Keeping current on patent litigation means watching three layers that move at different speeds.
The statute barely moves. The case law moves continually. PTAB practice moves fastest of all.
Which is why a position learned three years ago can be wrong now without anything in the statute having changed.
Primary sources are free. Secondary summaries are useful for triage and always trail the position they describe.
The three layers
| Layer | Speed | Binds |
|---|---|---|
| Statute | Slow | Everyone |
| Federal Circuit | Continual | District courts and the PTAB |
| Supreme Court | Infrequent, high impact | Everyone |
| District courts | Continual | The parties only |
| PTAB designations and practice | Fast | Board panels |
Federal Circuit decisions are the ones to watch. It hears all patent appeals, so its rulings apply everywhere.
District court decisions are persuasive, not binding, though a construction adopted in a case involving your competitor tells you what arguments are working.
Primary sources
| Source | Covers | Cost |
|---|---|---|
| Federal Circuit opinions | Binding appellate decisions | Free |
| USPTO PTAB pages | Designations, Director review | Free |
| PACER | Federal court dockets and filings | Per page, with a free threshold |
| USPTO Patent Center | Status and file histories | Free |
| USPTO Assignment Search | Transfers into assertion entities | Free |
| ITC records | Section 337 investigations | Free |
Assignment monitoring is underused as a litigation signal. Patents moving into an assertion entity frequently precede a campaign, and the transfer is visible before any complaint is filed. See assignment search.
Why this is not optional
| Without monitoring | Consequence |
|---|---|
| A case is filed against an affiliate | You hear late |
| A competitor's continuation publishes | Design change becomes expensive |
| Patents move to an assertion entity | No warning before the letter |
| Your FTO opinion's framework shifts | The willfulness defence weakens |
| A maintenance deadline passes | Asset lost for nothing |
Late notice is the recurring cost. Almost everything on that list is cheaper to address early and most of it is visible before it becomes a problem.
What to monitor
| Target | Why |
|---|---|
| Your own entity names | Cases naming you or affiliates |
| Main competitors | What is being asserted in your field |
| Patents you rely on being invalid | Challenges succeeding or failing |
| Patents that could reach your products | New grants and continuations |
| Known assertion entities in your sector | Campaign patterns |
| The precedential decision list | Framework changes |
Alerts on your own names should already exist. They catch filings naming subsidiaries and affiliates that would otherwise reach you slowly.
Continuations are the quiet risk. A competitor with a pending continuation can write claims aimed at your product after seeing it, and the application publishes at eighteen months.
PTAB practice moves fastest
| Period | Approximate institution rate |
|---|---|
| October 2024 | ~65% |
| February 2026 | ~37% |
Always attach the date to any institution figure. The discretionary denial framework has shifted substantially, and an undated rate is close to meaningless.
Check designations rather than citations. A decision described as precedential in an article may have been superseded since. See PTAB precedential decisions.
What should trigger action
| Signal | Action |
|---|---|
| A case naming you or an affiliate | Immediate — counsel, litigation hold |
| A competitor sued on patents that could reach you | Analyse those patents |
| Patents transferred into an assertion entity | Assess exposure |
| A decision changing the framework in your FTO opinion | Re-review |
| A patent you were relying on being invalid survives a challenge | Reassess |
| A published continuation reading toward your product | Watch, and consider a design change |
Framework changes matter to opinions already given. An opinion of counsel resting on a doctrine that has since moved may no longer support the good-faith position it was obtained for. See willful infringement.
Reading a docket
| Entry type | Tells you |
|---|---|
| Complaint | Which patents, which products, which court |
| Answer and counterclaims | The defence, and any assertion back |
| Scheduling order | Trial date — drives PTAB timing |
| Claim construction filings | Which terms are contested |
| Markman order | How terms were construed |
| Summary judgment motions | Where the case is weak |
| Stay motions | Whether a parallel PTAB case exists |
| Settlement or dismissal | The outcome, frequently unexplained |
The scheduling order is the most informative early document. Trial timing shapes whether a PTAB petition is viable, which is why petitioners watch it closely.
Most cases end in settlement without a public explanation, so absence of a judgment is not absence of an outcome.
Worked example: a monitoring setup
A mid-size manufacturer with 20 patents and 4 main competitors.
| Monitor | Source | Cost | Frequency |
|---|---|---|---|
| Own entity names in dockets | PACER alerts | Low | Continuous |
| 4 competitors in dockets | PACER alerts | Low | Continuous |
| New grants in 3 CPC classes | Free patent alerts | $0 | Weekly |
| Assignments on 12 watched patents | Assignment Search | $0 | Monthly |
| PTAB designations | USPTO list | $0 | Quarterly |
| Federal Circuit opinions | Court site | $0 | Weekly skim |
| Own maintenance fee windows | Internal docket | $0 | Continuous |
What it caught in one year
| Month | Signal | Outcome |
|---|---|---|
| March | Competitor sued by an NPE | 3 asserted patents analysed — none reached their products |
| June | 12 patents transferred to an IP LLC | Exposure assessed early |
| September | Continuation published, reading toward a product line | Design change made cheaply |
| November | Institution practice shift noted | FTO opinions re-reviewed |
The September catch is the one that paid for everything. A design change made before launch cost a fraction of what a redesign after a notice letter would have.
Almost all of it was free. The cost was attention, not licences.
Setting alerts
| Alert | Where | Frequency |
|---|---|---|
| Own entity names in new filings | PACER | Immediate |
| Competitor names | PACER | Immediate |
| New grants in relevant CPC groups | Patent alert services | Weekly |
| Assignments on watched patents | Assignment Search | Monthly |
| Precedential list changes | USPTO | Quarterly |
Include every entity name you operate under, plus subsidiaries and former names. A case naming a dormant subsidiary still reaches you.
Secondary sources
| Type | Use |
|---|---|
| Firm alerts and newsletters | Triage — what to look at |
| Trade press | Sector context |
| Commercial litigation databases | Scale monitoring |
| Practitioner blogs | Early analysis |
Use secondary sources to find things, primary sources to rely on them. A summary describes the position at the time of writing, and both designations and practice move.
Commercial databases earn their cost at scale. Tracking four entities is manageable free; tracking two hundred is not.
Litigation and the fee decision
| Ipiry Patent Survival Curve v1.0 | Rate |
|---|---|
| Survive the 3.5-year fee (2022 cohort) | 85.8% |
| Survive the 7.5-year fee (2018 cohort) | 64.6% |
| Reach full term (2014 cohort) | 41.4% |
| Abandoned before full term | 58.6% |
Computed from 27,273,654 USPTO maintenance fee records covering 8,262,336 US utility patents — see the patent survival curve.
A patent asserted against you may already be dead. Checking status is the first step of any response and it takes three minutes.
Patent litigation updates: the checklist
- Watch three layers — statute, courts, PTAB — at their different speeds.
- Prioritise Federal Circuit decisions. They bind everyone below.
- Set docket alerts on your own entity names and your main competitors.
- Monitor assignments into assertion entities. Transfers precede campaigns.
- Check the USPTO precedential list quarterly, not the citations in articles.
- Date every practice statistic, especially institution rates.
- Watch published continuations reading toward your products.
- Re-review FTO opinions when the framework they rest on moves.
- Use secondary sources to triage, primary sources to rely on.
- Check status first on anything asserted against you.