Revocation proceedings: documents to prepare
Revocation proceedings ask a court or the granting office to cancel a patent that should not have been granted. To start, a party assembles the patent file, prior art evidence, a reasoned statement of grounds, and proof of standing. The forum reviews these documents before it opens a case number and sets a first deadline.
What changes once proceedings start
Once the case is filed, the patent stays formally valid until a final decision issues. Licensing and enforcement can continue, but any new infringement claim now carries the risk that the underlying right disappears retroactively. Counterparties often pause deals that depend on the patent until the outcome is known.
Filing also fixes a clock. Once the other side is served, response windows, evidence deadlines and any hearing date all run from that point, and missing one can narrow what a party is later allowed to argue.
Documents to prepare
Every forum wants broadly the same core file, though naming and order differ. The table below lists what a claimant typically assembles before filing.
| Document | Purpose | Typically prepared by |
|---|---|---|
| Statement of grounds | Sets out why the patent should not have been granted | Patent attorney |
| Prior art file | Evidence that the claimed invention was not new or not inventive | Attorney with a technical expert |
| Standing evidence | Shows the claimant has a legitimate interest in the outcome | Claimant, confirmed by counsel |
| Patent file copy | The granted claims, description and prosecution history | Claimant or the public register |
| Power of attorney | Authorises counsel to act before the forum | Claimant |
| Fee proof | Confirms the filing fee has been paid | Claimant's office |
What to do, in order
- Confirm the patent number, current owner and status in the register; the case attorney checks this before drafting anything.
- Collect prior art and technical evidence; a technical expert works alongside the attorney to rank the strongest documents.
- Draft the statement of grounds and attach the supporting evidence; the attorney signs the final version.
- File the case with the competent forum and settle the filing fee; the claimant's office handles payment.
- Serve the filing on the patent holder within the forum's deadline; the forum registry usually manages formal service.
- Calendar the response window and any hearing date; the case attorney tracks every deadline from filing onward.
Who decides and how long it takes
The forum with jurisdiction over the granted right decides the case: a patent court, or the office that granted the patent, depending on where protection sits. A first procedural order usually follows within a few weeks of filing. A full decision on the merits can take a year or longer once evidence exchange and any hearing are scheduled.
Internally, a named case attorney stays assigned from filing to decision, coordinating with any technical expert throughout; see Who signs the work in practice.
Common forks
If the other side does not respond by the deadline, the forum can proceed on the file as it stands and rule without their input, though it will usually still check that service was valid.
If your patent underpins a product sold through a third-party platform, a revocation can trigger separate listing questions once the decision becomes public; see When a marketplace delists the collection explained.
If the patent covers several states or a bundle of national rights, each register may need a separate note once the decision is final, rather than one single update.
What this page does not cover
This page does not cover the cost of running a revocation case, nor settlement drafting or licence renegotiation once a case is underway. It also does not replace a check on the other side before resources go into a dispute that depends on the patent's validity.
Before onboarding a distributor whose deal assumes the patent will survive, a separate report covers the relevant counterparty checks; see Counterparty report before onboarding a distributor in detail.
Reviewed
This overview reflects the procedural steps used across current revocation practice. It does not name specific statutes, because forum rules and deadlines vary by patent type and by where protection was granted. Confirm current deadlines with the forum before filing.
Related publications
For urgent measures sought before a revocation case reaches a hearing, see Preliminary injunction step by step.
FAQ
How long does revocation proceedings take in practice?
A first procedural order can arrive within weeks of filing. A decision on the merits typically takes a year or longer once evidence exchange and any hearing are scheduled, and longer still if either side appeals.
Which documents are needed to start?
A claimant needs a statement of grounds, a prior art file, standing evidence, a copy of the granted patent file, a power of attorney and proof that the filing fee has been paid.
What happens if the other side does not respond?
The forum can proceed on the file as filed and decide without the other side's input, once it confirms that service was properly carried out.
Start now
If your dispute traces back to work brought in by an acquired team, that overlap often surfaces once prior art gathering begins; see When an acquired team brings prior work explained for the first steps to take before you file.