Settlements are supposed to end disputes. But a settlement can simply create the next dispute if a future payment depends on an event the agreement does not define precisely enough.
That is the practical lesson from T-Mobile US, Inc. v. KAIFI LLC, a patent case involving a settlement agreement that required an additional payment if certain patent claims “survived” a Patent Office proceeding. What looked like convenient shorthand when the agreement was signed later became the center of a new lawsuit.
A Settlement Tied Payment to a Future Patent Office Decision
KAIFI sued T-Mobile for allegedly infringing a patent involving Wi-Fi calling technology. While the lawsuit was pending, T-Mobile asked the U.S. Patent and Trademark Office to reexamine the patent.
The parties settled before that process was complete. T-Mobile received a patent license and made an initial payment. It also agreed to make another payment “if any Asserted Claim survives the EPR,” referring to the ex parte reexamination.
Reexamination is a Patent Office procedure for reconsidering whether previously issued patent claims should remain valid. The Patent Office can confirm claims, cancel them, or allow them in amended form.
Here, seven of the eight identified patent claims were confirmed without amendment. An eighth was allowed in amended form. T-Mobile nevertheless argued that the claims had not really “survived” because KAIFI allegedly made statements during the reexamination that changed how the claims should be understood. T-Mobile therefore refused to make the additional payment.
The Word “Survives” Did Not Carry a Special Legal Meaning
The Federal Circuit, the federal appeals court that handles many patent appeals, concluded that “survives” was not a specialized patent-law term with a defined legal meaning. Courts may commonly say that patent claims “survive” Patent Office review, but that does not automatically turn the word into legal shorthand with one fixed meaning.
More importantly, the court concluded that the contract dispute could be decided without resolving T-Mobile’s more complicated patent arguments. A court could simply interpret the settlement agreement and compare its language with the Patent Office’s formal reexamination results.
That distinction also meant that the Federal Circuit lacked jurisdiction over the appeal. The court transferred the case to the Fifth Circuit, which will address the contract dispute. The Federal Circuit did not decide whether T-Mobile ultimately owes the additional payment.
Identifying a Future Event Is Not the Same as Defining It
The drafting problem is broader than the word “survives.”
Whenever money changes hands depending on a future event, an agreement should describe that event with enough precision that the parties can determine whether it happened without reconstructing what they thought they meant years earlier.
For a payment tied to Patent Office proceedings, that may require specifying what happens if a claim is confirmed unchanged, amended, replaced, canceled, or supplemented by a new claim. The parties may also need to decide whether statements made during the proceeding matter, and when the result becomes final enough to trigger payment.
The T-Mobile settlement shows what can happen when the parties recognize one of these uncertainties but do not resolve it. During negotiations, the parties apparently disagreed about whether an amended claim would count as having survived. Rather than deciding the issue, they recorded the disagreement in a footnote. Fortunately for purposes of the immediate dispute, several claims were confirmed without amendment. But preserving an unresolved issue in the contract did not allocate the underlying risk.
Draft the Trigger Around the Result You Actually Care About
The practical question is not simply what terminology to use. It is what commercial result the parties intend the payment provision to measure.
If payment is supposed to depend only on whether the Patent Office formally confirms a claim, the agreement can say so. If it is supposed to depend on whether the patent still covers a particular product after the proceeding, that is a different test and may require a later infringement analysis. If amendments, changes in claim scope, or enforceability issues are supposed to affect payment, those consequences should be addressed expressly.
The same principle applies well beyond patent settlements. Earnouts, milestone payments, royalties, licensing fees, acquisition consideration, and other contingent obligations often depend on future events. A short label for the triggering event can be attractive during negotiations, but ambiguity becomes expensive when substantial money is riding on what the label means.
The more detailed legal and jurisdictional analysis of T-Mobile US v. KAIFI is available in the Technology & Information Law Blog article.
About the Author: Charles Gideon Korrell is a technology-transactions attorney and strategic advisor whose practice focuses on technology licensing, commercial transactions, intellectual property strategy, and related matters. More information about his practice is available at GideonKorrell.com. He publishes the Technology & Information Law Blog at TechInfoLaw.com, where he provides more detailed analysis of judicial decisions and legal developments affecting technology and intellectual property.