Glass & Ors v Freyssinet Ltd
Decision date: 21 October 2015
Neutral citation: [2015] EWHC 2972 (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
This case concerned UK Patent No. 2 426 008 for a hybrid two‑phase cathodic protection method and a discrete anode product. The court construed claim 1 as requiring the long‑term phase to be sacrificial (dissolution of sacrificial metal), found claim 1 valid but not infringed, and held claim 12 invalid for lack of inventive step. Freyssinet’s marketing/draft materials did not amount to offers or to indirect infringement in the UK.
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
The court's binding conclusions include that claim 1 must be given its ordinary meaning informed by the specification, such that the second, long‑term phase is primarily sacrificial metal dissolution; and that a single prior‑art document only negates novelty if it clearly and unambiguously teaches the combinable alternatives. Also, unpleaded arguments are generally to be disregarded (subject to limited exceptions, e.g. claim construction) unless no prejudice is shown.
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 observational guidance that parties in IPEC should plead construction arguments to avoid late surprises and that the skilled person is to be treated as unimaginative but practically experienced and familiar with relevant manufacture; commercial disincentives are of less weight in inventive‑step assessment than technical considerations.