Glass and others v Freyssinet Ltd

Patent – Infringement. The Chancery Division considered the validity of two claims in a patent dispute concerning a technique to prevent the corrosion of rebars used in reinforced concrete. The court held that claim 1 of the patent, which described a method, was valid but not infringed. However, claim 12 of the patent, which described a product suitable for use in the technique, was invalid.

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