Patent Litigation Timeline

A patent infringement lawsuit proceeds through distinct phases over 2-4 years: PHASE 1 — PLEADING (Months 1–3): plaintiff files complaint in federal district court; complaint identifies asserted patents, accused products, and claims asserted; defendant responds within 21 days (or extension) with answer + affirmative defenses; defendant may file 12(b)(6) motion to dismiss (for pleading deficiencies) or 12(b)(3) motion for improper venue (TC Heartland); counterclaims: defendant often counterclaims for declaratory judgment of non-infringement and invalidity; IPR STRATEGY: defendant must decide whether to file IPR petition within 1 year of complaint service; PHASE 2 — SCHEDULING ORDER AND PRELIMINARY INJUNCTION (Months 2–6): court issues scheduling order setting all major deadlines; preliminary injunction (rarely granted in patent cases post-eBay) may be filed early if infringement is clear and ongoing harm is proven; PHASE 3 — FACT DISCOVERY (Months 3–18): written discovery (interrogatories, requests for production); document production (often large — millions of documents in major cases); depositions of fact witnesses; third-party subpoenas (customers, suppliers, prior art witnesses); PHASE 4 — CLAIM CONSTRUCTION (MARKMAN) (Months 12–20): parties brief disputed claim terms; Markman hearing before the judge; court issues claim construction order; Markman order often drives settlement — if claims are construed narrowly, infringement may disappear; if broadly, validity concerns emerge; PHASE 5 — EXPERT DISCOVERY (Months 18–30): parties designate technical and damages experts; expert reports (opening + rebuttal); expert depositions; PHASE 6 — DISPOSITIVE MOTIONS (Months 24–36): motions for summary judgment on non-infringement, invalidity, or damages; Daubert motions to exclude expert testimony; PHASE 7 — TRIAL (Months 30–42): jury trial typically 1–2 weeks; damages award + willfulness determination; PHASE 8 — POST-TRIAL (Months 36–48+): JMOL motions, new trial motions; appeal to Federal Circuit (adds 1–2 years).

Inter partes review (IPR) at the PTAB runs parallel to district court litigation and can significantly alter the case trajectory: TIMING: IPR must be filed within 1 year of service of a complaint alleging infringement (§ 315(b)); filing an IPR does NOT automatically stay the district court case; INSTITUTION DECISION: PTAB decides whether to institute the IPR within 3 months of filing (§ 314(c)); if not instituted, the district court case continues; if instituted, PTAB issues a final written decision (FWD) within 12 months of institution (§ 316(a)(11)); STAY OF DISTRICT COURT: the defendant can move to stay the district court litigation pending IPR; courts apply a 3-factor test: (a) stage of litigation (early = more likely stay); (b) prejudice to patent owner (unreasonable delay = against stay); (c) simplification of issues (IPR may resolve most issues); stay grants are discretionary — some districts stay readily; others rarely; FINTIV FACTORS: the PTAB itself may deny institution (discretion) if the district court trial date is near (NHK-Fintiv analysis); a trial scheduled within ~7 months of the IPR petition may result in PTAB denial of institution; TIMELINE IMPACT: IPR institution + stay = district court paused for 12–18 months; PTAB invalidity findings (partial or complete) dramatically change settlement dynamics; IPR resolution without stay: both tracks proceed simultaneously; ESTOPPEL: after FWD, petitioner/RPI/privies are estopped from raising grounds raised or reasonably could have been raised in IPR in district court; COST COMPARISON: district court litigation = $3M–$15M+ per side to trial; IPR = $250K–$500K per petition.

Claim construction is the court's interpretation of disputed patent claim terms — it is often the most consequential event in the litigation: LEGAL NATURE: claim construction is a question of law (Markman v. Westview Instruments, S.Ct. 1996); the judge decides it, not the jury; Federal Circuit reviews claim construction de novo (no deference to district court); PROCESS: parties exchange claim construction positions; joint claim construction statement identifies disputed terms; briefs filed identifying intrinsic evidence (claims, specification, prosecution history) and extrinsic evidence (dictionaries, expert testimony) for each term; Markman hearing: oral argument with experts sometimes presented; judge may rule from the bench or issue written opinion weeks to months later; STRATEGIC IMPORTANCE: if the court adopts a narrow claim construction, the accused product may not infringe → plaintiff loses on non-infringement summary judgment; if the court adopts a broad claim construction, the claim may be invalid over prior art → defendant moves for invalidity summary judgment; the Markman order is the single most important driver of settlement (both parties reassess their positions); APPEAL: after final judgment, the losing party can appeal claim construction to the Federal Circuit; Federal Circuit reversal rate on claim construction is historically ~30–35%; TIMING: Markman hearings typically occur 12–18 months into the case; some courts do early Markman hearings (6–9 months); PHV (patent holder venue) districts like WDTX and EDTX move fast; IDS PRACTICE: post-Markman, both parties may need to re-evaluate their expert strategies based on the court's constructions.

The vast majority of patent cases settle before trial — understanding settlement dynamics is essential to litigation strategy: SETTLEMENT RATES: approximately 90–95% of patent cases settle before trial; trials are expensive ($5M–$20M+ per side), unpredictable, and create public record of potentially embarrassing internal documents; WHEN CASES SETTLE: most common settlement points: (a) after the Markman order — both parties reassess their positions based on claim construction; (b) after summary judgment rulings — a partial win for either side changes leverage; (c) during expert disclosure — expert damages reports force both sides to quantify exposure; (d) before trial — final settlement push; (e) post-IPR FWD — invalidity findings remove claims or change royalty calculations; SETTLEMENT TRIGGERS: bad Markman ruling for plaintiff → plaintiff settles cheap; IPR institution → defendant gains leverage; large damages expert report → plaintiff has credible high number; MEDIATION: many cases go to mediation, especially post-Markman; federal judges often refer cases to mediation; SETTLEMENT STRUCTURE: typically structured as: (a) a one-time lump sum payment; OR (b) a running royalty license; plus cross-license of any defendant patents; plus covenants not to sue; non-practicing entities (NPEs) typically want cash; operating companies may prefer cross-licenses; COST OF SETTLEMENT vs. LITIGATION: settling for $500K before trial is often rational even if confident in winning — trial costs alone may exceed the settlement amount; willfulness exposure (up to 3× damages) increases settlement incentives for defendants.

Patent litigation is among the most expensive civil litigation in the US legal system: AIPLA SURVEYS (approximate, per side): cases with $1M–$25M at stake: $1.5M–$4M to trial; cases with $25M+ at stake: $5M–$15M+ to trial; PRE-DISCOVERY PHASE COSTS: complaint/answer/motions: $50K–$150K; IPR petition (if filed): $200K–$500K; FACT DISCOVERY: $500K–$2M; document review (often the largest cost component); depositions ($20K–$50K per deponent); CLAIM CONSTRUCTION BRIEFING AND HEARING: $150K–$400K; EXPERT REPORTS AND DEPOSITIONS: $500K–$2M; technical expert: $400-$800/hour; damages expert: $600–$1,000/hour; SUMMARY JUDGMENT MOTIONS: $300K–$500K per motion; TRIAL PREPARATION AND TRIAL: $1M–$3M+; CONTINGENCY FEE CASES: some patent plaintiffs (especially NPEs) use contingency-fee arrangements where counsel takes 30–50% of recovery; reduces upfront cost but limits settlement flexibility; DEFENDANT COST REDUCTION STRATEGIES: early dispositive motions (§ 101 motion to dismiss before discovery); IPR petition (cheaper than district court validity defense); early settlement (pre-discovery costs are relatively low); case venue transfer (expensive district = expensive litigation); FEE SHIFTING: exceptional cases under § 285 (Octane Fitness) can result in fee awards; risk of fee award changes settlement calculation; estimated fee exposure should be quantified when evaluating litigation strategy.