposition, then represent you in the proceedings.
What's included in our Patent Opposition service?
- Prior-art search against the patent
- Assessment of grounds under Section 25
- Drafting and filing of the opposition
- Representation in the proceedings
What documents are required for Patent Opposition?
- Patent or application number
- Any prior art you already know of
- Your product details (for freedom-to-operate context)
What is the process for Patent Opposition?
Search
We look for prior art that undermines the claims.
Draft
We prepare the opposition on the strongest grounds.
Proceed
We represent you through the hearing and decision.
How much does Patent Opposition cost?
| Component | Amount | Paid to |
|---|---|---|
| CorpBridge professional fee | ₹24,999 | CorpBridge |
| GST on professional fee | ₹4,500 | Government (via CorpBridge) |
| Government fee / stamp duty | government fee for post-grant opposition | Government, at actuals |
Your expert confirms the exact government charges for your case before you pay. Build a full package estimate →
Frequently asked questions about Patent Opposition
Who can file a pre-grant opposition?
Any person. Post-grant opposition is limited to an interested person, such as a competitor working in the same field.
What is the cost of Patent Opposition?
CorpBridge's professional fee is ₹24,999, exclusive of 18% GST, plus government fee for post-grant opposition. The exact government charges are confirmed before you pay.
How long does Patent Opposition take?
Pre-grant: after publication; post-grant: within 1 year of grant, assuming documents are complete and the authority raises no queries.
What documents are required for Patent Opposition?
Patent or application number; Any prior art you already know of; Your product details (for freedom-to-operate context).
Often taken together
Patent Search
SearchA registered patent agent searches patents and literature to tell you whether your invention is new and inventive.
Provisional Patent Application
Form 1 / 2Secure your priority date early with a provisional specification while you keep developing the invention.
Patent Drafting
Form 2Drafting of the complete specification and claims by a registered patent agent, built to survive examination.
Not sure what to protect first?
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