Luminex Files Federal Circuit Appeal in Ongoing Signify LED Patent Dispute

On 10 September 2025, the U.S. Court of Appeals for the Federal Circuit formally docketed a new appeal: Luminex International Co., Ltd. v. Signify Holdings B.V. The case, filed under docket number 2025-2093, stems from two inter partes review (IPR) proceedings at the U.S. Patent and Trademark Office—IPR2024-00101 and IPR2024-01469.

The appeal signals that Luminex is challenging USPTO rulings that favored Signify in disputes over LED lighting patents. The Federal Circuit’s Notice of Docketing marks the official start of the appellate process. From here, Luminex must quickly file required documents, including an Entry of Appearance, a Certificate of Interest, and a Docketing Statement. The Patent Office, meanwhile, has 40 days to forward the certified record of the proceedings to the appeals court.

This is only the procedural beginning. Over the next several months, the parties will exchange written briefs. Luminex will argue why the Patent Office erred, while Signify will defend the validity of the rulings. The Federal Circuit may later schedule oral arguments before issuing a decision.

For those tracking Signify’s patent enforcement strategy, this case is yet another reminder of how frequently its intellectual property is tested. As we noted earlier this summer, most companies ultimately settle rather than fight Signify’s vast patent portfolio through to judgment.

The outcome of Luminex’s appeal could have important implications. If successful, it might chip away at the scope of Signify’s LED patent rights. If not, it will reinforce Signify’s strong record of defending its intellectual property. Either way, the docketing of this case sets the stage for another closely watched round in the ongoing battles over lighting technology patents.

Go Deeper:  PTAB Invalidates Most of Signify’s ’336 Patent Claims