Express Mobile's appeal against Meta kept website-building patent claims in the Federal Circuit's 2025 IPR stream.
The dispute turned on how the Board treated claim scope and whether prior art met the challenged limitations. The opinion is useful for distinguishing implicit claim construction from ordinary comparison of claims to references.
For software patent owners, the case is a reminder that broad web-authoring claims remain vulnerable in PTAB proceedings when prior tools map cleanly to the functional language.
For platform defendants, the decision reinforces IPR as a central tool against long-running web and mobile patent portfolios.