How long does a patent lawsuit take?
A patent lawsuit in U.S. federal court typically takes about 7 months from filing to resolution. Most resolve between 4 months and 2.8 years, though about 1 in 10 run longer. Around 52% thrown out. Based on 46,705 real federal cases.
What happens after you file a patent lawsuit
A typical path from filing to the end. Most patent lawsuit cases settle before reaching trial — timing varies case to case.
How patent lawsuit cases end
What actually happened in 43,613 resolved cases — the record, not a prediction of who's right.
What makes a patent lawsuit faster or slower
- Whether it settles or ends early. Cases that settle typically run 10 months because settlement usually follows discovery; cases thrown out early end sooner (~5 months).
- Which court hears it. Among the busiest courts, the median ranges from about 4 months (S.D. Fla.) to 10 months (E.D. Va.).
- How hard it's fought. More motions, more depositions, and appeals push a case toward the slow end of the range.
Patent litigation timelines by court
Median time to resolution in the courts with the most patent lawsuit cases.
| Court | Cases | Typical | If it drags on |
|---|---|---|---|
| E.D. Tex. | 11,542 | 7 months | 2.1 years |
| W.D. Tex. | 4,628 | 8 months | 2.8 years |
| C.D. Cal. | 2,779 | 6 months | 2.0 years |
| N.D. Ill. | 2,512 | 5 months | 1.8 years |
| D.N.J. | 2,139 | 9 months | 3.0 years |
| N.D. Cal. | 1,636 | 7 months | 3.3 years |
| S.D.N.Y. | 1,238 | 5 months | 2.2 years |
| S.D. Fla. | 920 | 4 months | 1.4 years |
| N.D. Tex. | 876 | 5 months | 1.7 years |
| M.D. Fla. | 625 | 6 months | 1.8 years |
| E.D. Va. | 599 | 10 months | 10.1 years |
| S.D. Cal. | 594 | 8 months | 2.5 years |
See the timeline for your patent lawsuit
These are averages across every patent lawsuit. For a timeline tuned to your case — your court, your details — get a free estimate in about two minutes, or the full report built from your complaint.
How we know this
These numbers come from the Federal Judicial Center's public record of 9.1 million federal cases — the actual filing and resolution dates, not estimates. Tertius's model is graded on cases it never saw during training, and that error record is published in full. Every figure on this page is observed history for U.S. federal civil cases.
Common questions
Will this tell me if I'll win my patent lawsuit?
No — and anything that claims to is guessing. Tertius forecasts timing and how cases like yours tend to end. It doesn't predict who wins or what a case is worth.
Is this legal advice?
No. It's information drawn from public federal court records. It doesn't replace your lawyer — it gives you a realistic timeline to plan around.
Does this cover state court?
Not yet. These numbers are U.S. federal cases — the kind filed in “United States District Court.” Many everyday disputes are state cases, which run on different clocks; state coverage is on our roadmap.
Why do some patent lawsuit cases take so much longer than others?
Mostly discovery and whether the case settles or fights on. Cases that settle usually do so after evidence is exchanged, so they run longer than cases dismissed early — which is why the range is wide.
Other kinds of cases
Tertius, "How long does a patent lawsuit take? Federal court timelines" (2026). Analysis of Federal Judicial Center Integrated Data Base records, 9.1M U.S. federal civil cases. https://usetertius.com/how-long-does-a-patent-lawsuit-take
Free to cite with attribution — a link back to this page lets readers verify the numbers.
Source: Federal Judicial Center Integrated Database, cleaned by Tertius · model tertius-acta-6. Durations are filing to termination for U.S. federal civil cases. This is observed historical data, not a prediction of any specific case, and not legal advice. Tertius forecasts timing and disposition, never merits or damages.