Signify Luminex IPR 2025: June PTAB Showdown May Hinge on RPI Challenge
The next chapter in the dispute between Signify Holdings B.V. and Luminex International Co., Ltd. will unfold on 11 June 2025, when both sides present arguments before the Patent Trial and Appeal Board (PTAB) in case IPR2024-00101. In a filing dated 28 April, Signify requested a remote hearing and 60 minutes per side for oral arguments. Luminex agreed to both requests.
The case centers around U.S. Patent No. 10,299,336. Luminex challenges claims under multiple grounds, citing prior art references including Chaimberg, Halliwell, Roberge, and Reiff. Signify plans to argue that its claims are valid and entitled to a priority date of February 19, 2016, based on an earlier provisional application. The debate will also focus on whether Luminex’s evidence qualifies as true prior art and whether the claims would have been obvious at the time.
One of the most closely watched issues involves Signify’s argument that Luminex’s petition may be time-barred. Signify alleges that Luminex had a relationship with Menard, Inc., which should have been disclosed as a Real Party-In-Interest (RPI). This procedural challenge mirrors a trend covered in EdisonReport’s article, “RPI Upends IPR”, where Real Party-In-Interest disputes have become pivotal. A finding in Signify’s favor could invalidate the entire IPR, regardless of the technical merits.
If the PTAB agrees that Luminex failed to disclose an RPI relationship, the Board could dismiss the case outright. Such an outcome would reinforce how critical procedural precision has become in IPR disputes. The EdisonReport will continue to monitor this case closely. Whether based on substance or procedure, the PTAB’s decision in June could set another important precedent for the lighting industry.