The Evidence: Sources You Can Check Today
The verification protocol for any §315(b) conclusion is three-source triangulation: the statutory text and USPTO guidance, a PTAB or Federal Circuit decision applying the bar, and USPTO trial statistics or another official record. A conclusion that cannot be traced to all three should be labeled unverified in the file.
Start with the USPTO AIA Trials hub at uspto.gov/patents/aia. It publishes the statute, the Trial Practice Guide, and PTAB Standard Operating Procedures. Check SOP2 (Rev. 16+) for how panels handle time-bar briefing. Use this site for wording and procedure, and check secondary summaries against it rather than the reverse.
For case-level application, search the Federal Circuit's opinion database at cafc.uscourts.gov for "315(b)" and read the PTAB decisions those opinions cite or review. The protocol requires at least one decision, not a summary of one, before a rule statement is used in advice.
File immediately after service buys full optionality and the longest possible response window to the patent owner's preliminary response; its cost is that claim construction may still be undeveloped, so it is strongest when prior art is already mapped to the asserted claims.
Buffer-filing in days 30–60 is the recommended default: it lets you test the complaint's claim-construction positions against your petition while preserving at least nine months of statutory runway, provided you measure your own drafting time and reserve a margin for a service-date or filing-system problem.
The last-30-days strategy maximizes development time but converts every drafting slip, docketing error, or filing friction into a potential forfeiture; a waiver or extension request is a remedy to seek after a problem, not a plan to rely on before one.
Choose the earliest date your claim construction and prior art are credible, and treat that date as a ceiling, not a target; if the two are ready on day 10, file then, and if they need six weeks, buffer-file and protect the margin.
Exceptions, Tolls, and Edge Cases
Exceptions to the §315(b) bar are narrow, document-specific, and are not created by negotiation. Treat each claimed exception as a verification task: obtain the operative instrument, read its scope, identify the parties and products it covers, and compare that record to the service date and trigger date. Settlement talks, extensions, and ongoing negotiations do not toll the bar; only a recognized exception can change the analysis.
Some petitioners argue that a covenant not to sue or an injunction should change the time-bar analysis, but that argument turns on the instrument's scope and on PTAB institution practice, not on any tolling rule: the operative text must cover the petitioner's own accused products rather than affiliates, subsidiaries, or a product family in general. Verify how the PTAB has treated covenants and the 2019 Fintiv consent practice against the decision or USPTO guidance before relying on it. A settlement-in-principle letter, term sheet, or email promising a future covenant is not an exception; obtain the executed covenant or order and file as if the bar still runs until you have it.
Under GoPro v. Kirtonkirlos, the trigger can attach through a privy's earlier service date. If your company acquired rights, obligations, or an enforcement position from a party that was served earlier, or if a founder, affiliate, or predecessor was served, investigate privity before relying on your own service date. The exception holds only where the relationship and timing do not make the earlier-served party your privy; it breaks where acquisition or assignment carries the earlier trigger with it.
A later petition can survive only through a granted joinder request under §315(c); a standalone refiling after the one-year date remains barred. The exception holds when the PTAB grants joinder to an existing review and the later petition is tied to that review; it breaks when a petitioner uses a new petition, new grounds, or a new party to restart the clock.
| Exception | Holds when | Breaks when |
|---|---|---|
| Covenant not to sue or injunction | Operative text covers the petitioner's accused products | It covers only affiliates or rests on a settlement-in-principle letter |
| Privity timing under GoPro | No privy relationship carries an earlier service date | Acquisition or assignment links the petitioner to an earlier-served party |
| Derivative or joined petition | PTAB grants joinder to an existing review | Petitioner files a standalone petition after the bar date |
For each exception, keep a short record of the instrument, effective date, bound parties, and covered products, then test it against the service date and trigger date. If any element is missing, assume the exception does not apply and preserve the filing margin.
And 315(b) Countdown Worksheet
Copy this worksheet into your docket and treat the service date as day 0, not the complaint's filing date. For a complaint served on 15 January 2026, the answer is typically due on 5 February 2026 (day 21 under FRCP 12(a)(1)(A)(i)), the internal petition target is 16 March 2026 (day 60), and the §315(b) bar date is 15 January 2027 (day 365). The day-60 target leaves 305 days of buffer; the last defensible filing date is day 335, 16 December 2026, thirty days before the bar.
Frequently Asked Questions
What three components make up the verification protocol for any §315(b) conclusion?
The verification protocol requires the statutory text and USPTO guidance, a PTAB or Federal Circuit decision applying the bar, and USPTO trial statistics or another official record.
What label should be applied when a §315(b) conclusion cannot be traced to all three required sources?
A conclusion that cannot be traced to all three should be labeled unverified in the file.
Which SOP revision should be checked for how panels handle time-bar briefing?
Check SOP2 (Rev. 16+) for how panels handle time-bar briefing.
How should case-level application research be conducted under the protocol?
Search the Federal Circuit's opinion database at cafc.uscourts.gov for "315(b)" and read the PTAB decisions those opinions cite or review.
What tradeoff does filing immediately after service involve?
Filing immediately after service buys full optionality and the longest possible response window to the patent owner's preliminary response, but its cost is that claim construction may still be undeveloped, so it is strongest when prior art is already mapped to the asserted claims.
What is the recommended default buffer-filing window and its purpose?
Buffer-filing in days 30–60 is the recommended default, and it lets you test the complaint's claim-construction positions against your petition.
Quick answers
| What verification protocol does the article describe for any §315(b) conclusion? | It describes three-source triangulation among statutory text and USPTO guidance, a PTAB or Federal Circuit decision applying the bar, and USPTO trial statistics or another official record. |
| What label should a conclusion receive if it cannot be traced to all three sources? | It should be labeled unverified in the file. |
| Where does the article say to start checking wording and procedure? | It says to start with the USPTO AIA Trials hub at uspto.gov/patents/aia. |
| Which SOP revision does the article mention for how panels handle time-bar briefing? | It mentions checking SOP2 (Rev. 16+) for how panels handle time-bar briefing. |
| What does filing immediately after service buy, and what is its cost? | It buys full optionality and the longest possible response window to the patent owner's preliminary response, while its cost is that claim construction may still be undeveloped. |
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