The Patent Litigation Roadmap
Patent infringement lawsuits are among the most technically and legally complex cases in the federal court system. Knowing what to expect at each stage reduces surprises and helps you make better strategic decisions.
Step 1: Pre-Suit Investigation
Before filing, your attorney will map each element of your patent claims to the accused product or process. This "claim chart" is the backbone of the entire case. Counsel will also check the defendant's products, patent file history, and any relevant prior art. Sending a cease-and-desist letter or opening licensing talks is common at this stage.
Step 2: Filing the Complaint
Patent cases must be filed in federal district court. The complaint identifies the patent, the accused product, and the relief sought (damages and/or injunction). Since the America Invents Act, plaintiffs generally cannot sue multiple unrelated defendants in the same action.
Step 3: Inter Partes Review (IPR) and PTAB
Shortly after suit is filed, defendants often petition the Patent Trial and Appeal Board (PTAB) for IPR, arguing the patent is invalid over prior art. IPR proceedings run parallel to district court litigation and can stay the lawsuit for 12–18 months. Surviving IPR dramatically strengthens settlement leverage.
Step 4: Claim Construction (Markman Hearing)
The court interprets the meaning of disputed claim terms. This Markman ruling is often the single most important event in the case—a narrow construction can gut a plaintiff's case, while a broad one can make defense nearly impossible. Many cases settle immediately after this ruling.
Step 5: Discovery
Both sides exchange technical documents, source code, financial records, and depositions. Discovery in patent cases is expensive and can span 12–18 months. Electronic discovery of engineering documents and sales data is especially burdensome.
Step 6: Summary Judgment
Either party may move for summary judgment on infringement, validity, or damages. Courts grant these motions frequently in patent cases, particularly on obviousness and claim construction grounds.
Step 7: Trial
Patent trials are typically jury trials lasting 5–10 days. Jurors decide infringement and damages; judges rule on equitable defenses like inequitable conduct. Verdicts can reach tens of millions of dollars, but post-trial motions and appeals routinely reduce or reverse them.
Step 8: Settlement—Which Usually Happens Before Trial
Over 95% of patent cases resolve before trial, typically through a lump-sum settlement plus a license or covenant not to sue. Settlement talks intensify after Markman and again on the eve of trial.
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Discuss your case with Yates Anderson
Yates Anderson represents clients in Alabama, Florida, and beyond. Our attorneys handle complex disputes with the rigor of a national firm and the agility of a boutique. Request a case evaluation and an attorney will respond within one business day.
Frequently asked questions
Which federal courts are most common for patent cases?
The District of Delaware and the Western District of Texas (Waco Division) handle the largest volume of patent cases nationally. Delaware is favored for suits against incorporated companies; the Western District of Texas has developed a reputation for swift scheduling orders.
What is an injunction in a patent case?
An injunction is a court order requiring the defendant to stop making, using, or selling the infringing product. Since eBay v. MercExchange (2006), courts apply a four-factor test; practicing patent owners have a stronger case for injunctive relief than non-practicing entities.
How much does it cost to file a patent infringement lawsuit?
Litigation through trial typically costs $3–5 million per side. However, many patent attorneys offer contingency arrangements for strong cases, and early settlement can reduce total costs to under $500,000.