Background
A.L.M. Holding Company and Ergon Asphalt & Emulsions jointly own six patents relating to warm-mix asphalt paving methods and compositions. In 2008, they licensed certain rights in the patents to MeadWestvaco Corporation (later replaced by Ingevity Corporation after a corporate merger). The license agreement granted Ingevity an exclusive, royalty-bearing, worldwide license to manufacture, import, use, and sell products under the patents.
Critically, the patent owners retained several rights. They kept the right to sue third-party infringers (subject to a mutual-determination provision), the right to withhold consent to sublicenses Ingevity might grant, and the right to collect royalties from both Ingevity and any sublicensees. If Ingevity failed to pay minimum annual royalties, the exclusive license would revert to non-exclusive.
When the patent owners sued Zydex for infringement, the District of Delaware dismissed the case, concluding that the plaintiffs had transferred away so many rights that they lacked Article III standing to sue. The patent owners appealed.
The Court’s Holding
The Federal Circuit reversed and remanded, holding that the patent owners retained sufficient exclusionary rights for constitutional standing. Writing for a unanimous panel, Judge Chen applied the Supreme Court’s standing framework from Lujan v. Defenders of Wildlife and Lexmark International v. Static Control Components, as well as the Federal Circuit’s own precedent in Lone Star Silicon Innovations v. Nanya Technology and WiAV Solutions v. Motorola.
The court focused on whether the retained right to sue was “illusory” — that is, whether the licensee could effectively nullify any infringement action by granting a royalty-free sublicense to the accused infringer. The answer was no: Ingevity could not grant sublicenses without the patent owners’ consent, and any sublicense would require payment of pass-through royalties. Because the licensee’s sublicensing power was constrained, the patent owners’ retained right to sue was meaningful, not illusory.
The court distinguished Morrow v. Microsoft, where a plaintiff who held only a bare right to sue — stripped from all other patent rights — lacked standing because the patent owner could moot the suit by granting a royalty-free sublicense. Here, the patent owners held both the right to sue and multiple other retained interests (royalty rights, sublicensing veto, and reversion rights), making their position fundamentally different.
Key Takeaways
- Retained royalty and veto rights preserve standing. A patent owner who grants an exclusive license can maintain Article III standing as long as the owner retains non-illusory exclusionary rights — such as a veto over sublicenses and continued royalty interests — that prevent the licensee from unilaterally eliminating the owner’s ability to enforce the patent.
- The right to sue is sufficient — it need not be the right to license. The court confirmed that the right to sue for infringement is itself an exclusionary right that can sustain standing, even without the right to grant licenses. The key question is whether that right to sue is real or merely theoretical.
- License agreements should explicitly preserve enforcement rights. This decision provides a roadmap for patent owners who want to monetize their portfolios through exclusive licenses while preserving the ability to enforce against infringers. Including consent-based sublicensing, pass-through royalty provisions, and explicit enforcement rights ensures the owner retains standing.
Why It Matters
This precedential decision clarifies the line between patent licensing structures that preserve standing and those that effectively transfer all meaningful rights to the licensee. For patent owners, universities, and technology holding companies that rely on exclusive licensing as their primary business model, the case provides reassurance that well-drafted agreements can both maximize license revenue and preserve the ability to enforce patents against third parties. The ruling also cautions licensees and accused infringers: a defense based on the patent owner’s alleged lack of standing will fail when the license agreement contains substantive retained rights rather than a bare contractual right to sue.
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