Saertex France SAS v Hexcel Reinforcements UK Ltd
Decision date: 4 May 2016
Neutral citation: [2016] EWHC 966 (IPEC)
Overall AI summary confidence: high
Short overview
This short overview is intended to summarise the case, issues and outcome so far as they are supported by the judgment.
AI confidence in this short overview: high
Saertex sued Hexcel for infringement of EP 1 781 455 B1, and Hexcel counterclaimed invalidity; Hexcel admitted its product fell within claim 1 as granted. The court found the patent invalid both as granted and as amended: claim 1 as granted lacked novelty over Cytec and "Working with Fibreglass" and lacked inventive step over Crystic, claim 2 as granted likewise failed, and the conditional amended claims also lacked inventive step. The judge held that had the patent been valid, Hexcel would have infringed.
Ratio decidendi
This summary is intended to identify the ratio decidendi, meaning the legal reasons for deciding and the binding part of the decision.
AI confidence in this ratio decidendi summary: high
From the judgment: the skilled person for construction is the practical manufacturer of the treated reinforcements (not a wider, theoretical team); claim integers must be construed purposively (e.g. "present only on the surface" means not penetrating so as to cause fibre adhesion sufficient to reduce thickness); and clear concessions in interlocutory documents can be treated as conceding infringement if fairly read by the court.
Obiter dicta
This summary is intended to identify obiter dicta, meaning observations made by the way that were not necessary to deciding the case and are not binding.
AI confidence in this obiter dicta summary: medium
The judgment contains cautionary observations on case management: parties should not expand the composition of the skilled team late without informing the court, should have addressed adhesive penetration earlier or sought admissible experiments or expert supplements, and the court may order proportional measures to fill evidential gaps. The judgment also comments on the limits of claiming a solution to a stated problem where prior art already discloses relevant categories (a warning about "free beer" style claims).