US 12502870

US12502870: Electrochromic Films with Edge Protection – A Technical Overview

Title: Electrochromic films with edge protection

Assignee: Lannray Optoelectronics Zhenjiang Co Ltd

Inventors: Zhao Chen, Jian Wang, Yan Zhou

Filing Date: March 15, 2024

Issue Date: December 23, 2025

Abstract: The patent describes a method for preparing an electrochromic device that incorporates edge protection. This method involves placing an edge protection material on first and second substrates, then positioning first and second interlayers within the area defined by the edge protection material on these substrates. An electrochromic film is then placed between these interlayers. The primary function of the edge protection material is to prevent chemicals from the interlayers from infiltrating the electrochromic film.

Plain-Language Overview of Independent Claims:

The patent contains one independent claim (Claim 1), which describes an electrochromic device with a specific edge protection configuration:

• Claim 1: This claim describes an electrochromic device featuring an electrochromic film with two electrode layers (a first and a second electrode layer) that face each other. The key inventive aspect is how the edges of these electrode layers are cut and sealed. Specifically, the first electrode layer is cut in a way that exposes a part of the inner surface of the second electrode layer. Conversely, the second electrode layer is cut to expose a portion of the inner surface of the first electrode layer. These exposed, opposing inner surfaces are then sealed by a first and a second edge protection material, respectively. This design aims to protect the active components of the electrochromic film.

CAFC 2026 Dockets:

A review of the U.S. Court of Appeals for the Federal Circuit (CAFC) scheduled cases for May and June 2026 did not reveal any dockets specifically mentioning US Patent 12502870. Therefore, there is no authoritative information currently available indicating active litigation for this patent in the CAFC for 2026.